Jobs Backend

We're looking for an AI-Native Full-Stack Python Developer who is passionate about software engineering and excited to build real products using modern AI tools.

Project: 2-3 months, with the possibility of extension.

At Flexipy, you'll build production software for international clients in SaaS, AI, and business automation. We're looking for developers who enjoy solving real problems, communicate well, and are ready to take responsibility for their work. You'll collaborate with experienced engineers while continuously expanding your technical and product expertise.

We believe modern software engineers should know how to collaborate with AI, not compete against it. Claude Code, Cursor, ChatGPT, and similar tools are part of our daily development workflow. We expect every developer to know how to use AI responsibly to accelerate development while maintaining high engineering standards.

Core Technical Skills:

• Good understanding of Python Core (OOP, clean code, basic async)
• Experience with Django or FastAPI
• Basic understanding of REST APIs and backend architecture
• Basic knowledge of PostgreSQL or other relational databases
• Basic knowledge of React and JavaScript/TypeScript
• Experience using Git and collaborative development workflows

AI Development Skills:

• Daily experience using AI-assisted development tools such as Claude, Claude Code, Cursor, ChatGPT, GitHub Copilot, or similar
• Ability to write clear, structured prompts for software engineering tasks
• Understanding of prompt engineering fundamentals and effective context management
• Experience using AI for code generation, debugging, refactoring, documentation, testing, and research
• Ability to review, validate, and improve AI-generated code instead of accepting it blindly
• Curiosity to explore new AI tools and incorporate them into daily development workflows

Communication & Professional Skills:

• English level: B2+ (written and spoken) — comfortable communicating directly with teammates and clients
• Good communication and collaboration skills
• Responsibility and ownership of assigned tasks
• Self-organization and attention to detail
• Strong problem-solving mindset
• Curiosity, continuous learning, and willingness to grow professionally
• Ability to receive feedback and continuously improve

What You'll Do:

• Build backend features using Django or FastAPI
• Contribute to real client projects in SaaS, AI, and business automation
• Build and maintain REST APIs
• Fix bugs and implement new features
• Support frontend development using React
• Work with PostgreSQL and integrate third-party APIs when needed
• Write clean, maintainable, and well-documented code
• Use AI tools such as Claude Code, Cursor, and ChatGPT as part of your daily development workflow
• Participate in code reviews, daily syncs, technical discussions, and occasional client meetings
• Continuously improve your technical, product, and AI development skills

Nice to Have:

• Docker and Docker Compose
• Celery and Redis
• Basic CI/CD knowledge
• Experience with OpenAI, Anthropic, or other LLM APIs
• Testing fundamentals (Pytest, frontend testing)
• AWS, DigitalOcean, or other cloud platforms
• Active GitHub profile or open-source contributions

What We Value:

• Responsibility and ownership
• Honest and open communication
• Curiosity and continuous learning
• Attention to detail
• Teamwork and collaboration
• Product mindset
• Long-term commitment and professional growth

What We Offer

• Fully remote work
• Flexible working hours (start between 8:00–10:00)
• Work on modern international SaaS, AI, and automation products
• Mentorship from experienced engineers
• Daily use of modern AI development tools and workflows
• No micromanagement or screen monitoring
• Daily team syncs and weekly planning
• Friendly and collaborative engineering culture
• Learning budget after successful probation (courses, books, certifications)

Compensation:

$600–1100/month, depending on your technical assessment, experience, communication skills, and interview results.

Career Growth:

We believe in growing engineers—not just filling positions.

We conduct a performance and salary review after approximately 6 months, focusing on your technical growth, ownership, communication, and overall contribution to the team.

Ready to Apply?

If you're passionate about Python, AI, and modern software development—and want to build real products while growing alongside experienced engineers—we'd love to hear from you.

Please include:

• Your CV or LinkedIn profile
• GitHub profile (if available)
• A few words about projects you've worked on (commercial, freelance, university, or personal)
• A short note describing how you use AI tools (Claude, Cursor, ChatGPT, Claude Code, etc.) in your daily development workflow
• Your English level and availability

We are building a modern exam preparation platform and are looking for a proactive AI Developer to join our team. If you live and breathe artificial intelligence, follow the latest LLM releases, and write code in close collaboration with AI agents, we would love to see you on our team!

Responsibilities:

• Supporting and developing the exam preparation platform (stack: Python/Django + Next.js) using LLMs (Claude, GPT, Gemini, etc.) and AI agents.
• Designing and building efficient AI pipelines for the automated generation, processing, and verification of educational content.
• Troubleshooting and resolving product issues, taking the initiative for improvements (autonomy in defining tasks).

• Working with Git, participating in team sprints, and collaborating with other developers and a designer.

   

Hard Skills & Experience:

• LLM Knowledge: Deep understanding of how modern models (Claude, GPT, Gemini) work. You know their strengths and weaknesses and understand when and which model to choose for a specific task.
• Working with AI Agents: Confident daily work with AI coding agents (Claude Code, Cursor, Copilot, etc.).
• Prompt Engineering & Validation: Ability to task models to get the highest quality results, and the skill to critically review generated code/content.
• Tech Stack: Strong knowledge of Python (Django) and Next.js.
• Git: Solid proficiency with version control systems.
• Autonomy: You know how to drive processes and work without detailed specifications, making architectural and technical decisions independently.

• Curiosity: You keep your finger on the pulse of the AI industry, follow new tools, and quickly try them out in real-world work.

   

Nice to Have:

• Practical experience with LLM APIs.

• Experience with relational databases (PostgreSQL).

   

Soft Skills:

• Responsibility: Said and done; taking ownership of your tasks.
• Critical Thinking: You don't just write code or accept answers from AI; you understand "why it is so" and "how to make it better."
• Flexibility: Readiness to adapt to rapid changes in the project and in AI technologies.

• Attention to Detail: Especially in reviewing generated content and pipeline architecture.

   

When submitting your resume, please be sure to include case studies of projects you have worked on.

Engagement: Full-time
Location: EU (mandatory)
English: Upper-Intermediate (B2)
Availability: Full-time
 

About the Role

We are looking for an experienced Back End Engineer to join our team and work on a project using Python and FastAPI.

We need an engineer who can independently manage the entire backend development lifecycle — from understanding requirements and designing solutions to implementation, testing, deployment, and production support.
 

Requirements

• Commercial experience with Python and FastAPI in production.
• Hands-on experience with asyncio, Dependency Injection, and background tasks.
• Strong knowledge of PostgreSQL, including transactions, locking, indexes, and safe migrations.
• Experience implementing authentication and authorization using OAuth2/OIDC and JWT.
• Understanding of stateless services and backend architecture principles.
• Production experience with AWS or Azure.
• Daily use of AI-powered development tools such as GitHub Copilot, Cursor, Claude, or similar.
• Ability to work autonomously, translate requirements into technical solutions, make engineering decisions, write tests, and deliver features to production.
   

Nice to Have

• Experience with Redis.
• Knowledge of Hasura and GraphQL.
   

Important Details

• Candidates must be physically located in an EU country.
• Full-time availability is required.
• English level: Upper-Intermediate (B2) or higher.

We are looking for a Software Engineer - Software Engineer - Identity & Access Management to join our team.

Key Responsibilities:

• Design, develop, and maintain high-throughput, low-latency identity services, including Single Sign-On (SSO), Multi-Factor Authentication (MFA), and session management and federation;
• Implement and scale modern authentication and authorization protocols (OAuth 2.0, OpenID Connect, JWT assertions,..);
• Write clean, concurrent, and highly performant backend code primarily in Golang to support our rapidly growing user base;
• Utilize your DevOps background to deploy, manage, and monitor identity services;
• Act as the subject matter expert on authentication and guide other engineering teams on securely integrating with our identity platform;
  Design and maintain solutions involving custom and standard identity providers, like KeyCloak and AWS Cognito.
   

What we are looking for:

• Solid understanding of web security, and user identity in the context of federated authentication;
• Proven experience as a software engineer building complex, distributed backend systems, with a strong, demonstrated proficiency in Golang and gRPC;
• Deep conceptual understanding and practical experience with modern authentication flows, authorization frameworks, and cryptographic fundamentals (e.g., OAuth2, OIDC, RBAC,..);
• Hands-on experience with modern infrastructure tooling. You should be comfortable with cloud platforms (AWS,..), container orchestration (Kubernetes), and Infrastructure as Code (Terraform, Terragrunt, Tofu,..);
• A solid grasp of secure coding practices, common web vulnerabilities (OWASP Top 10), and how to mitigate them at the architectural level;
• The ability to design scalable systems that can handle massive throughput without compromising on latency or security;
• You can explain complex security and architectural concepts to both technical and non-technical stakeholders, driving consensus across teams.

We offer

• Maximum flexibility;
• Professional trainings, conferences and certifications;
• Corporate events and benefits;
• Professional literature;
• English courses.

About the Role

We're looking for a curious and motivated Junior Python Engineer to join our team. You'll be building backend services, REST APIs, and data-processing pipelines, with some exposure to cloud infrastructure along the way.

We work in pairs — juniors are always paired with someone at a similar or slightly higher level, not just for code reviews, but for day-to-day coding, architecture decisions, and problem solving. This is production work: you'll ship backend services that customers rely on, with the safety net of another teammate beside you.

The client is US-based, so the team works US business hours; for engineers in Ukraine, this means your working day ends around midnight Kyiv time. This role can be full-time or part-time, depending on your availability.
 

What You'll Work On

• Backend Services & APIs — build and maintain REST APIs and backend services for client platforms.
• Document Processing — build pipelines for validation, extraction, and status tracking.
• AWS Integrations — work with AWS infrastructure managed through Terraform.
• Internal Tooling — build workflow automation and internal tools.

Tech Stack

• Backend — Python (our main language), a web framework (most of our services run on one), SQL or a NoSQL store for reading and writing data.
• Cloud — AWS (Lambda, S3, IAM) and Terraform — both nice-to-haves, you'll pick up what you need on the job.

Working Hours & Format

This role can be full-time or part-time, depending on your availability. It's remote, with occasional face-to-face working sessions. Our client operates on US business hours, so the schedule needs to align with US time zones — for engineers based in Ukraine, your working day will end around midnight Kyiv time.

Requirements

Solid fundamentals in Python, familiarity with a web framework, and a basic understanding of REST APIs.

Exposure to AWS or Terraform is a plus, but not required — you'll pick up what you need on the job. We care more about your curiosity and attitude than your CV.

Stack: Node.js (TypeScript), AWS (focus on AWS Lambda), Step Functions, MySQL, Docker, Microservices, Serverless, AI Agents.
 

We are seeking an experienced Middle+ Node.js Developer to join our team of talented developers for a stable yet dynamic enterprise product.

As a Node.js Developer, you will play an integral role in developing, maintaining, and refactoring the existing codebase of a multi-service product with complex business logic. You will work closely with our experienced Backend team, leverage the latest technology stack, and have clear opportunities to grow into a Team Lead role in the future.

About the Project

A stable enterprise product for creating marketing presentations, preparing accompanying materials, and developing sales cycle business assistants for global pharmaceutical companies (such as AstraZeneca, Novartis, Pfizer, Veeva) and financial institutions (such as ING and Van Lanschot). We have been developing our own codebase since 2015.

Our services are distributed across multiple Availability Zones, adhering to a service-oriented architecture. Since 2018, we have prioritized GraphQL, although we maintain comprehensive support for RESTful APIs. Our core API services are built on a diverse stack of programming languages, each chosen to optimize task performance. This stack includes a rapidly evolving Golang Core API, legacy Core API services in PHP (leveraging frameworks like Laravel and Yii2) for established business logic and data layer interactions, Node.js (utilizing both JavaScript and TypeScript), Python APIs, and .NET Core C# components.

We utilize a hybrid cloud infrastructure, harnessing the strengths of both AWS and GCP to meet our operational needs, with a heavy focus on Serverless. Our work also involves extensive integration with API partners, including Veeva, Salesforce, and various others, to ensure a seamless and robust service ecosystem.

As a product with high-security requirements, we undergo regular penetration testing from auditors and client companies to ensure compliance with industry standards such as OWASP, SOC, and ISO.

Who We Are Looking For

• A TypeScript & Cloud Expert: Strong commercial experience with deep expertise in TypeScript and cloud-native serverless solutions.
• Polyglot Mindset: Readiness to write code in Golang and other languages if needed. Prior knowledge of Golang or PHP is a strong plus, but if you don't know them yet, you should be eager and ready to pick them up on the job.
• Tech-Forward (AI-Ready): Experienced in working with AI agents and tools to streamline and boost your development workflow.
• Proactive & Communicative: Strong soft skills, clear expression of thoughts, active involvement in decision-making, and high self-organization.
• Leadership Ambitions: An engineer who is interested in growing into a Team Lead position as the team and project evolve.

Essentials

• Strong commercial experience in backend software engineering (Middle+ or Senior level).
• Deep knowledge of TypeScript & Node.js, with proven hands-on experience in AWS Lambda, AWS Step Functions, Express, and NestJS.
• Solid Cloud expertise: Hands-on experience with serverless architecture and AWS services.
• Proficiency in software testing, including unit, integration, functional, and regression testing.
• Expertise in performance monitoring, optimization techniques, and troubleshooting.
• Strong knowledge of SQL, databases, and a solid understanding of transactions.
• Deep understanding of OOP, design patterns, cryptography, algorithms, and data structures.
• Versatility and comprehension of how all aspects of a web project work together (frontend, backend, and the network layer).
• Practical System Design skills.
• Practical experience using AI coding assistants / AI agents in daily workflows.
• Strong soft skills, proactive attitude, and interest in moving towards a Team Lead role.
• English reading and writing: Upper-Intermediate.
• English speaking: Lower-Intermediate (Upper-Intermediate is a plus).

Nice-to-haves

• Hands-on experience or prior development background in Golang and PHP.
• Experience in building APIs using both REST and GraphQL.
• Understanding of EDA (Event-Driven Architecture), Microservices, Hexagonal Architecture.
• Proficiency in Docker and hands-on experience with CI/CD Pipelines.
• Familiarity with agile methodologies (Scrum, Kanban).
• Degree in Computer Science or related field.

• English speaking: Upper-Intermediate.
  
  Benefits:

  In addition to a great base salary, we offer:

• Funding for conferences, co-working spaces, software licenses, and other work-related expenses
• MacBook if you require one
• Mobile devices if you are involved with mobile development projects
• Flexible working hours and fully remote working without micromanagement
• Modern technology stack
• Time for open source development
• Bonus at the end of the year
  Paid study leave
• Paid English language courses
• 36 company-paid days off per annum
• Access to educational streaming services like Pluralsight
• Input on the development of the company

Our core values:
We are open-minded, humble, respectful, self-driven, and honest, which allows us to create an atmosphere of synergy. Our team is a great fit for those who value self-organization and are passionate about personal growth. If this resonates with you, we’d love to have you join the team.

We are looking for a Senior Python Developer who is ready to scale and grow with us.
 

If you’re passionate about clean code, scalable backend architecture, and excited to build something impactful, we’d love to meet you!
 

What will you do?
 

• Contribute to the full backend lifecycle, from architecture design to production deployment;
• Design, develop, and maintain RESTful APIs using Python, Flask, FastAPI, and SQLAlchemy;
• Implement microservices architecture with message brokers and API gateways;
• Implement authentication and authorization with industry-standard encryption and access control;
• Optimize backend services for performance and efficiency, identifying bottlenecks and implementing solutions to improve response times and resource utilization;
• Implement complex algorithms and data structures to handle data processing, operations research (OR), recommendation systems, and optimization problems;
• Deploy and scale services on GCP (Cloud Functions, Cloud Run, Kubernetes); containerize with Docker;
• Design and optimize database schemas using PostgreSQL/MySQL and integrate Pandas/NumPy for analytics and ML;
• Document API specifications using OpenAPI (formerly Swagger);
• Collaborate with frontend, data science, and DevOps teams to align backend with product goals;
• Maintain engineering standards through code reviews, documentation, and knowledge sharing.
 

Requirements:

• 7+ years of commercial experience in backend development with Python;
• Upper-Intermediate English (B2 or C1) for comfortable verbal team communication.
• Strong hands-on experience with Python, Flask, and SQLAlchemy, Pandas, NumPy;
• Proficiency with Docker and Kubernetes;
• Expertise in software architecture and design patterns, with a proven track record of solving complex technical and performance problems;
• Strong understanding of algorithmic complexity, optimization techniques, and best practices for designing efficient algorithms to solve complex problems;
• Proven ability to handle complex, loosely defined business logic and structure intricate processes cleanly;
• Solid grasp of software architecture and design patterns, with a track record of solving complex technical and performance problems;
• Autonomous in architectural decision-making, comfortable owning hard problems end to end;
• Bonus points if you’ve worked in medical or sports domains.

Why Solid Software?
 

• We support Ukraine;
• A wonderful team of enthusiasts and like-minded people;
• Atmosphere of comfortable work & life balance;
• Flexible schedule and work-from-home opportunity;
• Opportunity to work on projects with different directions (web, mobile, tablet, watch, desktop);
• MacBook Pro and great tech;
• Decent compensation;
• Lack of bureaucracy;
• Compensation for professional events, sports activities;
• Corporate online parties and fun team-buildings;
• Anniversary and birthday presents.
 

Professional growth:
 

• Onboarding and mentorship program with a dedicated onboarding guide built by our team;
• Internal Career Path program from Developer to Architect that consists of knowledge areas for IT specialists, books, training sessions, and work activities;
• Corporate library with the best programming books (+ an ability to order a particular book if we don’t have it);
• Professional and constant feedback.
 

We truly value the unique talents and skills that each individual brings to our company. As we continue on our journey of growth, we eagerly anticipate the opportunity to welcome you into our team.
 

Apply now and help us shape what comes next!

Python AI Product Engineer (FastAPI / LLM)

Location: Remote (Europe / Ukraine)
Employment: Full-time
Company: MTicket

 

About Us

MTicket is a technology company operating in the ticketing and live events industry. Our platforms support ticket sales, event management, payments, marketing, customer interactions, and various business operations.
We are actively developing our AI engineering direction to introduce intelligent automation and AI-powered functionality into our products and internal processes.
We're looking for a Senior Python AI Product Engineer who can turn ideas and business challenges into real, production-ready AI solutions.
This is a hands-on engineering role for someone who enjoys building products, experimenting with modern AI capabilities, and delivering working solutions.
We're not looking for someone who simply uses AI coding assistants. We need an engineer who has already built and launched AI-powered applications using LLM APIs.


 

What You'll Do

• Design, develop, and launch AI-powered applications and product features using Python and FastAPI.
• Integrate LLMs such as OpenAI, Anthropic, or similar providers through APIs.
• Build intelligent assistants, AI agents, and automated workflows to solve real business problems.
• Develop backend services that connect AI capabilities with existing business systems.
• Implement LLM tool/function calling, structured outputs, and multi-step workflows.
• Integrate third-party APIs, databases, and internal services.
• Work on AI solutions for ticketing, customer support, marketing, analytics, and operational processes.
• Collaborate with other engineers to build scalable and reliable AI-powered functionality.
• Take ownership of features from technical design and implementation to deployment and production support.
• Continuously improve AI functionality, response quality, performance, and API usage costs.

Our Tech Stack

• Backend: Python, FastAPI
• AI: LLM API integrations (OpenAI, Anthropic, or similar)
• Architecture: REST APIs, backend services, third-party integrations
• Development: Git

Our approach is pragmatic: we choose technologies based on the problem we're solving rather than relying on a specific AI framework.


 

What We're Looking For

• 3+ years of professional Python backend development experience.
• Solid commercial experience with FastAPI and backend API development.
• Proven experience building and launching AI-powered applications or product features in production.
• Hands-on experience integrating LLMs through APIs (OpenAI, Anthropic, Gemini, or similar).
• Experience developing AI assistants, AI agents, intelligent automation, or multi-step LLM workflows.
• Strong understanding of REST APIs, integrations, databases, and backend architecture.
• Experience implementing and maintaining production applications.
• Ability to independently design and deliver complete features.
• Understanding of AI application limitations, error handling, response validation, and API cost management.
• Strong problem-solving skills, ownership, and a product-oriented mindset.
• Ukrainian or Russian language proficiency at C1 level or higher.

Nice to Have

• Experience developing AI-first SaaS products or commercial AI applications.
• Hands-on experience with LangChain, LangGraph, or similar AI orchestration frameworks.
• Experience with RAG, embeddings, vector databases, or MCP.
• Experience building AI workflows involving multiple tools or external services.
• Familiarity with LLM evaluation, prompt optimization, and structured output validation.
• Experience in e-commerce, marketplaces, payments, ticketing, or marketing automation.
• Experience with cloud infrastructure, Docker, and asynchronous backend processing.
• Experience independently shipping products from idea to production.

What Makes a Great Candidate

We especially value engineers who have already built real AI applications and can confidently explain:
 

• What AI product or functionality they developed.
• What problem it solved and who used it.
• How LLM APIs were integrated into the application.
• What backend architecture and integrations they implemented.
• Which parts of the solution they personally owned.
• How they handled errors, unexpected AI responses, and production challenges.
• How the product was deployed and improved based on real-world usage.

We value practical engineering experience, independent thinking, and the ability to deliver useful products over knowledge of specific frameworks.


 

What We Offer

• The opportunity to build AI-powered products for an established ticketing and live events business.
• A growing AI engineering direction with significant room for innovation.
• Real business challenges where your work can have a measurable impact.
• Ownership of AI functionality from idea to production.
• Direct collaboration with engineering and business teams.
• Freedom to propose technical solutions and experiment with modern AI technologies.
• A fully remote working environment.
• A collaborative team and a practical, results-oriented engineering culture.

Interested?

If you've already built AI-powered products using Python and LLM APIs, enjoy solving real business problems, and want to see your solutions used in production, we'd love to hear from you.
When applying, please briefly describe an AI-powered product or feature you've personally built and launched. Feel free to share relevant GitHub repositories, product links, or examples of your work.

Stack: Node.js (TypeScript), AWS (focus on AWS Lambda), Step Functions, MySQL, Docker, Microservices, Serverless, AI Agents.
 

We are seeking an experienced Senior Node.js Developer to join our team of talented developers for a stable yet dynamic enterprise product.

As a Node.js Developer, you will play an integral role in developing, maintaining, and refactoring the existing codebase of a multi-service product with complex business logic. You will work closely with our experienced Backend team, leverage the latest technology stack, and have clear opportunities to grow into a Team Lead role in the future.

About the Project

A stable enterprise product for creating marketing presentations, preparing accompanying materials, and developing sales cycle business assistants for global pharmaceutical companies (such as AstraZeneca, Novartis, Pfizer, Veeva) and financial institutions (such as ING and Van Lanschot). We have been developing our own codebase since 2015.

Our services are distributed across multiple Availability Zones, adhering to a service-oriented architecture. Since 2018, we have prioritized GraphQL, although we maintain comprehensive support for RESTful APIs. Our core API services are built on a diverse stack of programming languages, each chosen to optimize task performance. This stack includes a rapidly evolving Golang Core API, legacy Core API services in PHP (leveraging frameworks like Laravel and Yii2) for established business logic and data layer interactions, Node.js (utilizing both JavaScript and TypeScript), Python APIs, and .NET Core C# components.

We utilize a hybrid cloud infrastructure, harnessing the strengths of both AWS and GCP to meet our operational needs, with a heavy focus on Serverless. Our work also involves extensive integration with API partners, including Veeva, Salesforce, and various others, to ensure a seamless and robust service ecosystem.

As a product with high-security requirements, we undergo regular penetration testing from auditors and client companies to ensure compliance with industry standards such as OWASP, SOC, and ISO.

Who We Are Looking For

• A TypeScript & Cloud Expert: Strong commercial experience with deep expertise in TypeScript and cloud-native serverless solutions.
• Polyglot Mindset: Readiness to write code in Golang and other languages if needed. Prior knowledge of Golang or PHP is a strong plus, but if you don't know them yet, you should be eager and ready to pick them up on the job.
• Tech-Forward (AI-Ready): Experienced in working with AI agents and tools to streamline and boost your development workflow.
• Proactive & Communicative: Strong soft skills, clear expression of thoughts, active involvement in decision-making, and high self-organization.
• Leadership Ambitions: An engineer who is interested in growing into a Team Lead position as the team and project evolve.

Essentials

• Strong commercial experience in backend software engineering (Middle+ or Senior level).
• Deep knowledge of TypeScript & Node.js, with proven hands-on experience in AWS Lambda, AWS Step Functions, Express, and NestJS.
• Solid Cloud expertise: Hands-on experience with serverless architecture and AWS services.
• Proficiency in software testing, including unit, integration, functional, and regression testing.
• Expertise in performance monitoring, optimization techniques, and troubleshooting.
• Strong knowledge of SQL, databases, and a solid understanding of transactions.
• Deep understanding of OOP, design patterns, cryptography, algorithms, and data structures.
• Versatility and comprehension of how all aspects of a web project work together (frontend, backend, and the network layer).
• Practical System Design skills.
• Practical experience using AI coding assistants / AI agents in daily workflows.
• Strong soft skills, proactive attitude, and interest in moving towards a Team Lead role.
• English reading and writing: Upper-Intermediate.
• English speaking: Lower-Intermediate (Upper-Intermediate is a plus).

Nice-to-haves

• Hands-on experience or prior development background in Golang and PHP.
• Experience in building APIs using both REST and GraphQL.
• Understanding of EDA (Event-Driven Architecture), Microservices, Hexagonal Architecture.
• Proficiency in Docker and hands-on experience with CI/CD Pipelines.
• Familiarity with agile methodologies (Scrum, Kanban).
• Degree in Computer Science or related field.

• English speaking: Upper-Intermediate.
  
  Benefits:

  In addition to a great base salary, we offer:

• Funding for conferences, co-working spaces, software licenses, and other work-related expenses
• MacBook if you require one
• Mobile devices if you are involved with mobile development projects
• Flexible working hours and fully remote working without micromanagement
• Modern technology stack
• Time for open source development
• Bonus at the end of the year
  Paid study leave
• Paid English language courses
• 36 company-paid days off per annum
• Access to educational streaming services like Pluralsight
• Input on the development of the company

Our core values:
We are open-minded, humble, respectful, self-driven, and honest, which allows us to create an atmosphere of synergy. Our team is a great fit for those who value self-organization and are passionate about personal growth. If this resonates with you, we’d love to have you join the team.

Your future responsibilities:

• Own the architecture of the authorization platform end-to-end — from design through production operations
• Design and implement sidecar-based authorization mechanisms and policy enforcement engines
• Define authorization models (RBAC, ABAC, ReBAC) and translate business requirements into enforceable policies
• Drive technical decisions on authorization infrastructure — evaluate, select, and integrate tools (OpenFGA, OPA, SpiceDB, etc.)
• Design token exchange and delegation flows (OAuth 2.0 OBO, Keycloak token exchange) for multi-service authorization
• Collaborate with platform, security, and product teams to define access control policies and architectural standards
• Mentor and enable other engineering teams on secure authorization patterns and integration best practices
• Own CI/CD pipelines and infrastructure as code for authorization services — ensuring reliability, observability, and fast delivery
• Lead incident response for authorization-related issues — troubleshoot, resolve, and drive root-cause improvements
• Contribute to technical strategy — ADRs, RFCs, technical documentation, and knowledge sharing across teams
• Leverage AI tools and automation to accelerate development, reduce toil, and improve code quality

Your skills and experience:

• 5+ years of professional Golang development
• Expert-level understanding of Go concurrency patterns, interfaces, and idiomatic Go
• Deep knowledge of authorization models and systems (RBAC, ABAC, ReBAC, Zanzibar-style)
• Hands-on experience with policy engines (OPA/Rego, OpenFGA, or similar)
• Experience designing and operating sidecar-based authorization at scale
• Strong understanding of OAuth 2.0 / OIDC flows, token exchange, and identity federation (Keycloak or similar IdP)
• Experience with PostgreSQL and data modeling for access control
• Ability to design systems for high availability, low latency, and horizontal scalability
• Practical use of AI-assisted development tools (GitHub Copilot, Claude, Cursor, etc.
• Advanced Kubernetes experience (operators, CRDs, admission webhooks, troubleshooting at cluster level)
• Experience designing and maintaining CI/CD pipelines (GitHub Actions)
• Proficiency with ArgoCD for GitOps-based continuous delivery
• Experience authoring and managing Helm charts for complex deployments
• Infrastructure as code with Terraform/Terragrunt — including module design and state management
• Observability setup for authorization services (metrics, tracing, alerting)

Nice to Have

• Experience with Google Zanzibar-inspired systems (OpenFGA, SpiceDB, Authzed) in production
• Experience with service mesh (Istio/Envoy) and integrating authorization at the mesh layer
• Familiarity with MCP (Model Context Protocol) or/and agent-based architectures and their authorization challenges
• Background in platform engineering or developer experience
• Experience with security auditing, compliance standards, or regulated environments (banking/fintech)
• Experience designing multi-tenant authorization with delegation patterns
• Contributions to open-source authorization tooling
• Experience automating workflows with AI-powered tools or building internal developer tooling

We offer what matters most to you:

• Competitive salary: we guarantee a stable income and annual bonuses for your personal contribution. Additionally, we have a referral reward program for attracting new colleagues to Raiffeisen Bank
• Social package: official employment, 28 days of paid leave, additional “maternity leave” for fathers, and financial assistance for parents upon the birth of children
• Comfortable working conditions: the possibility of a hybrid work format, offices equipped with shelters and generators, provision with modern equipment
• Wellbeing program: all employees have access to medical insurance from the first working day; consultations with a psychologist, nutritionist or lawyer; discount program for sports and shopping; family days for children and adults; massage in the office
• Learning and development: access to over 130 online educational resources; corporate training programs, online library, mentoring program
• A great team: our colleagues are a community where curiosity, talent and innovation are welcomed. We support each other, learn together and grow. You can find like-minded people in over 15 professional communities, reading or sports clubs
• Career opportunities: we encourage advancement within the bank between functions
• Innovation and technology. Infrastructure: AWS, Kubernetes, Docker, GitHub, GitHub actions, ArgoCD, Prometheus, Victoria, Vault, OpenTelemetry, ElasticSearch, Crossplain, Grafana. Languages: Java (main), Python (data), Go (infra, security), Swift (IOS), Kotlin (Andorid)Datastores: Sql-Oracle, PgSql, MsSql, Sybase. Data management: Kafka, AirFlow, Spark, Flink, we develop expertise in AI and actively integrate it into processes
• Support program for defenders: we preserve jobs and pay the average salary to mobilized people. We have a support program for veterans, and the Bank’s veteran community is developing. We are working to raise awareness among managers and teams on the issues of veterans’ return to civilian life. Raiffeisen Bank is recognized as one of the best employers for veterans (Forbes)

______________________________________________________________________

Твої майбутні обов’язки: 

• Повний цикл володіння архітектурою платформи авторизації — від проєктування до підтримки в production
• Проєктування та реалізація sidecar-базованих механізмів авторизації та рушіїв застосування політик
• Визначення моделей авторизації (RBAC, ABAC, ReBAC) і трансформація бізнес-вимог у політики доступу
• Прийняття технічних рішень щодо інфраструктури авторизації — оцінка, вибір та інтеграція інструментів (OpenFGA, OPA, SpiceDB тощо)
• Проєктування потоків обміну токенами та делегування доступу (OAuth 2.0 OBO, Keycloak token exchange) для авторизації між сервісами
• Співпраця з платформеними, security- та product-командами для визначення політик контролю доступу й архітектурних стандартів
• Менторинг інших engineering-команд щодо безпечних патернів авторизації та найкращих практик інтеграції
• Підтримка CI/CD-пайплайнів та infrastructure as code для сервісів авторизації — забезпечення надійності, observability і швидкої доставки змін
• Участь у реагуванні на інциденти, пов’язані з авторизацією — пошук і усунення проблем та аналіз root cause
• Внесок у технічну стратегію — ADR, RFC, технічна документація та обмін знаннями між командами
• Використання AI-інструментів та автоматизації для прискорення розробки, зменшення рутини та покращення якості коду

Твій досвід та навички:

• 5+ років професійної розробки на Golang
• Експертне розуміння concurrency patterns, interfaces та idiomatic Go
• Глибокі знання моделей та систем авторизації (RBAC, ABAC, ReBAC, Zanzibar-style)
• Практичний досвід роботи з policy engines (OPA/Rego, OpenFGA або аналогічними)
• Досвід проєктування та експлуатації sidecar-based authorization у масштабованих системах
• Сильне розуміння OAuth 2.0 / OIDC flows, token exchange та identity federation (Keycloak або інший IdP)
• Досвід роботи з PostgreSQL та моделюванням даних для систем контролю доступу
• Вміння проєктувати системи з високою доступністю, низькою затримкою та горизонтальним масштабуванням
• Практичний досвід використання AI-assisted development tools (GitHub Copilot, Claude, Cursor тощо)
• Просунутий досвід роботи з Kubernetes (operators, CRDs, admission webhooks, troubleshooting на рівні кластера)
• Досвід створення та підтримки CI/CD-пайплайнів (GitHub Actions)
• Впевнене використання ArgoCD для GitOps-based continuous delivery
• Досвід написання та підтримки Helm charts для складних деплойментів
• Infrastructure as code з Terraform/Terragrunt — включно з дизайном модулів і керуванням state
• Налаштування observability для сервісів авторизації (метрики, tracing, alerting)

Буде плюсом:

• Досвід роботи з системами на основі Google Zanzibar (OpenFGA, SpiceDB, Authzed) у production
• Досвід роботи із service mesh (Istio/Envoy) та інтеграції авторизації на рівні mesh
• Знайомство з MCP (Model Context Protocol) та/або agent-based architectures і пов’язаними викликами авторизації
• Досвід у platform engineering або developer experience
• Досвід security auditing, роботи з compliance standards або регульованими середовищами (banking/fintech)
• Досвід проєктування multi-tenant authorization із delegation patterns
• Внесок у open-source інструменти авторизації
• Досвід автоматизації workflow за допомогою AI-powered tools або створення внутрішніх developer tools

Пропонуємо те, що має значення саме для тебе: 

• Конкурентна заробітна плата: гарантуємо стабільний дохід та річні бонуси за твій особистий внесок. Додатково, у нас діє реферальна програма винагороди за залучення нових колег до Райффайзен Банку
• Соціальний пакет: офіційне працевлаштування, 28 днів оплачуваної відпустки, додатковий “декрет” для татусів, та матеріальна допомога для батьків при народженні дітей
• Комфортні умови праці: можливість гібридного формату роботи, офіси забезпеченні укриттями та генераторами, забезпечення сучасною технікою
• Wellbeing програма: для всіх співробітників доступні медичне страхування з першого робочого дня; консультації психолога, нутриціолога чи юриста; дисконт програми на спорт та покупки; family days для дітей та дорослих; масаж в офісі
• Навчання та розвиток: доступ до понад 130 навчальних онлайн-ресурсів; корпоративні навчальні програми, онлайн бібліотека, програма менторства
• Крута команда: наші колеги — це спільнота, де вітаються допитливість, талант та інновації. Ми підтримуємо один одного, вчимося разом та зростаємо. Ти можеш знайти однодумців у понад 15-ти професійних ком’юніті, читацькому чи спортивному клубах
• Кар’єрні можливості: ми заохочуємо просування всередині банку між функціями
• Інновації та технології. Infrastructure: AWS, Kubernetes, Docker, GitHub, GitHub actions, ArgoCD, Prometheus, Victoria, Vault, OpenTelemetry, ElasticSearch, Crossplain, Grafana. Languages: Java (main), Python (data), Go(infra,security), Swift (IOS), Kotlin (Andorid) Datastores: Sql-Oracle, PgSql, MsSql, Sybase. Data management: Kafka, AirFlow, Spark, Flink, розвиваємо експертизу в AI та активно інтегруємо в процеси
• Програма підтримки захисників і захисниць: ми зберігаємо робочі місця та виплачуємо середню заробітну плату мобілізованим. Для ветеранів та ветеранок у нас діє програма підтримки, розвивається ветеранська спільнота Банку. Ми працюємо над підвищенням обізнаності керівників та команд з питань повернення ветеранів до цивільного життя. Райффайзен Банк відзначений як один з найкращих роботодавців для ветеранів (Forbes)

Job Title:

Principal Systems Infrastructure Engineer

Who we are:

Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries.

About the Product:

Our client is a B2B technology company looking for an experienced infrastructure engineer to support and improve its production environments.

This is a hands-on role for someone with strong Linux expertise who enjoys solving complex systems problems, automating operational work, and taking responsibility for service reliability. You will work closely with engineering colleagues to turn technical requirements into infrastructure that is secure, efficient, and straightforward to maintain.

About the Role:

You will manage Linux infrastructure across physical and virtual environments, supporting its full lifecycle - from initial setup and configuration to maintenance, troubleshooting, and recovery.

Alongside day-to-day operations, you will improve automation, strengthen security practices, and help the team make informed decisions about infrastructure design and deployment. The role requires practical engineering judgment, clear communication, and confidence working with changing priorities.

Key Responsibilities:

• Maintain and improve the availability, performance, and security of production Linux systems.
• Develop automation for infrastructure deployment, configuration, maintenance, and recovery.
• Investigate incidents and resolve issues involving servers, operating systems, connectivity, and storage.
• Manage virtualized and containerized environments, selecting configurations appropriate to operational requirements.
• Apply access controls, system hardening, and resource separation to support secure service delivery.
• Collaborate with engineering teams and external service providers on infrastructure changes and maintenance.
• Improve monitoring, technical documentation, and operational procedures.
• Participate in incident response and the team’s on-call rotation.

Required Competence and Skills:

• 8+ years of experience in infrastructure engineering, systems engineering, SRE, or similar roles.
• Strong experience administering Linux in production, including physical server environments.
• Ability to diagnose operating-system and infrastructure issues beyond the application layer.
• Experience using automation to manage multiple servers consistently.
• Proficiency in Python and practical experience with Terraform.
• Working knowledge of virtualization, containers, networking, and storage.
• Experience maintaining systems remotely and restoring service following failures.
• Understanding of infrastructure security, access management, and workload separation.
• Ability to own technical work from planning through implementation and ongoing support.
• Clear English communication and a collaborative approach to problem-solving.

Nice to Have:

• Experience supporting resource-intensive or performance-sensitive applications.
• Background in hosting, data centers, cloud infrastructure, or managed services.
• Familiarity with hardware selection, capacity planning, and performance optimization.
• Experience working across multiple infrastructure environments or service providers.

Why Us:

We provide 20 days of vacation leave per calendar year (plus official national holidays of a country you are based in).

We provide full accounting and legal support in all countries we operate.

We utilize a fully remote work model with a powerful workstation and co-working space in case you need it.

Come Back Agency supports US software and technology companies by running their hiring process. We work with delivery and leadership teams to define roles, screen candidates, and manage interviews. Successful candidates are hired directly by the company and become part of its team.
 

This position is with a US-based software company providing custom development and AI implementation for North American clients. The team builds and maintains production software, including AI-enabled systems, and works in long-term client engagements. Team members operate as part of an internal, distributed team and collaborate directly with client stakeholders.
 

What you will do

• Develop and maintain backend services on Node.js (NestJS, TypeScript)
• Design and build REST APIs working with PostgreSQL and Prisma
• Implement business logic and integrations with third-party services
• Build authentication and authorization flows
• Improve performance and stability of production systems
• Investigate and fix production issues
• Take part in code reviews and technical discussions
• Communicate directly with US-based clients on technical calls
   

What we are looking for

• 2+ years of commercial backend experience with Node.js 
• In-depth NestJS experience on real commercial projects: modules, guards, interceptors, pipes
• Strong TypeScript skills
• Solid approach to validation and DTOs
• Hands-on experience with PostgreSQL and Prisma
• Practical experience with AWS services
• Docker in day-to-day development
• Redis (caching, queues, sessions, or similar use cases)
• Experience with Node.js Streams
• Good understanding of OOP principles
• Confident use of Git
• Experience using Claude Code or readiness to use it as part of your daily workflow
• Ability to work independently and argue for your technical decisions
• English B2+ for confident spoken communication with US clients
• Full-time availability 16:00–00:00 Kyiv time
   

Important: NestJS experience limited to tutorials, courses, or pet projects is not sufficient for this role. We are looking for commercial backend experience; frontend-only profiles will not be considered. Full-stack developers are welcome if most of their practical experience is on the backend.
 

Nice to have

• Express.js
• Other ORMs (TypeORM, Sequelize) or MongoDB
• JWT, OAuth, RBAC
• WebSockets / Socket.io
• Microservices, message queues, background jobs
• Unit and integration testing
• CI/CD, Kubernetes
• Logging and monitoring
• Payment integrations
   

What we offer

• Fully remote, full-time cooperation
• Stable working hours aligned with the US market: 16:00–00:00 Kyiv time
• Direct cooperation with a US-based software company
• Mentorship from the Head of Node.js
• Paid vacation and sick days
• English lessons and speaking clubs
• No time-tracking software
• Structured and personalized onboarding
• Opportunities for professional growth and increased ownership within the team
• Compensation reviews based on performance
   

Hiring process

1. Introductory interview with Come Back Agency
2. Technical interview with the Head of Node.js: a code review session where you’ll discuss code snippets (no live coding)
3. Final culture-fit interview
4. Offer and onboarding
    

When applying, please briefly mention your years of commercial Node.js experience, NestJS projects you’ve worked on, AWS services you’ve used, and your English level.

You can also apply through our website: comeback.ua.

Numerical Technologies LTD is a provider of custom software solutions and services specializing in risk, limits, and regulatory capital. We are currently looking for a Senior Python Developer to join our team. 
 

Project: Portfolio management systems for a US financial institution. 

What you will be doing:  

As part of the team, you will be participating in a client project focused on portfolio management solutions. You will help develop new software features, as well as support and maintain existing ones. You will be writing scalable and fault-tolerant code, debugging programs, and integrating applications with third-party web services. You will be collaborating closely with the client and product manager to understand the system’s functional and non-functional requirements, and contribute to code quality through unit testing, integration testing, code review, and system design using Python to build robust software that aligns with the client’s business needs. 

What we are looking for:  

• A strong programming background with Python and OOP skills.
• Deep understanding of algorithms and data structures.
• Experience building backend systems and working with REST APIs.
• Proficiency with SQL databases.
• Experience with FastAPI and Linux environments.
• Strong problem-solving skills and ability to collaborate effectively in a team environment.
• Upper-Intermediate level of English or above. 
• Experience with AWS is a plus. 

What we offer: 

• Competitive compensation depending on experience and skills. 
• Regular assessments and salary reviews. 
• Paid personal days. 
• Mental health support program. 
• Language classes. 
• Flexible working schedule. 

Vienna onsite, International organization

We're looking for a AI/ML specialist with experience in Computer Vision to work in highly restricted environment.

Important! LLM experience is not relevant to this position, our focus is to track objects in the video stream. 

General requirements:

• Ready for a daily office (up to 24 days per year remote)
• Must either already have a work permit in Austria or be a Ukrainian citizenship who relocated after the beginning of the scale invasion (this is a prerequisite for fast residence permit track)

Mandatory skills (min. 3-5 years of production experience):

• Deep Learning Solutions for processing image data (convolutional networks)
• Knowledge of models for real-time object detection and image segmentation (e.g., YOLO, SAM)
• Major AI software frameworks like PyTorch, TensorFlow and model formats like ONNX
• Design and implementation of data processing pipelines
• Developing complex software packages using Python applying software engineering principles
• Building REST backends to integrate into Enterprise solution
• ClearML or similar platforms for streamlining AI development and deployment

Hiring process:

1. Introductory call (15-30min)
2. Technical interview
3. Occasionally, an additional interview round or technical assignment

Benefits:

• Residence permit obtaining support
• Adaptation, accommodation search support
• Austrian social package
  • 25 days vacation
  • Paid sick leaves

ELEKS Software Engineering and Development Office is looking for a Trainee / Junior PHP Developer in our offices in Ukraine.

Our project is a German event management and marketing platform that helps customers create events with different ticket categories, sell tickets, analyze event performance, and collect feedback from organizers.
Our client works with large companies that organize conferences, trade fairs, and other corporate events.

REQUIREMENTS

• Understanding of programming fundamentals and how software is built 
• Basic knowledge of PHP 8.4 and object-oriented programming; hands-on PHP experience is a plus but not mandatory
• Openness to learning PHP with Laminas or writing backend code in Node.js
• Basic understanding of relational databases and SQL; familiarity with MySQL 8.4 or PostgreSQL 14
• Basic understanding of REST APIs
• Familiarity with Git and Composer
• Some hands-on experience with AI tools for software development
• Ability to use AI thoughtfully: define tasks and acceptance criteria, review and test AI-generated output, and refine it where needed rather than copying it without verification
• Interest in a full-stack role and willingness to work across both backend and frontend development
• Upper-Intermediate level of English

WOULD BE A PLUS

• Familiarity with TypeScript and Angular 21
• Experience with PHP or another backend language
• Basic knowledge of Docker
• Familiarity with PHPUnit and test writing
• Interest in AWS services such as S3 or SQS
• Basic knowledge of NoSQL databases, such as DynamoDB
• Familiarity with Swagger/OpenAPI, Propel ORM, or microservices
• Experience working with third-party APIs, such as PayPal or Google Analytics

RESPONSIBILITIES

• Conduct a simple range of programming tasks including analysis, coding, and debugging of complex program logic 
• Conduct test procedures by using testing, and debugging programs
• Develop algorithms according to technical specifications or other requirements documentation
• Use standard algorithms in the applicable cases
• Write program code according to the defined application architecture 
• Structure and format source code, comment and mark up the code, as well as name variables, functions, classes, data structures, and files according to the company conventions and industry best practices
• Track changes, compare source code in the defined version control system

• Agree task deadlines with Senior Developer or Technical Leader

   

WHAT YOU WILL GET WITH ELEKS 

• Close cooperation with a customer 
• Challenging tasks 
• Competence development 
• Team of professionals 
• Dynamic environment with a low level of bureaucracy