Jobs Backend

We are looking for an experienced AWS Engineer / .NET Developer with strong expertise in Amazon Web Services, .NET/C# web development, and AI technologies.

Must Have

• Strong hands-on experience with AWS (Amazon Web Services)
• Solid commercial experience with C# and .NET / .NET Core
• Strong experience with ASP.NET Core
• Experience with ASP.NET MVC
• Experience developing Web APIs / REST APIs
• Experience with web applications and web services
• Good knowledge of HTML, CSS, JavaScript / TypeScript
• Experience with modern web frameworks such as React and/or Angular
• Practical experience with AI technologies and AI-powered solutions
• Experience integrating AI capabilities into software applications
• Good understanding of cloud architecture and AWS services
• Experience with Git and CI/CD

• Good problem-solving skills and ability to work independently

   

Responsibilities

• Design, develop and maintain web applications using C#/.NET and ASP.NET Core
• Develop and maintain ASP.NET MVC applications
• Build and maintain Web APIs and REST APIs
• Develop backend services and cloud-based applications
• Work with AWS to deploy, maintain and scale applications
• Develop and integrate AI-powered functionality
• Integrate AI services and APIs into existing software products
• Work with frontend technologies such as JavaScript/TypeScript, React and/or Angular
• Improve application performance, scalability and reliability
• Participate in code reviews, technical discussions and architecture decisions
• Work closely with other developers, architects and technical teams

The candidate should have hands-on commercial experience with these technologies and be able to independently work on complex software and cloud-based solutions.

About the role

We are looking for a Senior Backend Engineer to join Proxet and contribute to a long-term engagement with a UK-based technology company developing simulation and decision-support solutions for governments and enterprises.

 

Who are we looking for?

Skills & Experience

• 7+ years of professional software engineering experience, with strong hands-on expertise in Python backend development.
• Experience building and maintaining production services, APIs, and integrations.
• Good understanding of distributed systems, microservice architectures, and asynchronous data processing.
• Experience with relational databases, preferably PostgreSQL, including schema design, query optimisation, and troubleshooting.
• Experience with data ingestion, processing pipelines, and integration of external data sources.
• Practical experience deploying and troubleshooting applications using Docker and Kubernetes.
• Experience with CI/CD pipelines, Git workflows, and automated testing.
• Strong debugging skills and the ability to investigate issues across services, data flows, and deployment environments.
• Experience using AI coding assistants in development, with the ability to review, validate, and take responsibility for generated code.
• Experience communicating directly with customers or external stakeholders to clarify requirements and resolve technical questions.
• Ability to explain technical concepts clearly to non-technical audiences and translate operational needs into engineering tasks.
• Strong ownership, sound technical judgement, and comfort working with evolving requirements.
• Understanding of the Ukrainian context and confidence in communicating with local organisations.
• Professional proficiency in Ukrainian and English for customer meetings, technical discussions, and written communication.
• Willingness and ability to travel to customer sites within Ukraine.

Nice to have

• Hands-on experience with Kafka publishers and consumers.
• Experience with Dagster or similar data orchestration tools.
• Experience working with public-sector organisations, local authorities, or infrastructure operators.
• Experience adapting and deploying software in customer-managed or private-cloud environments.
• Familiarity with GCP, AWS, or Azure.
• Experience with Helm, OpenShift, and shell scripting.
• Familiarity with Parquet, object storage, and metadata management.
• Experience integrating AI agents, MCP interfaces, or LLM APIs.
• Familiarity with simulation platforms, digital twins, or decision-support systems.
• Knowledge of C++.

Responsibilities

• Design, develop, and maintain Python backend services and APIs supporting customer applications and simulation workflows.
• Work directly with customers and external organisations in Ukraine to understand their needs, operational processes, and local constraints.
• Participate in customer meetings, clarify requirements, and explain technical options and trade-offs.
• Translate customer needs into implementation tasks, data requirements, and integration specifications.
• Adapt existing platform capabilities to local use cases and share customer insights with the wider engineering and product teams.
• Build and maintain data ingestion and processing pipelines using Dagster.
• Integrate customer data sources with platform services and containerised simulation models.
• Work with Kafka publishers and consumers to process simulation outputs.
• Design and optimise PostgreSQL schemas and queries, and support appropriate data storage solutions.
• Build reusable backend components and identify opportunities to apply customer-specific improvements across other deployments.
• Contribute to deployment and troubleshooting of containerised applications in Kubernetes-based environments.
• Maintain automated tests and CI/CD workflows to support reliable delivery.
• Collaborate with frontend engineers, platform specialists, modellers, and delivery stakeholders.
• Participate in code reviews and technical design discussions, documenting decisions and integration approaches.
• Use AI development tools effectively while maintaining code quality, correctness, and maintainability.
• Communicate progress, dependencies, and technical issues clearly to both internal teams and customer stakeholders.

We’re looking for an AI-forward Backend Developer to help build a platform focused on international payments, crypto infrastructure, and blockchain integrations.

The platform integrates external payment and financial service providers such as Bridge, works with crypto and stablecoin-related services, and supports on-chain interactions. The backend is primarily API-driven, connecting external systems, processing transactions and events, and storing application data in MongoDB.

We value engineers who are passionate about developer platforms, enjoy solving integration challenges, and use Claude and other AI-powered tools to accelerate development.

Responsibilities

• Develop and maintain backend services using Node.js, TypeScript, and Express.js.
• Design and implement REST APIs and integrations with third-party services.
• Integrate payment infrastructure providers such as Bridge and similar fintech or crypto platforms.
• Build backend workflows for international payments, stablecoins, and crypto-related operations.
• Work with blockchain APIs, on-chain transactions, and transaction status monitoring.
• Design and maintain MongoDB schemas, data models, and persistence logic.
• Implement webhooks, background jobs, asynchronous workflows, and reliable error handling.
• Ensure data consistency and reliability when processing payment and blockchain events.
• Deploy, maintain, and monitor backend applications and services on AWS.
• Apply security best practices when handling sensitive financial data and transaction workflows.
• Use Claude and other AI-powered development tools in daily engineering tasks.
• Collaborate with the team on architecture, implementation, and technical improvements.

Requirements

• Strong experience with Node.js and TypeScript.
• Practical experience building backend services with Express.js.
• Experience with MongoDB and database design.
• Proven experience integrating third-party APIs into production applications.
• Good understanding of REST APIs, webhooks, authentication, and asynchronous processing.
• Experience deploying and maintaining applications on AWS.
• Understanding of crypto, blockchain fundamentals, and on-chain transactions.
• Familiarity with financial transaction workflows, error handling, and data consistency.
• Hands-on experience with Claude or similar AI coding tools.
• Ability to work independently, troubleshoot complex integrations, and take ownership of backend features.

Nice to Have

• Experience with fintech, international payments, or cross-border payment systems.
• Previous experience integrating Bridge or similar payment and crypto infrastructure providers.
• Knowledge of stablecoins, crypto wallets, blockchain APIs, and transaction signing.
• Familiarity with Ethereum and EVM-compatible networks.
• Experience with smart contracts, blockchain event indexing, or transaction monitoring.
• Familiarity with AWS services, queues, background workers, and distributed systems.
• Experience building developer platforms, public APIs, or SDKs.
• Basic familiarity with React or Next.js to support full-stack collaboration when needed.

Who We’re Looking For

We’re looking for a practical, AI-first backend engineer who uses Claude to accelerate implementation, explore solutions, debug issues, and improve code quality without blindly relying on generated code.

You enjoy building backend systems that connect external APIs, process financial data, and interact with blockchain infrastructure. You understand the importance of security, reliability, and proper error handling when working with payment systems and on-chain transactions.

You’re comfortable working in a lean team, making technical decisions, and delivering straightforward solutions without unnecessary complexity. A passion for developer platforms and making API integrations easier for other developers is a strong advantage.

What We Offer

• The opportunity to build a product at the intersection of international payments, crypto, and blockchain.
• An AI-first development environment with tools such as Claude.
• A lean team, direct communication, and technical ownership.
• The opportunity to work on real-world payment integrations and crypto infrastructure.

If you enjoy backend engineering, API integrations, blockchain technology, and AI-assisted development, we’d love to hear from you.

We are looking for a Mid/Senior Java Backend Engineer to join the insurance division of a large Polish software company. This is a backend-first role: you will build high-performance services and integrations with external providers for in-house platforms used by insurers in Poland and abroad. The platforms cover the full policy lifecycle and claims handling and process millions of operations every month. You will work in an international team with colleagues from Scandinavia, Belgium and Poland, on modules such as financial settlement, accounting, investment funds and claims. The team works in a Spec Driven Development model with AI agents, using them for specs, planning, documentation and tests. Over time, you may also pick up Angular tasks as the project needs, so openness to frontend work is important.

Details:

• Schedule: Full time
• Location: Hybrid – Kraków, Gdańsk, Łódź or Poznań, Poland (3 days in the office, 2 remote; more office time during onboarding, up to 3 months)
• Start: ASAP
• Duration: Long-term
• English: Upper-Intermediate (B2)
• Polish: Elementary (B2) or higher
• Type of collaboration: Internal Employment (UoP) or B2B Contract – your choice

About the project:
The company is one of the largest software vendors in Poland. Its insurance division builds its own platforms for insurance companies in Poland and other European markets. These systems support the whole policy lifecycle, from product setup and sales to policy servicing and claims processing. They handle millions of operations a month, so performance, reliability and data accuracy really matter. The division is growing fast and is adding engineering teams in several Polish cities. Teams are international and work closely with business analysts and insurance domain experts. Engineering is moving toward structured, AI-assisted development, where AI agents support specs, planning, documentation and testing.

You have:

• 4+ years of commercial software development experience
• Strong commercial experience with Java and Spring Boot in production systems (experience limited to CMS/AEM or legacy J2EE is not a fit)
• Experience building high-performance REST APIs
• Experience building integrations with external providers and third-party systems
• Experience with MongoDB and/or PostgreSQL
• Openness to learning Angular and taking on frontend tasks over time
• Structured use of AI tools in development (specs, planning, tests), not only autocomplete
• Polish at A2 level or higher (everyday conversation), as some teams work in Polish
• English at B2 level (team communication and technical documentation)
• Legal right to work in Poland (e.g. Karta Pobytu, permanent residence or EU citizenship)
• Readiness to work from the office in Kraków, Gdańsk, Łódź or Poznań 3 days a week

Nice to have:

• Experience in the insurance, banking or fintech domain
• Experience with microservices, event-driven architecture (Kafka), sagas or DDD
• Any hands-on experience with Angular or TypeScript

What to do:

• Design, build and maintain backend services in Java and Spring Boot for insurance platforms
• Build high-performance REST APIs and integrations with external providers
• Work with MongoDB and PostgreSQL databases
• Work on business modules such as financial settlement, accounting, investment funds and claims
• Use AI agents in a Spec Driven Development process to write specs, plan work, document solutions and create tests
• Collaborate with an international team (Scandinavia, Belgium, Poland), business analysts and domain experts
• Take part in code reviews and architecture discussions
• Pick up Angular frontend tasks when the project needs them

Our promotional features team is seeking a Senior Backend Engineer. This role is focused on developing and optimising promotional features for our gaming platforms, where performance, scalability, and cutting-edge solutions are paramount.

If you’re a product-passionate person, your mind is keen to solve deep tech engineering problems, and you have a fast “PoC first” approach with a deep sense of ownership, we would love to hear from you.

Main Responsibilities

– Develop and maintain robust backend systems for our promotional features

– Optimize existing systems for enhanced performance and scalability

– Lead technical decisions and contribute to our SaaS solutions

– Collaborate with distributed teams to innovate and implement new features

– Ensure code and architectural excellence through reviews

– Address complex technical challenges with innovative solutions

– Participating in on-call rotations within the squad to help ensure the reliability and availability of our systems

Mandatory Requirements

– Strong proficiency in Node.js and TypeScript (our primary backend stack). We’re also open to strong backend engineers from other ecosystems (e.g., Go, Java, Python, C#, C++) who are ready to ramp up quickly

– Strong understanding of asynchronous programming and concurrency patterns

– Experience building distributed systems and working with messaging and coordination tools (e.g., Kafka, RabbitMQ, NATS, distributed locks)

– Experience with gRPC in production environments

– Solid knowledge of databases: relational (MySQL, PostgreSQL), columnar (ClickHouse), and NoSQL (DynamoDB, MongoDB)

– Experience with cloud platforms (AWS/GCP/Azure) and Kubernetes

– Skilled in building and maintaining unit and end-to-end tests

– Proven track record of delivering production-ready solutions

– Experience working with large-scale microservices architectures

– Degree in Computer Science or a related field (or equivalent practical experience)

Nice to Have

– Understanding of enterprise development patterns

– Experienced with large-scale microservices architecture

– Experience with cloud providers (AWS, GCP, etc.)

– Active performance observation

– Gambling domain experience

– Understanding of application security and industry standards, its best practice

We offer

– Competitive Salary

– Quarterly Bonuses

– Unlimited Paid Time Off

– Unlimited Paid Sick Leave

– Remote & Flexible Working

– Private Medical Insurance

– Financial Support for Life Events

– Professional Development Budget

– International Exposure

– Regular Company Events

*Benefits may vary depending on location and contractual agreement

Our partner is a leading B2B iGaming supplier delivering engaging casino content to regulated markets worldwide. Since 2012, they’ve been building high-quality gaming experiences through a modern cloud-native platform that powers hundreds of operator brands across multiple jurisdictions.

Their Platform Solutions team sits at the heart of that ecosystem, enabling seamless integrations between the company, operators, aggregators and platform providers.

Our partner is looking for a Senior Backend Developer who thrives in a deeply hands-on environment and enjoys being close to the code on a daily basis. This role is heavily focused on building, optimising, and scaling backend services in a high-load system where performance and reliability are critical.

You’ll be working on complex, real-time challenges at the core of their platform – improving latency, ensuring high availability, and making systems more efficient at scale. This is not a coordination-heavy role; it’s for someone who enjoys writing production code, solving tough engineering problems, and seeing the direct impact of their work.

Main Responsibilities

• Work as part of a cross-functional team owning a core product within the platform
• Design, build, and deliver new backend features end-to-end in a distributed environment
• Write high-quality, production-level code daily, contributing directly to a high-load, scalable system
• Take ownership of services handling financial transactions at scale, with a strong focus on reliability
and accuracy
• Proactively suggest and implement improvements in architecture, processes, and development
practices
• Participate in code and architectural reviews to maintain high engineering standards
• Solve complex business and technical challenges with pragmatic, efficient solutions
• Participating in on-call rotations within the squad to ensure the reliability and availability of our
systems
• Play an active role in ongoing tech transformation initiatives across the platform
• Collaborate closely with engineers, product, and other stakeholders to deliver impactful solutions
used by millions globally

Mandatory Requirements

• Solid experience with Node.js/TypeScript is ideal, but we also welcome experts in other OOP languages such as Java, Python, C++, C#, or Go.
• Strong understanding of asynchronous programming techniques
• Experience with distributed systems and messaging systems (Apache Kafka, gRPC)
• Knowledge of relational databases (MySQL, PostgreSQL), columnar databases (ClickHouse), and
NoSQL technologies (DynamoDB, MongoDB)
• Skilled in developing and maintaining end-to-end and unit tests
• Proven track record of developing production-ready solutions
• Degree in Computer Science or related field

Nice to Have

• Experience with large-scale microservices architecture.
• Good ground knowledge of Kubernetes
• Familiarity with cloud providers (especially AWS)
• Understanding of application security and industry best practices
• Understanding of enterprise development patterns
• Active performance observation
• Gambling domain experience

We offer

• Competitive Salary
• Quarterly Bonuses
• Unlimited Paid Time Off
• Unlimited Paid Sick Leave
• Remote & Flexible Working
• Private Medical Insurance
• Financial Support for Life Events
• Professional Development Budget
• International Exposure
• Regular Company Events

UNITY-BARS - українська ІТ компанія, яка спеціалізується на розробці та впровадженні банківського програмного забезпечення та фінансових установ, у пошуках  Middle - Senior .NET Developer 

Необхідно:

• .NET, .NET Core; 
• Web API; 
• RxJS; 
• Entity Framework; 
• Angular; 
• NgRx; 
• Reactive Forms; 
• REST API; 
• EF Core; 
• DI (dependency injection); 
• SOLID principles; 
• HTML & CSS;
• JWT; 
• Досвід роботи від 2х років. 

Буде перевагою: 

• Технічна освіта (Інформаційні технології, комп’ютерні науки та ін.); 
• Досвід роботи з Kafka (на рівні принципів producer/consumer) та SignalR. 

Що будемо робити:

• Розробка інтеграційного модуля; 
• Адаптація існуючих рішень. 

Ми пропонуємо: 

• Офіційне працевлаштування;
• Змішаний графік роботи;
• Медичне страхування;
• Корпоративні курси англійської;
• Проєкти для країни та комерційного ринку, а також можливість постійного навчання та розвитку. 

Етапи підбору: співбесіди (онлайн) soft skills /hard skills / final

Solead Software is looking for an experienced .NET AI engineer to join our growing team to extend our custom software platform for information management industry with modern AI capabilities.

The primary goal is to make information management services more efficient and reduce manual work by means of introducing AI automation. The existing software platform is built on MS .NET and SQL Server technologies, using Azure services and integrations with multiple third-party systems. Multiple AI assistants and agents should be added into existing architecture via MS Agent Framework and Azure AI Foundry. The first practical tasks will be in building an AI powered PDF invoice parser and creating an AI agent for customer support via email.

Currently, Solead team consists of seven professionals split into three small subteams, and tightly collaborating with team mates in Europe and USA. Agile workflow assumes intense collaboration within the team, regular communication with project stakeholders, daily code commits and weekly releases. The entire software engineering process is based on GitLab environment with AI assistants and very high attention to code quality and documentation.

Join our amazing team and work on a large-scale project utilizing best practices and approaches in software development industry. You’ll meet great people and software professionals who will share with you valuable knowledge and expertise. You’ll be creating real software for real users, and seeing how your products help them in daily work.

This is a full-time position in Lviv, Ukraine. We combine work in our modern and spacious office with work at home.

Technology Stack

• Frontend: React, TypeScript, TanStack Query, Tailwind CSS, ASP.NET MVC, Bootstrap, jQuery, WPF, XAML
• Backend: .NET 10, C# 14, ASP.NET Core Web API, REST, Entity Framework Core, RabbitMQ, JWT Bearer Authentication, SQL Server, Microservices, Docker, Azure Cloud
• Tools: Consul, Swagger, GitLab, CI/CD, Visual Studio, Teams, MS Copilot / GitLab Duo

• AI: MS Agent Framework, Azure AI Foundry, LLM, RAG, MCP

   

Duties and Responsibilities

• Design, implementation and maintenance of various AI automation capabilities for the existing .NET based custom software platform
• Following well-established development process and practices, such as code review and documenting, code testing and merging, etc.
• Participation in Agile/Scrum workflow, iteration planning, team meetings, technical brainstorming, peer reviews, etc.
• Regular communication to other team members and project stakeholders, work progress and status reporting

• Proactive suggestions on how to improve the product, optimize workflow and enhance usability

   

Skills and Qualifications

• B.Sc. or M.Sc. degree in computer science, applied math, or similar
• 7+ years of experience in building commercial software systems
• Strong expertise in modern AI models, techniques, frameworks and engineering practices to build AI solutions and automate business workflows
• Good understanding of different LLMs, RAG and MCP technologies
• Experience in creating AI agents and assistants using MS Agent Framework and Azure AI Foundry
• .NET (Framework/Core) and C# programming skills
• Solid expertise in modern cloud technologies and software integration methods
• Git/GitLab and CI/CD working experience
• Agile/Scrum approach knowledge and practice
• High attention to details, accuracy, analytical and troubleshooting skills
• Smartness, agility and ability for quick ramp-up
• Upper-intermediate or better English communication skills (B2+)

We’re expanding our team and looking for a Django/DRF Developer to join Dataforest. If you’re looking for a friendly team, a healthy working environment, and a flexible schedule — you’ve found the right place to send your CV.

You'll be a great fit if you have:

- 3+ years of experience with Django and it's components;

- Experience with RESTful APIs, DRF and related libraries;

- Experience with Celery and async task management;

- Experience with SQL and query optimisation;

- Experience of writing tests;

- Able to work independently and excellent in communicating challenges and issues;
 

Would be a plus:

- Experience with AWS services (EC2, API Gateways, Lambda, SQS);

- Experience with NoSQL databases (Redis, Elasticsearch, etc.);

- Experience of end-to-end implementation for new functionality;

- Experience with payment systems integrations (Stripe, Shopify, Recurly, Paypal, Braintree, etc.);

- Experience with chargeback management tools (Ethoca, RDR, CDRN, etc.);

- Understanding how to handle high load on projects;
 

What you'll do:

- Design, develop and maintain payment gateway and other integrations;

- Design and develop new features and maintain existing functionality.

- Design and develop web applications using Python/Django/Celery.

- Design, develop and maintain RESTful APIs using Django Rest Framework (DRF).

- Write clean and well-structured code that is easy to read and maintain;

- Write and maintain technical documentation.

- Write and maintain unit tests to ensure code quality.

- Optimize and maintain the security, performance, and usability of the applications.

- Collaborate with the PM/Frontend/DevOps/QA and others team members.

We ensure your growth with:

- Great networking opportunities with international clients, challenging tasks;

- Building interesting projects from scratch using new technologies;

- Personal and professional development opportunities;

- Competitive salary fixed in USD;

- Paid vacation and sick leaves;

- Flexible work schedule;

- Friendly working environment with minimal hierarchy;

- Comfortable, spacious and well-equipped office in the city center;

- Team building activities, corporate events.

Hi! We are looking for a Middle Backend Engineer to develop the backend for a new AI-powered video recording and editing platform with Mobile, Web, and Desktop clients.
 

Key Responsibilities

• Design, develop, and maintain backend services for cross-platform applications.
• Build REST APIs for content management, including secure S3 uploads, media metadata, thumbnails, and scheduling.
• Orchestrate video processing jobs using existing AI workers on RunPod, including job scheduling, status tracking, and error handling.
• Integrate third-party services for payments, analytics, AI, and API security (e.g., RevenueCat, Firebase App Check, OpenAI).
• Implement real-time communication and state synchronization between clients using WebSockets.
• Develop and maintain background jobs, queues, and scheduled tasks.
• Collaborate with product managers and client application developers.
• Participate in architectural decisions and technical improvements.

Requirements

• Solid experience with backend frameworks, databases, and database design.
• Understanding of authentication, authorization, and API security.
• Experience integrating third-party APIs and handling webhooks.
• Experience with Docker, Git, and CI/CD pipelines.
• Ability to deliver maintainable, production-ready code.

How to Apply

Please respond with 1–2 relevant projects.

🚀 Senior Back End Engineer (Node.js): Shape the Backend of a Global B2B Platform

The challenge:

Picture an enterprise platform used by customers worldwide, processing huge volumes of data through distributed systems where performance, scalability, and reliability aren’t nice-to-haves but the baseline.

Our client is an established international technology company building a sophisticated B2B software platform. The environment is data-intensive and complex: mature production systems live side by side with ongoing innovation. The team is constantly developing new capabilities, optimizing existing services, and improving the underlying architecture.

Your role:

We’re looking for an experienced Senior Back End Engineer to join a product engineering team working on large-scale software systems. The role is predominantly backend, with occasional frontend work when a project needs it.

You’ll take end-to-end ownership of your solutions: from requirements analysis and system design to implementation and deployment. You’ll collaborate with cross-functional teams, influence architectural decisions, and work with a high degree of autonomy. We’re looking for someone independent and proactive, with strong technical judgment and a product-oriented mindset.

What you’ll do:

• Build and maintain scalable production services in TypeScript and Node.js
• Own system-design decisions for new capabilities and integrate them with existing infrastructure
• Turn product and engineering requirements into effective technical solutions
• Design and optimize PostgreSQL queries, indexes, and database performance
• Contribute to React frontend work when the project calls for it
• Work with DevOps on deployments, observability, capacity, and production readiness
• Handle feature development, bug fixes, security improvements, and production patches
• Evaluate architectural alternatives and communicate trade-offs in business terms
• Use AI development tools daily for planning, coding, and testing

• Join the on-call rotation and help resolve critical production issues

   

What you bring

• 5+ years of backend development on production systems at scale, with a solid understanding of distributed systems
• Strong hands-on TypeScript and Node.js expertise
• Solid system-design skills and the ability to explain decisions and trade-offs
• Strong PostgreSQL skills: complex queries, optimization, indexing, performance tuning
• Familiarity with React and willingness to work on the frontend when needed
• Familiarity with CI/CD, Docker or Kubernetes, and observability
• Ability to work independently and collaborate across teams
• Product-oriented thinking that connects technical choices to business and user needs

• Practical experience with AI-assisted development tools

   

Bonus points:

✦ Microsoft Azure or another major cloud platform
✦ Redis, Elasticsearch, or ClickHouse
✦ Deeper DevOps experience: infrastructure and deployment workflows

Why us:

• 20 days of vacation per year, plus official national holidays in your country of residence
• Full accounting and legal support in all countries where we operate
• A powerful workstation and access to coworking space when needed

If you want real ownership, interesting scale, and a say in how the system evolves, let’s talk.

This is not a traditional fullstack development assignment. Client requires specialists capable of combining established software engineering practices with the design, integration and optimisation of AI-powered functionalities within business-critical banking applications.

The candidates will initially support the maintenance, stability and continuous improvement of existing applications. Over time, they will progressively assume full responsibility for implementing new functionality and translating business requirements into production-ready solutions.

Key responsibilities:
1. Maintain, troubleshoot and continuously improve existing applications and services to ensure stability, performance and reliability.
2. Independently analyse business requirements, design solutions and implement new application features and enhancements.
3. Contribute to the design, development and continuous improvement of AI-powered application functionalities.
4. Support the architecture and implementation of intelligent chatbot solutions powered by Large Language Models.
5. Develop and integrate application interfaces to enable reliable communication between internal systems, external platforms and AI services.
6. Participate in architectural decisions concerning application scalability, infrastructure, maintainability and security.
7. Support deployment, operation and optimisation of applications within cloud-native and containerised environments.
8. Collaborate closely with developers, architects, business stakeholders and other cross-functional team members.
9. Work within an Agile/Scrum environment, participating in planning, refinement, implementation and delivery activities.
10. Apply secure development practices, including protection against misuse, inappropriate content and unauthorised access.
11. Ensure that implemented solutio

Must-haves:
1. Python development: Strong professional experience developing, maintaining and optimising backend services using Python. Candidates must be capable of independently implementing complex business logic and delivering reliable, maintainable applications.

2. Angular 21+: Hands-on experience developing modern frontend applications using Angular version 21 or newer, including implementing new features, maintaining existing components and integrating frontend applications with backend services.

3. Fullstack software engineering: Proven ability to work across frontend and backend components, understand end-to-end application architecture and deliver complete functional solutions.

4. AI and LLM integration: Practical experience designing, developing and integrating AI-powered application components, particularly solutions based on Large Language Models.

5. LangChain and LangGraph: Hands-on experience with both frameworks to develop, orchestrate and manage LLM-driven workflows, application logic and AI-based interactions.

6. MCP and A2A: Practical experience with Model Context Protocol (MCP) and Agent-to-Agent (A2A) technologies for connecting AI systems, external tools and agent-based functionalities.

7. LLM chatbot development: Experience designing and implementing LLM-powered chatbot solutions, including conversation handling, integration with existing systems and production deployment.

8. Prompt Engineering: Ability to design, structure, test and optimise prompts to improve the quality, consistency, reliability and relevance of AI-generated responses.

9. OpenAI integration: Experience integrating OpenAI or comparable AI platforms into software applications through APIs and related integration mechanisms.

10. AI solution architecture: Understanding of architectural patterns for building secure, reliable, scalable and maintainable AI-powered software solutions.

11. Containerisation and orchestration: Practical experience with OpenShift, Kubernetes and Docker for deploying, managing and maintaining containerised applications.

12. GitLab and Helm: Experience using GitLab within software development workflows and Helm for managing application deployments in Kubernetes environments.

13. PostgreSQL: Experience working with PostgreSQL databases, including application integration, data persistence and database-related development activities.

14. REST API development: Strong experience designing, developing, integrating and maintaining REST APIs and other application interfaces.

15. Network infrastructure and security: Good understanding of networking principles, infrastructure components, secure communication and relevant application security concepts.

16. AI application security: Experience implementing security and protection mechanisms, specifically:
- Rate limiting to control request volumes and prevent misuse.
- Spam protection to reduce malicious or unwanted interactions.
- Guardrails to control AI behaviour and enforce application policies.
- Content filtering to prevent inappropriate or prohibited outputs.
- Content moderation to identify and manage potentially harmful user inputs and AI-generated content.
17. Agile/Scrum: Practical experience working within Agile software development teams, including sprint planning, collaboration, iterative delivery and continuous improvement.

18. Jira and Confluence: Experience using Jira for task and project tracking and Confluence for technical documentation and knowledge sharing.

19. Independent delivery: Ability to transition from supporting maintenance activities to independently owning the implementation of new features and business requirements.

We offer:

• Attractive financial package

• Challenging projects

• Professional & career growth

• Great atmosphere in a friendly small team

• Flexible working hours

We’re looking for a Python Full-Stack Developer with 1–2 years of experience to help build and maintain web applications and backend services.

You’ll work closely with experienced engineers to develop new features, integrate APIs, and contribute to reliable, user-friendly applications while continuing to grow your technical skills.

What you’ll do

- Develop and maintain backend services and REST APIs using Python
- Work with frameworks such as FastAPI, Django, or Flask
- Build and maintain frontend components using JavaScript or TypeScript and React
- Work with relational databases such as PostgreSQL or MySQL
- Write clean, maintainable, and testable code
- Integrate third-party APIs and external services
- Write unit tests and participate in code reviews
- Troubleshoot bugs and improve application performance
- Use Git for version control and collaborate with the development team
- Participate in technical discussions and contribute to improving existing solutions
- Document technical implementations when needed
 

What we’re looking for

- 1–2 years of commercial experience in Python development
- Good knowledge of Python fundamentals and object-oriented programming
- Familiarity with at least one Python web framework, preferably FastAPI or Django
- Understanding of REST APIs and HTTP fundamentals
- Experience working with SQL databases, preferably PostgreSQL
- Basic knowledge of JavaScript or TypeScript, HTML, and CSS
- Familiarity with React or another modern frontend framework
- Understanding of Git, unit testing, and software development best practices
- Basic knowledge of Docker and application deployment concepts
- Good problem-solving skills and willingness to learn
- Intermediate English or higher
 

Nice to have

- Experience with asynchronous programming in Python
- Familiarity with Redis or other caching solutions
- Experience with cloud platforms such as AWS, Azure, or GCP
- Familiarity with CI/CD pipelines
- Experience integrating AI APIs or working with LLM-based applications

🎁 What we offer
- 100% remote work
- Flexible working hours
- Competitive compensation
- Paid vacation and sick leave
- Health insurance / medical support
- Professional development and learning opportunities
- A friendly, supportive team with direct communication
- The opportunity to work on challenging international projects

.NET Full-Stack Engineer -  Microsoft Teams Bots & Communications
 

We’re looking for an experienced .NET Full-Stack Engineer to join a long-term product team working within the Microsoft Teams ecosystem.
 

The role is primarily backend-focused and combines Microsoft Teams bots, Microsoft Graph integrations, real-time activity processing, notifications, and communication-related functionality.
 

You’ll work on production features inside Microsoft Teams, including bot interactions, activity feeds, communication events, and integration with Microsoft 365 services.
 

What you’ll work on

• Design, develop, and maintain Microsoft Teams bots that process user and system activity in real time.
• Build and improve a real-time activity feed bot that sends timely notifications to users’ Teams activity feed through Microsoft Graph.
• Develop integrations with Microsoft Graph API, Microsoft Teams APIs, and Microsoft 365 services.
• Work with Teams-related functionality such as calls, meetings, participants, recordings, call records, notifications, and communication data.
• Build backend services for collecting, processing, and exposing Teams activity and communication data.
• Implement real-time functionality using SignalR / WebSockets where applicable.
• Set up and manage bot authentication and permissions with Microsoft Entra ID (Azure AD).
• Contribute to frontend functionality using React / Angular / TypeScript when needed.
• Troubleshoot application-level integration issues and improve reliability and performance.
   

Core stack

• C# / .NET / ASP.NET Core
• Microsoft Graph API
• Microsoft Teams APIs
• Microsoft Graph Communications / Cloud Communications APIs
• Microsoft Bot Framework / Teams bots
• Microsoft Entra ID
• SignalR / WebSockets
• SQL
• REST APIs
• React / Angular / TypeScript
   

Requirements

• 5+ years of commercial experience with C# / .NET
• Strong backend experience with ASP.NET Core
• Commercial experience with Microsoft Graph API
• Hands-on experience with Microsoft Teams integrations
• Experience developing or supporting Teams bots
• Understanding of Teams activity feed notifications, Graph permissions, authentication, and event-driven integrations
• Experience with Microsoft Entra ID / Azure AD authentication and permissions
• Experience with SQL and REST APIs
• Ability to independently deliver integrations and troubleshoot production issues
• English B2+
   

Strong advantage

• Microsoft Graph Communications / Cloud Communications APIs
• Teams calls / online meetings / call records / recordings / participants
• Real-time audio/media
• VoIP / telephony
• WebRTC
• SIP / RTP
• Direct Routing
• Azure Communication Services
• High-load or distributed systems
   

About the project

This is a long-term product, not a short-term integration project. You’ll join a stable development team with an ongoing roadmap and deep involvement in the Microsoft Teams ecosystem.

The role combines backend engineering, cloud infrastructure, Microsoft Graph integrations, Teams bot development, and real-time communication functionality.
 

What we offer

• Long-term cooperation
• Full-time engagement
• Stable US-based client
• Predictable workload
• Paid vacation and sick leave
• Professional development support
• Equipment provided
• Office lunches
• Anniversary and baby bonuses

Senior ColdFusion Developer

We are looking for a Senior ColdFusion Developer to help keep an established e-commerce marketplace reliable and running smoothly. The platform serves buyers and sellers and connects with external business systems. Your focus will be production support, backend maintenance, and essential integrations as the platform evolves.

What you’ll bring

• 5+ years of production experience with ColdFusion and/or Lucee.
• Strong MySQL skills and confidence working with complex databases.
• Practical AWS experience, including infrastructure monitoring and troubleshooting.
• Experience building and maintaining REST APIs and third-party integrations.
• Ability to navigate an existing codebase, investigate issues, and deliver reliable fixes independently.
• Clear communication and a willingness to document technical decisions and system behavior.

Experience with e-commerce, payment workflows, ERP integrations, or marketplace platforms would be an advantage.

Your day-to-day work

You’ll investigate application and integration issues, fix bugs, and improve the stability of the existing platform. You’ll also support AWS operations, maintain connections with external services, and implement selected changes needed for business continuity.

The work combines hands-on development with production troubleshooting and collaboration on technical priorities. Keeping documentation up to date and sharing system knowledge are part of the role.