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September 2, 2026

Senior Full Stack Engineer

Senior • On-site

Kraków, MA, Poland

Role overview

This is a full-time position (40 hours per week) for a Senior Full Stack Developer supporting a British wholesale distributor. Office work is expected 2–3 days per week.

Responsibilities

  • Build user interfaces using TypeScript and React.
  • Build and maintain Backend for Frontend (BFF) services to orchestrate API calls and shape data for user-interface needs.
  • Integrate APIs, LLM services, and streaming endpoints to deliver product features.
  • Design and implement scalable, maintainable frontend architecture.
  • Ensure performance, responsiveness, and an optimal user experience across the application.
  • Implement error handling, loading states, and resilience patterns for distributed systems.
  • Collaborate with product and engineering teams to bring concepts from prototype to production.

Requirements

  • Strong hands-on experience with TypeScript development.
  • Several years of experience in software engineering, ideally with a strong focus on React and modern frontend development tools.
  • Experience with frontend testing, including unit and integration testing.
  • API design and development experience using NestJS and Node.js.
  • Understanding of server-side rendering, Server Components, CDN strategies, and caching.
  • Solid understanding of software architecture, clean code, and system design.
  • Ability to work effectively in environments with a high degree of uncertainty and take a pragmatic, solution-oriented approach to problem-solving.
  • Experience with Docker, Git, CI/CD, and Azure.

Nice to Have

  • Knowledge of GraphQL APIs.
  • Experience with state management libraries, such as Zustand and React Query.
  • Familiarity with Python, particularly when working with backend services or AI-powered systems.
  • Experience building data-intensive or real-time user interfaces.
  • Familiarity with designing user experiences for AI-powered features or non-deterministic outputs.

We offer

  • US and EU projects based on advanced technologies.
  • Competitive compensation based on skills and experience.
  • Regular performance appraisals to support growth.
  • Flexible workspace options: remote or office-based.
  • Comprehensive medical insurance after one month.
  • MultiSport card with access to 2,500 sports facilities across Poland.
  • Bonuses for referring new employees.
  • Bonuses for article writing, public talks, and other activities.
  • 15 vacation days, 10 national holidays, 10 sick days, and family days off.
  • Personalized learning program tailored to individual interests and skill development.
  • Free tech webinars and meetups.
  • Welcome and anniversary presents, gifts for children, and more.
  • Regular corporate events and meetups.
  • Friendly, supportive team community.

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