Jobs Developers

We’re expanding our engineering team and looking for developers who are comfortable building production-grade React and Node.js applications for early-stage companies in healthcare, fintech, and AI.

Although the role is primarily front-end oriented, the ability to contribute to backend services in Node.js is important.

You’ll join a team with clear processes, a modern stack, and a strong engineering culture.
 

What you will do

• Develop web applications using React and related tooling.
• Build and maintain backend services and APIs with Node.js (Nest.js or similar frameworks).
• Work with cloud environments and containerized setups using tools like Docker, Kubernetes, AWS, or GCP.
• Participate in architectural discussions, propose improvements, and help maintain technical standards.
• Implement new features from specification to production.

What we expect

• Solid knowledge of JavaScript (ES6+) and TypeScript.
• Strong practical experience with React
• Familiarity with Node.js (Nest.js or Express).
• Experience developing APIs using Node.js frameworks.
• Understanding of relational or NoSQL databases (Postgres, MongoDB, Firebase, Supabase).
• Ability to write maintainable, well-structured code and follow best practices.
• English at an Intermediate level or higher.

Additional advantages

• Experience with major cloud providers (AWS, Google Cloud).
• Experience with React Native
• Practical understanding of Docker/Kubernetes.
• Familiarity with CI/CD pipelines (GitHub Actions, GitLab CI, CircleCI).

What we offer

• Engaging projects built with a modern, well-supported tech stack.
• A review process that ensures consistent feedback and knowledge sharing.
• A culture focused on continuous learning and professional development.
• Full remote work with a team distributed across multiple countries.
• Competitive compensation in USD with periodic performance reviews.
• Flexible payment methods tailored to your location.
• Work schedule aligned with your time zone.
• English practice sessions.
• Paid sick leave and annual vacation (15 business days).
• Regular team activities online.
• Coverage of monthly psychologist support sessions.

Junior JavaScript / NestJS Developer

Junior JavaScript Developer with experience in backend development using NestJS and Node.js. Skilled in building and maintaining REST APIs, implementing server-side logic, working with databases, and supporting existing applications. Familiar with JavaScript, NestJS, Git, and basic software development principles, including clean code practices and debugging.

Worked with API integrations, database queries, authentication flows, and application performance improvements. Comfortable collaborating in team environments, following technical requirements, and learning new tools and frameworks quickly.

Looking for an opportunity to contribute to a product-focused team, grow as a backend developer, and deepen expertise in JavaScript ecosystem and scalable backend development.

📍 Location: EU only
🕒 Full-time | Long-term project (initially 6 months+)
🕘 Working hours: 9:00–18:00 CET
 

We’re looking for a strong Senior NLP & Python Developer to join an innovative AI-powered healthcare product focused on clinical trial automation and protocol intelligence.

The product is a next-generation Clinical Trial Management System (CTMS) that uses AI to analyze complex medical protocols (100–400+ page documents) and transform them into structured, executable workflows for research sites and clinical operations teams.

You’ll work on advanced NLP/RAG pipelines, scalable backend architecture, and AI systems that must meet strict healthcare compliance and auditability requirements.

What you’ll work on

• Designing and optimizing RAG pipelines for medical protocol parsing
• Building AI-powered extraction systems using LangChain, LangGraph, LLMs, and VLMs
• Improving AI traceability, reproducibility, and deterministic outputs
• Developing scalable backend services with FastAPI and PostgreSQL
• Working with vector databases (pgvector) and embedding pipelines
• Implementing document classification and extraction workflows
• Enhancing observability, validation, monitoring, and testing
• Supporting validation-ready and compliance-oriented architecture
• Improving performance and scalability of AI/ML infrastructure

Tech Stack

• Python 3.14
• FastAPI
• SQLModel / SQLAlchemy / Pydantic v2
• PostgreSQL + pgvector
• LangChain / LangGraph
• Docker / Docker Compose
• Celery
• Redis
• RabbitMQ
• NLP / LLM / VLM pipelines

Requirements

• 5+ years of commercial Python development experience
• Strong experience with FastAPI and SQLAlchemy
• Deep knowledge of PostgreSQL (schema design, indexing, optimization)
• Experience with Docker and microservice architecture
• Hands-on experience with LangChain and RAG systems
• Experience with vector databases (preferably pgvector)
• Strong understanding of embeddings, prompt engineering, and AI orchestration
• Experience with Celery, Redis, RabbitMQ
• Practical experience with document extraction / NLP systems
• Experience working in regulated industries (healthcare, fintech, life sciences, etc.)
• Strong architectural and system-design mindset
• Upper-Intermediate+ English

Nice to have

• Experience with GxP or healthcare-compliant AI systems
• Experience with AI explainability and auditability
• Familiarity with Ruff, Poetry, pre-commit hooks
• Experience scaling AI-heavy platforms

Team

You’ll collaborate with:

• ML Architect
• Senior ML/Python Engineer
• Frontend Engineer
• QA Engineer
• BA & PM

This is a high-impact role where you’ll directly influence the architecture of a complex AI healthcare platform.

📩 If you have strong Python + NLP/RAG expertise and want to work on meaningful AI systems in healthcare — apply now.

LineUp is a fast-growing IT outsourcing company with 13 years of experience. We are currently looking for a Middle Backend Develope to join a long-term product project.

You will become part of the Smart City ecosystem - a large-scale software product for the Middle East market. This is a fully agile, product-oriented environment with real users and a tangible impact on urban infrastructure.
 

Key Responsibilities:

• Develop and maintain robust backend applications using Node.js and NestJS in a monorepo and microservices environment.
• Embrace and operate within a T-shaped approach, being ready to extend expertise beyond backend tasks to ensure end-to-end delivery of features.
• Work with PostgreSQL (AWS RDS) and Redis to design, implement, and optimize database and caching solutions.
• Develop and maintain integrations with various AWS services including SQS, S3, Lambda, IAM, System Manager, EC2, and EKS/ECS for cloud-native applications.
• Contribute to containerization and deployment processes using Docker, including building images and pushing to registries, implementing and maintaining CI/CD pipelines using GitLab runners.
• Implement and configure monitoring and observability using Prometheus and Grafana to ensure system health and performance.
• Collaborate closely with stakeholders and other developers to understand business requirements, translate them into high-quality technical solutions that meet those needs.
• Troubleshoot and debug backend issues, optimizing code to enhance performance and maintainability.
• Participate in the agile development process, contributing to scram events, fostering a collaborative and cross-functional team environment.
• Stay current with the latest technologies and best practices, and promote continuous learning and self-development within the team. Mentor other team members, providing guidance and sharing your knowledge.

Qualifications:

• Minimum of 2 years of experience in backend development with a focus on Node.js, NestJS, and related technologies.
• Knowledge or experience in Frontend development (specifically Next.js) is a significant plus.
• Knowledge or experience with automated tests (integration, E2E) is a significant plus.
• Willingness and mindset to work in a T-shaped model, contributing to various stages of the development lifecycle.
• Familiarity with microservices architectures and monorepo environments.
• Experience with PostgreSQL (AWS RDS), Redis, and backend data management.
• Knowledge of AWS services including SQS, S3, Lambda, IAM, EC2, and EKS/ECS.
• Understanding of Docker and CI/CD pipelines, with some experience using GitLab runners.
• Familiarity with monitoring tools such as Prometheus and Grafana.
• Ability to document backend designs and processes clearly.
• Strong problem-solving skills and attention to detail, with a drive to create high-quality, performant code.
• Ability to work both independently and as part of a team in an agile environment.
• Good communication skills, with the ability to interact professionally with team members and stakeholders.
• English at Upper-Intermediate level and above.

What We Offer:

• Competitive salary.
• A collaborative and innovative work environment.
• Professional development opportunities.
• The chance to work on exciting and challenging projects.
• A supportive company culture.

LineUp is a fast-growing IT outsourcing company with 13 years of experience. We are currently looking for a Middle Fullstack Developer to join a long-term product project.

You will become part of the Smart City ecosystem - a large-scale software product for the Middle East market. This is a fully agile, product-oriented environment with real users and a tangible impact on urban infrastructure.

Key Responsibilities:

• Develop and maintain solutions using Node.js, NestJS, React, and Next.js.
• Build and manage microservices and monorepo environment architectures on the backend.
• Design, implement, and optimize database solutions using PostgreSQL (AWS RDS) and caching with Redis.
• Work with various AWS services including SQS, S3, Lambda, IAM, EC2, and EKS/ECS to build scalable and efficient cloud-based solutions.
• Contribute to containerization and deployment processes using Docker, including building images and pushing to registries, implementing and maintaining CI/CD pipelines using GitLab runners.
• Utilize state management tools like Zustand or similar, and integrate frontend applications with backend services using TanStack (React Query) or other data-fetching libraries.
• Ensure UI/UX consistency by leveraging component libraries such as PrimeReact or similar and building reusable components.
• Implement monitoring and observability for applications using Prometheus and Grafana to ensure system reliability and performance.
• Participate in the agile development process, contributing to scram events, fostering a collaborative and cross-functional team environment.

• Stay current with the latest technologies and best practices, and promote continuous learning and self-development within the team. Mentor other team members, providing guidance and sharing your knowledge.

   

Qualifications:

• Minimum of 3 years of experience in backend and frontend development with a strong focus on Node.js, NestJS, React, Next.js, and related technologies.
• Experience with microservices architectures and monorepo environments will be a plus.
• Proficiency in PostgreSQL (AWS RDS), Redis, and backend data management.
• Familiarity with AWS cloud services including SQS, S3, Lambda, IAM, EC2, and EKS/ECS.
• Understanding of Docker, CI/CD pipelines, and experience with GitLab runners.
• Experience with frontend state management libraries (e.g., Zustand) and data-fetching tools like TanStack (React Query).
• Familiarity with component libraries such as PrimeReact or similar, and a working knowledge of React hooks.
• Ability to document architectures, designs, and processes clearly.
• Excellent problem-solving skills and attention to detail, with a passion for creating high-quality, performant code.
• Ability to work effectively both independently and as part of a team in an agile environment.
• Good communication skills, with the ability to interact professionally with team members and stakeholders.

• English at Upper-Intermediate level and above.

   

What We Offer:

• Competitive salary.
• A collaborative and innovative work environment.
• Professional development opportunities.
• The chance to work on exciting and challenging projects.
• A supportive company culture.

Join us in delivering excellence through agility and innovation!

Location: Remote (Europe)
Experience Level: 5+ years

About the Project
We are looking for a Senior Backend Developer (close to Architect level) to design and build core backend services for the ORA platform. The role is focused on secure cloud integration using KMIP and Barbican, with strong involvement in cryptography, Kubernetes, and open-source technologies.

Key Requirements

Must have:

• Senior-level experience in backend development with Java, Golang, or Python
• Proven hands-on experience in crypto-related projects (clearly visible in CV)
• Strong understanding of cryptography, including TLS and data encryption
• Practical expertise with Kubernetes (infrastructure and management layers)
• Experience working with OpenStack
• Solid background in unit and integration testing
• Experience designing and maintaining distributed systems and core backend services
• English level: Upper-Intermediate / Advanced (C1+)

Nice to have (at least one of):

• Experience with KMIP and key management systems
• Knowledge of Barbican or similar solutions
• Understanding of cloud convergence and ORA architecture
• Experience with microservices scalability and performance optimization
• Familiarity with open standards and open-source integrations

Tech Stack
Java, Golang, Python, Kubernetes, OpenStack, Unit Testing, Integration Testing

Responsibilities

• Design and develop core backend services for ORA
• Integrate with KMS via KMIP (e.g., Barbican, Ceph)
• Build and manage Kubernetes-based infrastructure (CRDs, operators, controllers)
• Implement secure communication using TLS and encryption mechanisms
• Collaborate with architecture and infrastructure teams
• Develop and maintain unit and integration tests
• Participate in architectural decisions and provide technical leadership

Senior Python Engineer (AI-driven Recommendation Platform, iGaming domain)

About the Product

We are developing an AI-powered performance optimization platform for online casinos and sportsbooks. The solution helps operators improve key business metrics by increasing player engagement and loyalty through personalized recommendations and predictive analytics.

The platform collects and processes player behavior data across multiple systems, builds detailed user profiles, and generates actionable insights, including:

• identifying players who misuse bonus programs without long-term retention
• detecting patterns of risky or excessive gaming to support responsible play
• recommending relevant games and activities based on user preferences and behavioral history

You will join a team building scalable recommendation systems, working with large volumes of data, and implementing ML-driven personalization to enhance user experience within iGaming products.

Requirements

• 5+ years of backend development experience with Python
• Strong foundation in mathematics, statistics, or computer science
• Hands-on experience with FastAPI, Django, or Flask
• Solid knowledge of data structures, algorithms, and distributed systems
• Experience with SQL and NoSQL databases (PostgreSQL, Redis, DynamoDB, MongoDB, etc.)
• Practical experience with Kafka or RabbitMQ and asynchronous architectures
• Cloud experience with AWS (Lambda, S3, RDS, SQS, etc.)
• Experience designing and maintaining high-load, scalable systems
• English level — B2 or higher

Nice to Have

• Experience with recommendation systems, data analysis, or ML-based personalization
• Understanding of data pipelines and ETL processes
• Experience with Kubernetes, Docker, and CI/CD pipelines
• Familiarity with Elasticsearch and monitoring/visualization tools (Grafana, Kibana)

Responsibilities

• Design and develop scalable backend services for AI-powered recommendation systems
• Collaborate with data scientists and ML engineers to deploy models into production
• Optimize data storage, processing, and retrieval for large-scale user datasets
• Ensure system reliability, performance, and scalability
• Take part in architectural discussions, code reviews, and mentoring
• Contribute to new features aimed at increasing player engagement and retention

Tech Stack

Python, FastAPI, Django, Flask, Kafka, RabbitMQ, PostgreSQL, Redis, DynamoDB, AWS (Lambda, S3, RDS, API Gateway, CloudWatch), Kubernetes, Pandas, NumPy, SQLAlchemy, Celery, Elasticsearch, Prometheus, Grafana.

Company
The company specializes in lead generation within the iGaming domain, primarily through SEO-driven solutions. They work on long-term client projects and are currently expanding their internal development team.

Position Overview

We are looking for a Lead / Senior Full-Stack Engineer who operates at a true senior / lead level — not by years of experience, but by depth of expertise and ownership.

This role is for someone who:

• takes full ownership of complex systems
• makes architectural decisions
• builds scalable solutions (not just features)
• sets and raises engineering standards within the team

Location & Format

• Remote
• EU time zone required
• Full-time, long-term cooperation

Language Requirements

• English — required for daily communication
• Strong English is a significant advantage

Team & Projects

You will join a stable team working on long-term lead generation platforms.

This is not a task-execution role. We expect you to:

• take ownership of complex technical decisions
• improve architecture and system performance
• raise the overall engineering bar within the team

Tech Stack

• PHP (Symfony)
• WordPress
• JavaScript
• HTML / CSS

Key Requirements

WordPress (must-have, advanced level)

• Experience building complex, large-scale WordPress systems (not content websites)
• Hands-on experience with WordPress Multisite (production)
• Strong experience with custom plugin development, including:
  • OOP
  • Composer / autoloading
  • Typed properties
• Experience with:
  • custom database structures
  • custom caching strategies (not plugin-based)
  • advanced use of WP_Query
  • improving developer & admin tooling

👉 If your experience is mostly theme customization or plugin usage — this role is not a fit.

PHP (strong senior level required)

• 5+ years with modern PHP (8+)
• Ability to design abstractions, libraries, and internal frameworks
• Experience with:
  • phpcs / phpcbf
  • custom sniffs OR PHPParser / AST
  • reflection & introspection
  • DTOs, Value Objects, clean architecture principles

Frontend / CSS

• Strong modern CSS skills (must-have)
• Understanding of browser rendering, layout, and performance

Performance & Optimization (critical)

• Deep understanding of Core Web Vitals
• Real experience with performance optimization (not just tools/plugins)
• Ability to identify bottlenecks and design custom solutions

Mindset & Approach

We are looking for engineers who:

• think analytically and architecturally
• deeply understand systems, not just tasks
• challenge “working solutions” and improve them
• proactively raise engineering standards

👉 If you mainly execute tasks and rely on predefined solutions — this role is not a fit.

AI Usage

• AI is allowed, but must not be a dependency
• Strong preference for engineers with deep system understanding
• AI-generated communication is discouraged

Start Date

• ASAP

This is not a “build everything from scratch” role.
The main focus is working with legacy systems, understanding existing architecture, supporting ongoing development, fixing issues, and gradually improving the platform together with the team.

## Requirements
* Min. 5+ years of commercial experience with C# / .NET
* Good experience with legacy enterprise applications
* Experience supporting and improving existing systems
* Solid knowledge of ASP.NET / .NET Core
* Experience with SQL databases
* Frontend experience with Angular or React
* Understanding of APIs and microservices
* Experience with cloud environments is a plus (Azure or AWS)

## Nice to have
* Experience with Docker / CI/CD
* Experience with message brokers or distributed systems
* Understanding of modernizing monolithic applications
* Experience in enterprise or long-term support projects

## Responsibilities
* Support and maintain existing applications
* Analyze and fix production and business issues
* Develop new features in existing systems
* Participate in gradual modernization and refactoring
* Collaborate with product owners, QA, and other developers
* Write clean and maintainable code
* Participate in technical discussions and code reviews

Location: Remote /Ukraine/ Europe preferred
German language — B1-B2 level
English — good working level

Domain: Banking & Finance
Experience: 6+ years
Project Duration: June 1, 2026 – December 31, 2026
Format: Hybrid
Location: Kraków, Poland

About the Project

We are looking for a React Developer to join a team building modern digital solutions for an international financial services company.

The role focuses on developing responsive and user-friendly frontend applications, collaborating closely with product and design teams, and delivering high-quality user experiences in a dynamic engineering environment.

Responsibilities

• Develop modern and responsive frontend applications using React.js
• Prototype and iterate quickly on new features with a strong focus on usability and user experience
• Collaborate closely with product managers and design teams to improve and refine the user journey
• Integrate frontend applications with REST APIs and backend services
• Follow modern frontend development standards and best practices using JavaScript and CSS
• Create wireframes, mockups, and UI concepts using design and prototyping tools
• Contribute to code quality, performance optimization, and frontend architecture improvements

Requirements

• Strong proficiency in JavaScript, TypeScript, HTML5, and CSS3
• Hands-on commercial experience with React.js
• Good understanding of responsive design and modern UI/UX principles
• Experience integrating REST APIs and working with backend services
• Familiarity with state management solutions and component-based architecture
• Knowledge of modern frontend tooling and build systems
• Understanding of frontend performance optimization and debugging techniques
• Ability to work effectively in cross-functional teams
• Strong written and spoken English communication skills

Nice to Have

• Experience with LangChain
• Experience with LangGraph
• Familiarity with LangSmith
• Knowledge of ETL and data management tools

Tech Stack

• JavaScript
• TypeScript
• React
• HTML5
• CSS3
• REST APIs

Preferred Technologies

• LangChain
• LangGraph
• LangSmith
• ETL & Data Management Tools

Location

• Hybrid from Kraków, Poland
• Important: the client requires office visits in Kraków once per week

Recruitment Process

• Technical interview with external partner
• 1.5-hour technical interview with the end client
• Cultural fit interview

We're looking for a Middle/Middle Strong Node.js developer with 3+ years of experience to join our team and contribute to an innovative project focused on transforming HR operations with AI. This is a fantastic opportunity to work on a platform that integrates with existing HR systems, handles a significant volume of employee requests, and automates various HR tasks, ensuring 24/7 personalized support across multiple communication channels.

Must have:

• Strong experience with TypeScript, Node.js, and PostgreSQL.
• Proven experience with AI/LLM integration.
• Solid understanding of backend architecture and API design principles.
• Product mindset with the ability to think beyond implementation details.
• Proactiveness and ownership mentality.
• Strong communication skills and ability to collaborate with cross-functional teams.
• Ability to work effectively in ambiguous environments and help define clear requirements.
• Experience working in startup environments.

• Upper - Intermediate or Advanced English communication skills.

   

Will be a plus:

• Experience with Microservices architecture;

   

Responsibilities:

• Develop and maintain high-quality backend services using Node.js and TypeScript.
• Design and implement robust integrations with AI/LLM models to enhance platform capabilities.
• Work with PostgreSQL to manage and optimize application data.
• Collaborate with cross-functional teams to deliver seamless and efficient HR solutions.
• Ensure the scalability, performance, and security of the platform.

• Participate in code reviews, contribute to architectural discussions, and drive continuous improvement.

   

 About the Project:

This intelligent HR automation ecosystem is designed to modernize workforce management by offloading high-volume administrative tasks. By syncing with internal directories and knowledge hubs, the system autonomously resolves nearly three-quarters of routine employee inquiries regarding compensation, corporate policies, and internal workflows. Beyond simple Q&A, it orchestrates end-to-end processes—from record updates to document generation—across global communication channels like Teams and Slack. The result is a 24/7 support layer that provides data-driven organizational insights while escalating high-priority cases to human experts.

Interview Stages

• 1-st stage - call with Recruiter
• 2-nd stage - Technical interview with our Senior developer
• 3-rd stage - Client interview

We are looking for a Software Engineer with strong backend expertise to strengthen our engineering team at a successful web project from the USA.

As a Software Engineer, you will contribute to building and enhancing the platform within a collaborative engineering team. While the current stack includes Angular and Node.js, the strategic goal is to expand backend capabilities and strengthen collaboration with engineering and ETL teams.

Depending on project priorities, you may initially focus on Angular/Node.js features, while gradually contributing more to backend services and integrations, where .NET/C# experience will be valuable. You should be comfortable working across the stack when needed.

Our ideal candidate:

• Is comfortable working across both frontend and backend when needed
• Brings strong backend engineering experience
• Can help increase the technical seniority of the team
• Is proactive and capable of contributing to technical direction and system design
• Demonstrates strong ownership and problem-solving skills
• Is collaborative, comfortable working in ambiguous environments, able to mentor others, and raise the overall technical maturity of the team

Requirements

Must have

• 5+ years of professional software development experience.
• Strong experience in backend development.
• Hands-on experience with Node.js and Angular.
• Previous or current experience with .NET / C#.
• Experience designing and implementing backend services or APIs.
• Strong problem-solving skills and the ability to work with complex systems.
• Upper-Intermediate English (B2+) or higher.
• Proactive mindset and ability to take ownership of technical solutions.

Will be a plus

• Experience with AWS or other cloud platforms
• Experience working with healthcare systems or regulated environments
• Experience with SQL and/or NoSQL databases (e.g., MySQL, MongoDB)
• Mentorship or technical leadership experience

Responsibilities

• Develop and maintain features using Angular and Node.js (Express).
• Contribute to backend services and system architecture where applicable.
• Strengthen the team's backend expertise and engineering maturity.
• Collaborate with engineering and ETL teams on integrations and data-related workflows.
• Participate in architecture discussions, code reviews, and technical decision-making.
• Identify opportunities to improve system scalability, reliability, and maintainability.
• Share knowledge and support other engineers when needed.

About Project

Our client is a Software company from the USA.

Product

This platform is dedicated to ensuring payment integrity for health payers. Our project focuses on creating and implementing cutting-edge technology solutions to tackle current and future challenges in the healthcare industry for health plans. By bringing together payers, providers, and business partners on one technology platform, we aim to facilitate transparent communication and support collaboration.

Stage

Active phase of development

Project team

Existing team on the client side. We work with the US team (Eastern and Central time zones) — around 10 people. Our team is 17 people (9 MEAN stack developers, 8 QA, 1 PM)

Project Technologies

MEAN (MongoDB, Express. js, Angular and Node.js)

Work schedule

Full-time working day (flexible hours), possibility to work remotely or visit our offices in Lviv, Kyiv or Krakow.

Interview Stages

1-st stage — Call with Recruiter (30 minutes)
2-nd stage — Interview with our Senior Engineer (1 hour)
3-rd stage — Client interview

TemaBit Fozzy Group is an IT company that develops unique solutions for more than 40 businesses of Fozzy Group. We specialize in web and mobile development, as well as software for managing business processes and infrastructure projects.

In addition, we experiment and care about the team and the Guest, we value cooperation, we preach honesty and openness.

You will play a key role in the development and evolution of a large-scale enterprise platform focused on backend services, business process automation, and integrations between multiple internal and external systems.

The project combines existing enterprise applications with modern backend services developed using .NET 6–10. While the system heavily relies on Microsoft SQL Server, the strategic direction is to gradually move business logic from database-level implementations into maintainable and scalable C# backend services.

This role is primarily focused on backend development using modern .NET technologies, with SQL Server serving as an important part of the overall architecture.

Key Responsibilities:

• Design, develop, and maintain backend services and APIs using modern .NET technologies (.NET 6+)
• Implement and maintain business logic in C#
• Collaborate with engineering teams on system design, integrations, and modernization initiatives
• Work with Microsoft SQL Server and existing database-level business logic
• Analyze existing SQL-based processes and participate in migrating business logic into backend services
• Develop and maintain integrations using REST APIs and other enterprise integration patterns
• Participate in architecture discussions and implementation of microservice-based solutions
• Follow engineering best practices including code reviews, testing, and CI/CD processes
• Support junior and middle developers through technical guidance and collaboration

• Leverage AI-powered development tools (e.g. GitHub Copilot, ChatGPT, Amazon Q) to improve productivity and development workflows

   

Requirements:

• 5+ years of commercial .NET development experience
• Strong experience with modern .NET (.NET 6/7/8+)
• Strong understanding of backend application architecture and API development
• Solid experience with C#
• Good practical knowledge of Microsoft SQL Server and Transact-SQL
• Experience working with existing SQL-based business logic and integrations
• Experience with EF Core and/or Dapper
• Experience with REST APIs and backend integrations
• Experience with unit/integration testing
• Experience using AI-powered development tools to enhance productivity, code quality, and testing efficiency
• Experience with Docker
• Understanding of software architecture and modernization approaches
• Understanding of Agile/Scrum methodologies and experience working in an Agile environment
• Intermediate/B1 English level

• Strong communication and problem-solving skills

   

Nice-to-have Skills & Experience:

• Experience with AWS Cloud Native development and familiarity with AWS services (e.g. Lambda, API Gateway, S3, Fargate)
• Experience with .NET Framework 4.8
• Experience with Windows Forms applications
• Experience with WCF services
• Experience with DevExpress UI components
• Experience with GitLab CI/CD pipelines

We propose:

• The ability to generate and influence decision-making
• Competitive salary discussed based on the results of the interview with the successful candidate
• Medical insurance
• Discounts for network employees
• Remote work mode, and if you want to work in the office — there is a cozy co-working space in the Silver Breeze business center in Kyiv

TemaBit Fozzy Group is an IT company that develops unique solutions for more than 40 businesses of Fozzy Group. We specialize in web and mobile development, as well as software for managing business processes and infrastructure projects.

In addition, we experiment and care about the team and the Guest, we value cooperation, we preach honesty and openness.

You will play a major role in our engineering team by designing, developing, and maintaining high-quality backend systems and applications. Your expertise in .NET and Cloud Native development, coupled with a solid understanding of backend architectures, will drive the creation of scalable, efficient, and secure software solutions.

In this role, you will also leverage modern AI-powered tools and practices to improve productivity, code quality, and decision-making across the software development lifecycle.

Key Responsibilities:

• Develop backend systems using .NET (with focus on Cloud Native development), ensuring code quality, performance, and scalability
• Collaborate within cross-functional engineering team to design and develop high-quality web applications
• Drive engineering excellence by adopting and following engineering best practices in your team
• Participate in the entire software development lifecycle, from concept to deployment
• Contribute to the architecture and implementation of scalable and efficient solutions
• Support junior and middle developers, guiding them through code reviews, and fostering a culture of continuous learning and improvement
• Leverage AI-driven tools (e.g., GitHub Copilot, Amazon Q, ChatGPT) to assist in coding, documentation, testing, troubleshooting, and optimizing development workflows
• Promote responsible and ethical AI usage, ensuring compliance with company policies and data privacy standards

Requirements:

• 4+ years of .NET development
• Proficiency in .NET 8+
• Experience using AI-powered development tools to enhance productivity, code quality, and testing efficiency
• Experience of AWS Cloud Native development, familiarity with AWS services (i.e. Lambda, API Gateway, S3, Fargate)
• Track record of implementing microservices based back-ends
• Knowledge EF Core / RDS Postgres
• Knowledge of messaging (preferable Kafka) 
• Knowledge of DDD, Event Sourcing, CQRS
• Understanding of relational and non-relational databases
• Experience with Unit/Integration testing
• Experience with containerization technologies (Docker)
• Understanding of Infrastructure as Code principle (experience with CDK will be a plus)
• Understanding of Agile/Scrum methodologies and experience working in an Agile environment
• Intermediate/B1 English Level, ability to read & write tech documentation
• Strong communication skills

Nice-to-have Skills & Experience:

• Experience building Gitlab CI/CD pipelines
• Experience with DynamoDB
• TypeScript

We propose:

• The ability to generate and influence decision-making
• Competitive salary discussed based on the results of the interview with the successful candidate
• Medical insurance
• Discounts for network employees
• Remote work mode, and if you want to work in the office — there is a cozy co-working space in the Silver Breeze business center in Kyiv

About us
We are an outsourcing company partnering with fintech and crypto businesses. The Middle React Native Fullstack Engineer’s role is part of a client project specializing in cryptocurrency. You’ll be the second mobile engineer in the team.


Requirements:
NodeJS Back End Experience: 3+ years of software development experience with NodeJS.
React Native Expertise: 2+ years of hands-on experience.
Blockchain Experience: 1+ years of hands-on experience with blockchain-related products or technologies.
Application Lifecycle: Experience managing the complete mobile application lifecycle, from development through deployment.
Performance Optimization: Understanding of mobile application performance optimization techniques and debugging approaches.
Communication Skills: Strong spoken and written English communication skills.
Languages: English — B1+ for effective daily communication with clients and team members.


Responsibilities:
Mobile Development: Develop, maintain, and improve mobile features for the platform using React Native.
Code Quality: Follow engineering best practices for maintainable, secure, and well-documented code.
Platform Support: Maintain and support production mobile applications, ensuring stability and resolving issues when needed.
Architecture & Technical Decisions: Make key engineering and architectural decisions to ensure scalable, maintainable, and high-performing mobile solutions.
Performance Optimization: Continuously analyze and improve application performance, responsiveness, and resource efficiency.
Collaboration: Work closely with mobile engineers, product and project  and other team members to deliver product initiatives.

 

Conditions and benefits:

Remote-friendly culture: Work from anywhere in the world with a flexible schedule in CET timezone;

Opportunities for growth: Take advantage of paid training, English-speaking clubs, support for certifications, and participation in professional events;

Reliable conditions: Transparent terms, stable compensation, and consistent support;

Room for ideas: We work in teams with full autonomy, empowered by our clients to take complete ownership of our projects.