Jobs Backend

About the project

Our client is a fintech company building a new digital banking and payments product from scratch. The platform is built by several stream teams: core banking (accounts, ledgers, lending), payments and open banking, cards, financial crime (KYC, fraud, transaction monitoring) and customer engagement.

You will work in one of the stream teams – which one depends on your domain experience – building its services, APIs and integrations with banking, payment and compliance providers.

The product is at an early stage: architecture, team and roadmap are being shaped now, and the scope will be refined together with the team. You will join a mixed team of client and NerdySoft engineers. AI-assisted development is part of everyday engineering.

What you will do

• Build backend services for a new digital banking platform and take them to production
• Own the technical design of features and components, and contribute to architecture decisions together with the Tech Lead
• Design and build your stream's APIs (REST / GraphQL) and reliable integrations with banking, payment and compliance providers - idempotent, traceable and easy to reconcile
• Keep the bar for quality: code reviews, testing standards, performance and reliability
• Mentor middle engineers and share knowledge within the team
• Work with AI coding assistants and AI agents in daily development: delegate tasks to agents, review the code they produce and keep it to the team's standards for review and testing
• Build AI-powered product features together with the team, e.g. customer-facing chatbots, document recognition and checks, back-office workflows
• Make security part of the design, including PCI DSS requirements where relevant
• Support features in production: monitoring, incident analysis, fixes
• Clarify requirements and discuss technical solutions directly with client stakeholders

What you bring

• 5+ years of commercial backend development, including 3+ years with Node.js and TypeScript
• FinTech experience in at least one of these areas:
  • Core banking: accounts, ledgers, lending
  • Payments: banking rails, open banking
  • Cards: 3DS, digital wallets
  • Financial crime: KYC, AML screening, fraud, transaction monitoring
  • Customer engagement: notifications, marketing tech, AI assistants
• Experience with asynchronous processing: message queues, background jobs, event-driven patterns (Kafka, RabbitMQ, AWS SNS/SQS or similar)
• Strong PostgreSQL (or other relational DB) skills: schema design, transactions, query optimisation
• API design (REST, GraphQL) and integrations with external providers: retries, timeouts, idempotency, consistent error handling
• Architecture know-how: microservices, DDD, Clean or Hexagonal architecture
• Strong testing culture and secure coding: unit, integration and contract tests (Jest or Vitest, Testcontainers, Pact)
• Hands-on AWS (or another major cloud), Docker and CI/CD
• Daily use of AI coding assistants and agents (Claude Code, Cursor, GitHub Copilot or similar): you can show how they speed you up and how you check their output
• English B2+ (Upper-Intermediate or higher): you will discuss technical solutions directly with the client

Nice to have

• Full-stack experience: React and TypeScript on the front end
• NestJS; Next.js
• Hands-on work with a vendor core banking platform or a BaaS provider
• Open banking (payment initiation, account information) and instant / domestic payment rails
• Ledger systems and double-entry accounting
• LLM-based features in production: chatbots, document recognition, RAG
• PCI DSS; API security (OAuth2 / OIDC / JWT)
• Kubernetes, infrastructure as code (Terraform or similar)
• Work in a regulated financial environment

What we offer

• Comfortable workplace and modern office facilities
• Flexible working hours with no overtime and the ability to work remotely
• 50% compensation for certifications, conferences, training
• 50% compensation for English courses
• 18 working days of paid annual leave
• Paid sick leave
• Medical insurance and sports compensation

SBC Performance drives scalable growth for brands ready to expand globally.

Working across eCommerce, health & wellness, education, and entertainment, our team helps brands acquire customers faster and scale across 26+ global markets. We combine data-driven paid media, performance creative, and advanced analytics to turn marketing into a predictable revenue engine.
 

Scale faster. Grow smarter.

Right now, we’re looking for a Senior Go Developer to join our Product & Engineering Team and help build a scalable lead generation platform.
 

Key Responsibilities:

• Break business cases into well-scoped tasks and deliver them end to end.
• Build features in an AI-first workflow, guiding AI tools toward the right solution.
• Make architectural decisions and keep code quality high through thorough code review.
• Design and evolve backend services and the overall platform architecture.
• Work with PostgreSQL: data modeling, query optimization, migrations.
• Collaborate with marketing and product teams to understand how traffic is acquired and monetized.
   

Requirements:

• 4+ years of commercial backend development experience
• Experience with Go, or a strong background in another backend language and readiness to work in Go
• Hands-on experience with PostgreSQL
• Deep understanding of software architecture: SOLID, GRASP, design patterns, and development approaches
• Comfortable working with AI coding tools and critically evaluating generated code
• English level of B2 or higher
   

Nice to Have:

• Experience in marketing, AdTech, or lead generation
   

What We Offer

• Fully remote work
• Competitive compensation
• Flexible working hours: we start our operation day between 9:00 - 11:00 CET
• All necessary equipment
• Paid vacation and sick leaves
• Company events and multiple internal activities
• Open feedback and transparent direct communication

GR8_TECH builds B2B iGaming platforms for operators who play to lead.

We deliver full-cycle, high-impact tech designed to scale — from seamless integrations and expert consulting to long-term operational support. Our platform powers millions of active players and drives real business growth. Call it what it is: the iGaming Platform for Champions.

With 1000+ GR8 people across locations and time zones, we don’t just ship technology — we help operators build success stories across brands, markets, and geos.

Our ambition drives us. Our people make it real.

If you’re a challenger in spirit and a champion in action — join us.
 

Why this role exists:

This role exists to design, develop, and maintain scalable .NET systems for the Payments Team. It ensures high performance, resilience, and alignment with business objectives while mentoring engineers and improving development practices.
 

What you’ll drive:

System design and architecture

• Designing and implementing scalable, resilient, and efficient software architectures using microservices, event-driven, and cloud-native approaches.

Development and code quality

• Writing, testing, and debugging complex code for new and existing applications.
• Conducting code reviews to ensure quality, security, and adherence to best practices.
• Delivering production-ready code in a timely manner.

Mentorship and collaboration

• Providing guidance and mentoring junior engineers and team members.
• Collaborating with cross-functional teams, including product management, design, and operations, to align development efforts with business goals.

Continuous improvement and research

• Researching and implementing new technologies and methodologies to improve software performance and processes.
• Identifying and resolving complex software issues and technical challenges.
• Driving continuous improvement in development practices.

Communication and documentation

• Creating and maintaining comprehensive technical documentation.
• Communicating effectively with stakeholders, presenting technical concepts and project updates.
   

What makes you a GR8 fit:

Must-have

• Strong experience in designing scalable and resilient .NET systems (microservices, event-driven, cloud-native).
• Advanced C# skills, RESTful API development, asynchronous programming, and mastery of design/resilience patterns (DDD, CQRS, circuit breaker, etc.).
• Proficiency in SQL optimization, data modeling, indexing, and experience with relational and NoSQL databases.
• Hands-on experience with Kafka, high-load system optimization, caching, and distributed computing.
• Solid experience with CI/CD pipelines, Docker/Kubernetes, and infrastructure automation.
• Strong focus on testing (xUnit, NUnit), monitoring (Serilog, App Insights), and secure coding practices.
• Proven experience mentoring peers and driving technical decisions in Agile teams.
• Upper-Intermediate+ English, B2+ Ukrainian/Russian.

Nice-to-have

• Experience leading or managing software development projects.
• Familiarity with cloud platforms (Azure, AWS, GCP) and cloud-native service design.
• Experience improving software development practices and SDLC processes.
   

Why you’ll love working here:

Benefits Cafeteria — annual budget you allocate to:

• Sports • Medical • Mental health • Home office • Languages.
   

Work-life & support

• Paid maternity/paternity leave + monthly childcare allowance.
• 20+ vacation days, unlimited sick leave, emergency time off.
• Remote-first + tech support + coworking compensation.
• Team events (online/offline/offsite).
• Learning culture with internal courses + growth programs.
   

Our culture & core values:

GR8_TECH culture is how we win — through trust, ownership, and a growth mindset. We move fast, stay curious, and keep it real, with open feedback, room to experiment, and a team that’s got your back.
 

FUELLED BY TRUST: we’re open, honest, and have each other’s backs.

OWN YOUR GAME: we take initiative and own what we do.

ACCELER8: we move fast, focus smart, and keep it simple.

CHALLENGE ACCEPTED: we grow through challenges and stay curious.

BULLETPROOF: we’re resilient, ready, and always have a plan.

TheTop builds TheEngine, an AI product for companies that want clear, cost-efficient and well-governed use of AI. Our core team builds a high-quality, flexible product.

Now we're launching a Forward Deployed Engineering team, with one engineer already on board. Customers increasingly want an expert who sets the product up inside their company instead of figuring it out alone. That's where the market is going, and we're building for it.

What you'll do

• Own the product for your customers end to end as an Applied AI Engineer: about 90% backend, 10% or less frontend (simple and easy to customise)
• Deploy and adapt TheEngine to each customer's setup and needs
• Talk to customers, understand their business, and turn it into working solutions
• Work with the core team on how to make the product better, more flexible and easier to deliver and customise
• Code as much as before, or more, with AI agents doing a lot of the typing

You won't be alone: every FDE works with a product partner from our team.

What matters to us

• 3+ years of commercial engineering experience (Python)
• Fluent technical English and conversational English good enough for customer calls
• Availability until 3–4 PM US Eastern Time
• You understand the business side, not only the code, and you get corporate and US business culture
• Independence and an entrepreneurial attitude
• Easy to talk to and enjoy working with people
• You love IT and AI, not just the paycheck
• You want to go deeper into the product, learn new things and talk to people a bit more than before

Nice to have

• Past experience as an IT entrepreneur or founder

How to apply

Send your CV, your salary expectation and a few lines on what you've built with AI and why this role interests you.

GR8_TECH builds B2B iGaming platforms for operators who play to lead.

We deliver full-cycle, high-impact tech designed to scale — from seamless integrations and expert consulting to long-term operational support. Our platform powers millions of active players and drives real business growth. Call it what it is: the iGaming Platform for Champions.

With 1000+ GR8 people across locations and time zones, we don’t just ship technology — we help operators build success stories across brands, markets, and geos.

Our ambition drives us. Our people make it real.

If you’re a challenger in spirit and a champion in action — join us.

Why this role exists:

This role exists to design, develop, and maintain scalable .NET systems for the Sport Math Team. It ensures high performance, resilience, and alignment with business objectives while mentoring engineers and improving development practices.

What you’ll drive:

System design and architecture

• Designing and implementing scalable, resilient, and efficient software architectures using microservices, event-driven, and cloud-native approaches.

Development and code quality

• Writing, testing, and debugging complex code for new and existing applications.
• Conducting code reviews to ensure quality, security, and adherence to best practices.
• Delivering production-ready code in a timely manner.

Mentorship and collaboration

• Providing guidance and mentoring junior engineers and team members.
• Collaborating with cross-functional teams, including product management, design, and operations, to align development efforts with business goals.

Continuous improvement and research

• Researching and implementing new technologies and methodologies to improve software performance and processes.
• Identifying and resolving complex software issues and technical challenges.
• Driving continuous improvement in development practices.

Communication and documentation

• Creating and maintaining comprehensive technical documentation.

• Communicating effectively with stakeholders, presenting technical concepts and project updates.

   

What makes you a GR8 fit:

Must-have

• Strong experience in designing scalable and resilient .NET systems (microservices, event-driven, cloud-native).
• Advanced C# skills, RESTful API development, asynchronous programming, and mastery of design/resilience patterns (DDD, CQRS, circuit breaker, etc.).
• Proficiency in SQL optimization, data modeling, indexing, and experience with relational and NoSQL databases.
• Hands-on experience with Kafka, high-load system optimization, caching, and distributed computing.
• Solid experience with CI/CD pipelines, Docker/Kubernetes, and infrastructure automation.
• Strong focus on testing (xUnit, NUnit), monitoring (Serilog, App Insights), and secure coding practices.
• Proven experience mentoring peers and driving technical decisions in Agile teams.
• Upper-Intermediate+ English, B2+ Ukrainian/Russian.

Nice-to-have

• Experience leading or managing software development projects.
• Familiarity with cloud platforms (Azure, AWS, GCP) and cloud-native service design.

• Experience improving software development practices and SDLC processes.

   

Why you’ll love working here:

Benefits Cafeteria — annual budget you allocate to:

• Sports • Medical • Mental health • Home office • Languages.

   

Work-life & support

• Paid maternity/paternity leave + monthly childcare allowance.
• 20+ vacation days, unlimited sick leave, emergency time off.
• Remote-first + tech support + coworking compensation.
• Team events (online/offline/offsite).

• Learning culture with internal courses + growth programs.

   

Our culture & core values:

GR8_TECH culture is how we win — through trust, ownership, and a growth mindset. We move fast, stay curious, and keep it real, with open feedback, room to experiment, and a team that’s got your back.

FUELLED BY TRUST: we’re open, honest, and have each other’s backs.

OWN YOUR GAME: we take initiative and own what we do.

ACCELER8: we move fast, focus smart, and keep it simple.

CHALLENGE ACCEPTED: we grow through challenges and stay curious.

BULLETPROOF: we’re resilient, ready, and always have a plan.

About the role

Gogloby is hiring a Junior Software Developer to work on products for gogloby.com using cutting-edge AI technology. You will spend 100% of your working time on hands-on software development, supported by a small team and an AI-first development process.

Recent graduates are welcome. The role is designed for someone with strong fundamentals, visible energy, curiosity, and the discipline to grow quickly through real product work.

What you will do

• Design, build, test, debug, and maintain production software using Python and JavaScript.
• Work across backend, frontend, databases, and API integrations according to product priorities.
• Use AI development tools such as Claude Code, Cursor, and GitHub Copilot as part of the daily engineering workflow.
• Write and refine prompts that help generate, review, troubleshoot, and improve code.
• Contribute to products built with REST APIs, relational databases, and both monolithic and microservices-oriented architectures.
• Investigate issues independently, ask useful questions, and bring possible solutions or new ideas to the team.
• Handle changing priorities and parallel tasks without losing ownership, communication, or delivery discipline.
• Collaborate transparently in a small, fully remote startup team.

Required qualifications

• Education: Bachelor's degree (Bc.) or higher in Computer Science.
• Experience: 1+ year of professional software development experience. Recent graduates are encouraged to apply.
• Core languages: Working knowledge of Python and JavaScript.
• Software fundamentals: Understanding of SQL, relational databases, REST APIs, and the concepts behind monoliths and microservices.
• AI-first development: Comfort using AI coding assistants and following an AI-first software development process.
• Prompt engineering: Ability to write clear, structured prompts and iterate based on results.
• English: Strong spoken and written English for daily remote collaboration.
• Work habits: Discipline, punctuality, openness, transparency, teamwork, and a strong desire to study and improve.
• Availability: Ability to commit to a full-time, 40-hour workweek without conflicting employment obligations.

Nice to have

• Experience with Java, React, Next.js, or Node.js.
• Personal, university, open-source, or pet projects related to AI.
• A portfolio, GitHub profile, demo, or technical write-up showing what you have built and learned.
• Experience shipping a small project end to end, even outside formal employment.

Compensation and working conditions

• Compensation in USD
• Fully remote from Ukraine
• Unlimited PTO, coordinated with the team
• Startup pace, changing priorities, small team, high learning curve

Job Description

Role Summary: Drive the design, implementation, and enhancement of mission-critical Control Plane APIs and distributed backend services powering core cloud networking. This role focuses on scaling high-throughput API endpoints, IPAM, VPC, and orchestration workflows within an asynchronous Python backend stack, requiring an engineer who can ramp up rapidly in an unfamiliar codebase and deliver production-grade features within an agile, evolving architecture.

Requirements:

• Bachelor’s degree in Computer Science, Computer Engineering, or equivalent practical experience.
• 5+ years of production experience in backend software engineering for distributed systems and control plane platforms.
• Strong proficiency in Python and its ecosystem, with hands-on experience in Flask, SQLAlchemy, Celery, Redis, and MySQL.
• Strong foundation in core Internet and networking fundamentals: TCP/IP, IPv4 (DHCP), IPv6 (DHCPv6), DNS / rDNS, HTTP, BGP, and ICMP.
• Working knowledge of cloud infrastructure primitives: Virtual Private Cloud (VPC), IP Address Management (IPAM), IAM, Observability, and Billing.
• Proven track record of independently navigating complex, legacy, or partially documented codebases, delivering meaningful contributions within the first 4–6 weeks.
• Rigorous written communication and documentation hygiene: writing thorough pull request descriptions, architecture decision records, clear READMEs, and structured handoff documentation.
• Time zone flexibility with sufficient working overlap during US Eastern Time (ET) business hours.

Nice to have:

• Hands-on experience with modern observability stacks: OpenTelemetry (OTEL), Grafana, Loki, and VictoriaMetrics.
• Exposure to configuration management platforms (particularly SaltStack).
• Experience with distributed task queues, event-driven architectures, and high-availability database replication.
• Practical experience leveraging modern AI developer tools (GitHub Copilot, Claude, Gemini) to accelerate testing, code quality, and delivery cycles.

Job Responsibilities

• Design, build, test, and maintain robust, high-performance Control Plane APIs and background task pipelines using Flask, SQLAlchemy, Celery, and Redis.
• Implement core cloud networking functionalities across IPAM allocation engines, VPC routing interfaces, and multi-tenant billing/IAM boundaries.
• Troubleshoot and resolve concurrency, latency, and consistency issues across distributed MySQL and Redis backends.
• Establish clear system documentation, updating architectural sources of truth, internal runbooks, and API specifications to ensure frictionless handoffs.
• Communicate status, blockers, and architectural trade-offs proactively and asynchronously through structured status updates and detailed PR descriptions.
• Adapt to evolving project milestones and shift across multiple concurrent workstreams without losing delivery momentum.

Department/Project Description

Join the Athena Platform Networking Team dedicated to building and scaling the next generation of global cloud infrastructure control plane APIs. In this role, you will be directly responsible for the backend services that manage compute connectivity, network provisioning, and cloud resource management, delivering resilient, highly available software in a dynamic distributed systems environment.

Skill Category

Must have:

• GCP: advanced deployment and administration of PaaS and IaaS services (Compute Engine, Cloud Run, Cloud Functions, Cloud SQL, Cloud Storage, BigQuery)
• Azure DevOps: strong working knowledge of ADO in an enterprise setting (pipelines, branching, PRs, projects, Terraform module development)
• Scripting: Terraform, Bash, Python, gcloud CLI, PowerShell, YAML
• Identity and security: Cloud IAM, service accounts, Workload Identity Federation, Cloud Identity federated with Entra ID, Secret Manager, Cloud KMS, Security Command Center
• Basic networking skills: VPC, Shared VPC, Cloud NAT, Cloud VPN and Interconnect, Private Service Connect
• Containerization: GKE (Standard and Autopilot) and Artifact Registry
• AI: Vertex AI, Gemini models and Vertex AI Agent Builder
• Multi-cloud awareness: a working understanding of AWS or Azure

Nice to have:

• Cloud Build or GitHub Actions
• Landing zones and resource hierarchy: organization, folders and projects, Organization Policy constraints, Google Cloud Foundation or Fabric Terraform blueprints
• Backstage.io

Job Responsibilities

Design, build, and maintain scalable, highly available PaaS and IaaS infrastructure across GCP and other cloud environments in alignment with enterprise architectural standards.

Architect and maintain enterprise Azure DevOps (ADO) environments, including pipeline optimization, branching strategies, PR governance, and custom Terraform module development.

Develop, test, and deploy modular IaC configurations using Terraform, PowerShell, Bash, Python, and cloud CLIs to enforce multi-region consistency.

Manage, secure, and scale enterprise Kubernetes clusters across GKE nvironments.

Deploy, configure, and operate cloud AI services using Vertex AI to support enterprise LLM integrations and GenAI workloads.

Manage core networking components, including VPC, Shared VPC, Cloud NAT, Cloud VPN and Interconnect, Private Service Connect.

Support multi-account enterprise governance.

Establish monitoring, observability, and automated remediation patterns across hybrid cloud assets.

Department/Project Description

Join global Technology & Transformation organization, a cross-functional team driving the next generation of enterprise insurance solutions. We are building and scaling a flagship multi-tenant insurance platform featuring integrated e-billing, real-time analytics, and automated claims workflows servicing thousands of global clients.

We are seeking an experienced Senior Cloud GCP Engineer to scale and secure our infrastructure. You will drive cloud automation across GCP and other clouds, writing clean Terraform, Python, and Bash code to streamline deployments, enhance system reliability, and automate day-to-day operations.

Description

Join global Technology & Transformation organization, a cross-functional team driving the next generation of enterprise insurance solutions. We are building and scaling a flagship multi-tenant insurance platform featuring integrated e-billing, real-time analytics, and automated claims workflows servicing thousands of global clients.

We are seeking an experienced Senior Cloud GCP Engineer to scale and secure our infrastructure. You will drive cloud automation across GCP and other clouds, writing clean Terraform, Python, and Bash code to streamline deployments, enhance system reliability, and automate day-to-day operations.

Requirements

Must have:

• GCP: advanced deployment and administration of PaaS and IaaS services (Compute Engine, Cloud Run, Cloud Functions, Cloud SQL, Cloud Storage, BigQuery)
• Azure DevOps: strong working knowledge of ADO in an enterprise setting (pipelines, branching, PRs, projects, Terraform module development)
• Scripting: Terraform, Bash, Python, gcloud CLI, PowerShell, YAML
• Identity and security: Cloud IAM, service accounts, Workload Identity Federation, Cloud Identity federated with Entra ID, Secret Manager, Cloud KMS, Security Command Center
• Basic networking skills: VPC, Shared VPC, Cloud NAT, Cloud VPN and Interconnect, Private Service Connect
• Containerization: GKE (Standard and Autopilot) and Artifact Registry
• AI: Vertex AI, Gemini models and Vertex AI Agent Builder
• Multi-cloud awareness: a working understanding of AWS or Azure

Nice to have:

• Cloud Build or GitHub Actions
• Landing zones and resource hierarchy: organization, folders and projects, Organization Policy constraints, Google Cloud Foundation or Fabric Terraform blueprints
• Backstage.io

Job responsibilities

Design, build, and maintain scalable, highly available PaaS and IaaS infrastructure across GCP and other cloud environments in alignment with enterprise architectural standards.

Architect and maintain enterprise Azure DevOps (ADO) environments, including pipeline optimization, branching strategies, PR governance, and custom Terraform module development.

Develop, test, and deploy modular IaC configurations using Terraform, PowerShell, Bash, Python, and cloud CLIs to enforce multi-region consistency.

Manage, secure, and scale enterprise Kubernetes clusters across GKE nvironments.

Deploy, configure, and operate cloud AI services using Vertex AI to support enterprise LLM integrations and GenAI workloads.

Manage core networking components, including VPC, Shared VPC, Cloud NAT, Cloud VPN and Interconnect, Private Service Connect.

Support multi-account enterprise governance.

Establish monitoring, observability, and automated remediation patterns across hybrid cloud assets.

Company Description
 

Join Sigma Software as a Principal Software Engineer and help shape secure, large-scale digital platforms for Public Sector initiatives. This is a strategic senior-level role for an experienced engineering leader who can combine hands-on development, architecture expertise, technical leadership, and customer-facing communication.
 

You will work with enterprise-grade Java-based solutions, participate in presales and discovery activities, define technical strategies, and guide teams through project launch and early delivery stages.
 

We at Sigma Software create impactful solutions for global Customers and support our engineers with professional growth opportunities, mature engineering culture, and the ability to influence projects from the earliest stages.
 

CUSTOMER

Our Customers operate within Public Sector environment where security, reliability, scalability, and regulatory compliance are critical. The projects focus on building and modernizing enterprise digital services that support mission-critical operations, complex integrations, and long-term maintainability for large-scale organizations.
 

PROJECT

You will join early-stage initiatives where technical leadership plays a key role in transforming business ideas into scalable implementation strategies. The position involves participation in presales activities, tenders, discovery workshops, architecture design, estimation, and project launch support.

The projects include enterprise Java ecosystems, cloud-native infrastructure, distributed systems, secure integrations, and modernization of legacy platforms. You will work closely with Customers, Sales, Delivery, and engineering teams to establish architecture standards and ensure successful project initiation.

Responsibilities:

• Participate in presales activities, discovery sessions, technical workshops, tenders, and RFI/RFP analysis.
• Translate business requirements into scalable technical solutions and implementation strategies.
• Design enterprise-level architectures for Java-based distributed systems and microservices platforms.
• Prepare technical proposals, estimations, architecture diagrams, delivery assumptions, and implementation roadmaps.
• Define technology stack, infrastructure approach, integrations, security principles, and team composition.
• Present and defend technical solutions during Customer discussions and stakeholder meetings.
• Support Sales and Delivery teams during presales and project initiation phases.
• Lead technical project start-up activities and transform high-level concepts into actionable implementation plans.
• Establish architecture standards, engineering guidelines, and development best practices.
• Guide engineering teams during the first delivery stages and support onboarding and technical interviews.
• Conduct architecture and code reviews to ensure scalability, maintainability, and security compliance.
• Resolve complex technical challenges and mentor Senior and Lead Engineers.
• Drive technical decision-making while balancing business goals, delivery timelines, and quality expectations.

Requirements:

• 5+ years of software engineering experience with strong technical leadership responsibilities.
• Strong hands-on expertise in Java ecosystem development.
• Deep knowledge of Spring and Spring Boot.
• Strong understanding of microservices and distributed systems architecture.
• Experience designing and implementing REST APIs and event-driven systems.
• Practical experience with Kafka or similar messaging technologies.
• Experience with relational and NoSQL databases.
• Strong cloud platform experience with AWS, Azure, or GCP.
• Experience with Docker, Kubernetes, CI/CD pipelines, and infrastructure automation.
• Understanding of application security, monitoring, logging, and observability practices.
• Experience working with incomplete or ambiguous requirements and converting them into technical solutions.
• Experience participating in presales, discovery phases, solution proposals, or tender processes.
• Strong estimation and solution design skills.
• Excellent Customer-facing communication and presentation skills.
• Ability to independently drive technical initiatives and take ownership.
• Upper - Intermediate English level.

Приєднуйтесь до Sigma Software на позицію Principal Software Engineer та допомагайте створювати безпечні цифрові платформи великого масштабу для ініціатив у сфері Public Sector. Це стратегічна позиція senior-рівня для досвідченого інженерного лідера, який може поєднувати розробку, архітектурну експертизу, технічне лідерство та комунікацію з клієнтами.
 

Ви працюватимете з enterprise-рішеннями на базі Java, братимете участь у presales та discovery-активностях, визначатимете технічні стратегії та супроводжуватимете команди під час запуску проєктів і на ранніх етапах реалізації.

У Sigma Software ми створюємо значущі рішення для глобальних Клієнтів та підтримуємо наших інженерів можливостями професійного розвитку, зрілою інженерною культурою та можливістю впливати на проєкти з найперших етапів.
 

КЛІЄНТ

Наші Клієнти працюють у сфері Public Sector, де безпека, надійність, масштабованість та відповідність нормативним вимогам мають критичне значення. Проєкти зосереджені на створенні та модернізації enterprise-цифрових сервісів, які підтримують критично важливі операції, складні інтеграції та довгострокову підтримуваність для великих організацій.

ПРОЄКТ

Ви приєднаєтесь до ініціатив на ранніх етапах, де технічне лідерство відіграє ключову роль у перетворенні бізнес-ідей на масштабовані стратегії реалізації. Позиція передбачає участь у presales-активностях, тендерах, discovery-воркшопах, проєктуванні архітектури, оцінюванні та підтримці запуску проєктів.

Проєкти включають enterprise Java-екосистеми, cloud-native інфраструктуру, розподілені системи, безпечні інтеграції та модернізацію legacy-платформ. Ви тісно співпрацюватимете з Клієнтами, Sales, Delivery та інженерними командами для встановлення архітектурних стандартів та забезпечення успішного запуску проєктів.

Обов’язки:

• Брати участь у presales-активностях, discovery-сесіях, технічних воркшопах, тендерах та аналізі RFI/RFP.
• Перетворювати бізнес-вимоги на масштабовані технічні рішення та стратегії реалізації.
• Проєктувати архітектуру enterprise-рівня для розподілених систем та мікросервісних платформ на базі Java.
• Готувати технічні пропозиції, оцінки, архітектурні діаграми, припущення щодо реалізації та дорожні карти.
• Визначати технологічний стек, підхід до інфраструктури, інтеграції, принципи безпеки та склад команди.
• Презентувати та захищати технічні рішення під час обговорень із Клієнтами та зустрічей зі стейкхолдерами.
• Підтримувати Sales та Delivery команди під час presales та етапів запуску проєктів.
• Керувати технічними активностями на старті проєкту та перетворювати високорівневі концепції на практичні плани реалізації.
• Встановлювати архітектурні стандарти, інженерні рекомендації та найкращі практики розробки.
• Керувати інженерними командами на перших етапах реалізації та підтримувати онбординг і технічні інтерв’ю.
• Проводити архітектурні та code review для забезпечення масштабованості, підтримуваності та відповідності вимогам безпеки.
• Вирішувати складні технічні завдання та менторити Senior і Lead Engineers.
• Керувати процесом прийняття технічних рішень, балансуючи бізнес-цілі, терміни реалізації та очікування щодо якості.

Вимоги:

• 5+ років досвіду у software engineering із сильними обов’язками у сфері технічного лідерства.
• Сильна практична експертиза у розробці в Java-екосистемі.
• Глибокі знання Spring та Spring Boot.
• Глибоке розуміння архітектури мікросервісів та розподілених систем.
• Досвід проєктування та реалізації REST API та event-driven систем.
• Практичний досвід роботи з Kafka або аналогічними технологіями обміну повідомленнями.
• Досвід роботи з реляційними та NoSQL базами даних.
• Сильний досвід роботи з хмарними платформами AWS, Azure або GCP.
• Досвід роботи з Docker, Kubernetes, CI/CD pipeline та автоматизацією інфраструктури.
• Розуміння безпеки застосунків, моніторингу, логування та практик observability.
• Досвід роботи з неповними або неоднозначними вимогами та перетворення їх на технічні рішення.
• Досвід участі у presales, discovery-фазах, підготовці solution proposals або тендерних процесах.
• Сильні навички оцінювання та проєктування рішень.
• Відмінні навички комунікації та презентації у взаємодії з Клієнтами.
• Здатність самостійно вести технічні ініціативи та брати на себе відповідальність.
• Рівень англійської — Upper-Intermediate.

Come Back Agency helps US software and technology companies run 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.
 

About the Role 

We are looking for a Middle Python Backend Developer with 3+ years of commercial experience to join our backend engineering team. In this role, you will be responsible for developing robust backend services, integrating third-party APIs, managing AWS infrastructure, and participating in direct client communications. The ideal candidate can showcase 1–2 production projects, clearly articulate their personal contributions and solutions to technical challenges, confidently debug production incidents, and comfortably leverage modern AI tools like Claude Code in their daily workflow.
 

What You Will Do

• Backend Development: Develop, maintain, and scale high-performance backend services, build REST APIs, and integrate third-party services and AWS components.
• Optimization & Security: Ensure optimal application performance, code quality, system stability, and data security.
• Production Support: Debug and resolve production issues, analyze logs, and perform root-cause analysis during incidents.
• Client Interaction: Participate in client calls for requirements clarification, technical demos, task estimation, and explaining technical decisions.
   

Requirements

• Experience: 3+ years of commercial Python backend development experience.
• Production Track Record: 1–2 projects brought to production and supported post-release, with the ability to explain your specific role, obstacles faced, and technical solutions implemented.
• Core Python: Deep knowledge of Python 3 and async/await programming paradigms.
• Frameworks: Strong hands-on experience with FastAPI (or solid commercial background in Django/Flask with a strong readiness to transition to FastAPI).
• API Design: Clean REST API design, authentication, and authorization mechanisms.
• Databases: Solid experience with relational databases like PostgreSQL or MySQL (schema design, indexing, migrations, and basic query optimization), along with exposure to NoSQL databases.
• Cloud & DevOps Basics: Practical experience with AWS core services (S3, EC2, or Lambda), Docker, and Git.
• Testing: Writing unit and integration tests using pytest.
• Queues & Caching: Hands-on experience with Redis and queue systems (Celery, SQS).
• Incident Resolution: Hands-on experience debugging in production environments using logs, monitoring tools, and root cause analysis.
• AI Tools: Hands-on experience using Claude Code to accelerate development.
• Communication: Upper-Intermediate English level (B2+) or higher for seamless direct written and verbal communication with international clients.
   

Nice to Have

• Hands-on experience with DynamoDB.
• Experience with EventBridge and serverless architecture.
• Experience with LLM integrations (OpenAI API, LangChain / LangGraph).
• Commercial experience with Django.
• Experience setting up CI/CD pipelines.
   

What We Offer

• Working hours aligned with US time zones, typically 16:00–23:59 Kyiv time.
• Company-sponsored English lessons to support clear and confident communication.
• Paid vacation and sick days.
• Fully remote work.
• Opportunities for professional growth within the team.
• Structured, personalized onboarding to help you ramp up effectively.

Hiring stages: Recruiter screening → Technical Interview.
 

Apply with your resume and a short note outlining your relevant experience. You can also submit it through our website at comeback.ua. Selected candidates will be contacted by Come Back Agency.

Toronto time zone. Project duration - 3 months.

We're looking for a mature, Senior/Lead PHP Engineer with deep Laravel expertise and hands-on experience building or integrating agentic AI systems. You'll take ownership of complex backend features end-to-end, mentor other engineers, and help shape how AI-driven automation and agents fit into our product and internal workflows.

About the client:

Our client is a leading online car marketplace group operating across Europe and North America, bringing together market-leading brands to shape the future of our industry by combining the best of both regions.
 

What You'll Do:

• Design, build, and maintain robust backend services and APIs using PHP and Laravel
• Own features from technical design through deployment and monitoring
• Integrate and orchestrate agentic AI workflows (e.g., LLM-based agents, tool-calling pipelines, autonomous task runners) into existing products or internal tooling
• Improve system performance, reliability, and security across the stack
• Stay current with the PHP/Laravel ecosystem and emerging agentic AI tools and patterns

What You Need to Succeed:

• 6+ years of professional PHP development experience
• 4+ years building applications with Laravel (or comparable modern PHP framework experience with strong Laravel proficiency)
• Solid database skills (MySQL/PostgreSQL), including query optimization and schema design
• Familiarity with containerization (Docker) and cloud deployment (AWS, GCP, or similar)
• Strong communication skills and the judgment to work independently on ambiguous problems
• Hands-on GenAI experience — you've built with LLM APIs, tool/function calling, retrieval, agents, or agent frameworks and put them into real workflows.
• Modern AI coding tools (e.g., Claude Code, Codex) are part of how you work day to day.
• Strong communication and collaboration skills — you work well in a team, share your opinions clearly, and can move a topic forward with people across functions.
• Solid engineering fundamentals: testing, debugging, code quality, and getting things production-ready.
• English - at least Upper Intermediate+
• Work in EDT (Toronto) time zone

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

We are the creators of a new fintech era!
Our mission is to change this world by making blockchain accessible to everyone in everyday life. WhiteBIT is a global team of over 1,200 professionals united by one mission — to shape the new world order in the Web3 era. Each of our employees is fully engaged in this transformative journey.
We work on our blockchain platform, providing maximum transparency and security for more than 8 million users worldwide. Our breakthrough solutions, incredible speed of adaptation to market challenges, and technological superiority are the strengths that take us beyond ordinary companies. Our official partners include the National Football Team of Ukraine, FC Barcelona, Lifecell, FACEIT and VISA.
 
The future of Web3 starts with you — join us as a Blockchain Platform Engineer!
 
Requirements:

— Experience: 4+ years of professional experience in software engineering, where the last 2+ years was hands-on experience in the blockchain domain.

— Strong production Golang: you write and ship services in Go, and you are comfortable reading, debugging and patching upstream Go codebases.

— Blockchain Expertise: Extensive experience with Ethereum, including a deep understanding of its protocol, smart contract development, and associated technologies.

— Hands-on experience in developing, deploying, and maintaining smart contracts on EVM chains (Solidity).

— Understanding of L2s and optimistic rollup fundamentals: block derivation from L1, batch submission, state proposals, the withdrawal flow, and forced inclusion.

— Understanding of OP Stack components and architecture.

— Kubernetes and CI/CD: familiarity with Kubernetes for container orchestration and CI/CD tools for deployment automation.

— Monitoring Tools: Familiarity with monitoring tools such as Prometheus and Grafana for performance tracking.

— Cloud Platforms: Familiarity with cloud platforms (preferably AWS) and experience with containerization (Docker) is a strong plus.
 

Would be a plus:

— Rust at the level of reading and patching code.

— Understanding of fault proofs: dispute games, bisection, FPVM, as well as ZK-based approaches.

— Experience in conducting and successfully passing smart contract security audits.

— Experience in developing blockchain nodes, bridges, indexers, etc.
 

Responsibilities:

— Deploy, upgrade, and operate OP Stack components.

— Set up monitoring and alerting: Prometheus, Grafana, PromQL dashboards, instrumentation of domain metrics (economic, bridge, sequencing).

— Take part in the on-call rotation, drive incident response, and write post-mortems and runbooks.

— Work with the smart contracts, security and product teams on launches, network upgrades and hard fork activations.

— Foster collaboration, knowledge sharing, and professional growth.

— Work closely with cross-functional teams to define project requirements and ensure alignment with business objectives.

— Stay updated on advancements in blockchain technology and Ethereum, and apply new features and best practices to enhance our solutions.
 

Work conditions:

Immerse yourself in Crypto & Web3:
— Shape the Future — Work on high-impact blockchain products at the forefront of Web3.
— Innovate & Create — Your ideas drive real-world solutions and technological breakthroughs.
— Global Reach — Build scalable solutions for businesses and users worldwide.
— Web3-Powered Culture — A team of visionaries who believe in decentralization and innovation.
 
Work-Life Balance & Well-being:
— Modern equipment.
— Comfortable working conditions, and an inspiring environment to help you thrive.
— 24 calendar days of paid leave.
— Additional days off for national holidays.

Location: Remote, CET ±2
Workload: Full-time
Duration: Long-term
Start: Early 2027
English: Upper-Intermediate (B2+)
Domain: Business Intelligence (BI) / Developer Tools

About the Project

We are looking for an experienced Senior .NET Desktop Engineer to join a dedicated engineering team working on a long-term product in the Business Intelligence domain.

The product is a cross-platform desktop application designed for developers, with a focus on complex functionality, maintainability, and high-quality engineering.

We are looking for product-minded engineers who enjoy solving challenging technical problems, working with large existing codebases, and contributing to a product's long-term development.

Responsibilities

• Develop and maintain a cross-platform desktop application using C# and .NET 8+.
• Build and improve desktop functionality for Windows, macOS, and Linux.
• Implement UI components and application logic using XAML and MVVM.
• Work with an existing complex codebase, ensuring maintainability and scalability.
• Participate in architecture discussions, code reviews, and technical decision-making.
• Write clean, testable, and maintainable code.
• Collaborate with a dedicated product engineering team.
• Contribute to the long-term technical evolution of the product.

Requirements

• 5+ years of hands-on commercial experience with C# and .NET.
• Strong knowledge of .NET 8+.
• Commercial experience developing desktop applications — mandatory.
• Experience with cross-platform desktop development for Windows, macOS, and Linux.
• Strong understanding of XAML and MVVM.
• Practical experience with Avalonia, WPF, or .NET MAUI.
• Solid software engineering fundamentals: clean code, automated testing, and code reviews.
• Experience working with large, existing codebases.
• Previous experience in product development teams.
• Strong problem-solving skills and ability to work independently.
• English B2+.
• Availability to work within CET ±2 time zones.

Nice to Have

• Production experience with Avalonia UI.
• Experience with compilers, parsers, or language tooling.
• Knowledge of ANTLR, Roslyn, DSL, or IDE plugins.
• Experience with Power BI, DAX, Analysis Services, or semantic models.
• Experience developing tools for software engineers.

What We Offer

• Long-term, full-time engagement.
• Dedicated product development team.
• Technically challenging desktop product in the BI domain.
• Opportunity to work with modern .NET technologies.
• Remote collaboration within CET ±2 time zones.
• Expected project start in early 2027.

Important

This is a desktop engineering position, not a traditional .NET backend or web development role.

Candidates whose experience is primarily limited to ASP.NET Core, REST APIs, or backend services without hands-on desktop development experience will not be considered.

For an AI platform project in the construction and infrastructure consulting space (1M+ documents per client)

Location: Ukraine, Europe
English: Upper-intermediate
Start: ASAP

Brief requirements:
• 5+ years of Python backend development (FastAPI or similar) in production
• 1+ year of building LLM applications in production: tool calling, structured outputs, streaming
• Agent and orchestration frameworks (LangGraph, LlamaIndex, MCP), RAG integration: hybrid search, reranking, citations
• PostgreSQL (including performance tuning), async processing, queues, caching
• AWS (Azure/GCP also fine), CI/CD, containers, Terraform/CDK, observability