Middle Frontend Developer

    Wrocław
    Full-Time
    Mid (3-6 yrs)
    Engineering & Development
    Posted on September 22, 2026

    We’re looking for a Frontend Developer to build and improve applications for our US clients - from early-stage MVPs to established products in FinTech, SportsTech, MedTech, and other industries.

    TypeScript, React, and Node.js are our bread and butter. We value strong application development fundamentals, engineering judgment, and the ability to learn the tools a project needs.

    We’re building a team of engineers who can contribute across the application while developing deep expertise in frontend or backend engineering. In this role, frontend is your primary discipline, and you’ll broaden your contribution across the stack as your experience grows.

    AI-assisted development is part of this role. You’ll use it to explore solutions, implement features, and improve your workflow, while taking responsibility for understanding, testing, and maintaining the code you ship.

    Contract summary:
  1. Rate: PLN 9.000 - 15.000 + VAT / month (B2B)
  2. Contract: B2B/UZL, no-service days, 100% remote (or hybrid/onsite-as you prefer), Polish time zone, flexible hours, full-time position, long-term contract
  3. Perks and Benefits: 3,000 PLN annual training budget, Multisport, Luxmed, Cafeteria Platform, Tech-talks, Learning sessions, and more
  4. Tools you’ll use: Apple MacBook Pro, Slack, Google Workspace, GitHub, Jira, Coda, FigJam, AI tools
  5. Your future tasks:
  6. Develop and maintain applications, taking ownership of well-defined features from understanding requirements through implementation, deployment, and verification
  7. Build responsive, accessible interfaces with attention to design details, performance, and user experience
  8. Implement straightforward backend changes within established application patterns, including APIs, business logic, and data handling, with review and support for unfamiliar or complex areas
  9. Understand how the interface, backend, and data fit together, and diagnose issues across those boundaries
  10. Use AI coding assistants in your daily work, providing clear context, critically reviewing generated code, and validating the results
  11. Write clean, maintainable code
  12. Choose and implement appropriate tests for application behaviour, including integration points and important user flows
  13. Follow features through deployment, verify their behaviour, and use logs and error monitoring to investigate issues
  14. Collaborate with designers, developers, QA, and product owners; discuss client needs and propose practical solutions
  15. Participate in code reviews, document important decisions, and share knowledge with the team
  16. About you - Tech skills & Experience:
  17. At least 2 years of commercial experience building and maintaining web applications
  18. Strong JavaScript and TypeScript fundamentals, with a practical understanding of HTML, CSS, and browser behavior
  19. Experience delivering application features involving user interactions, forms, and API integration
  20. Experience organising frontend code into maintainable components, managing application state, and investigating accessibility and performance issues
  21. Understanding of HTTP, client–server communication, authentication, and error handling
  22. Experience with a modern frontend framework and the ability to transfer your knowledge between tools and codebases
  23. Confidence testing and debugging applications, including investigating unfamiliar code and understanding why a solution works
  24. Ability to implement straightforward backend changes within an existing application, such as an API endpoint, input validation, or data access, with review and support for unfamiliar or complex areas
  25. Practical experience using AI coding assistants: breaking work into clear tasks, evaluating their suggestions, and checking correctness through code review and testing
  26. Familiarity with Git, build tooling, and container-based development environments
  27. Experience working with CI/CD workflows: running automated checks, investigating build and test failures, and deploying changes through an established pipeline
  28. About you - Soft skills:
  29. Care about user needs and the business value of what you build
  30. Able to independently deliver well-defined features, clarify ambiguity, and ask for support when needed
  31. Communicate progress, trade-offs, and blockers clearly to teammates and clients
  32. You approach problems proactively, investigate causes, and propose solutions
  33. You welcome constructive feedback and share what you learn
  34. Open to working across frontend and backend and learning technologies beyond your current toolkit
  35. English at B2 or above for collaboration with international clients
  36. Polish at C1 for daily team communication
  37. Nice to have:
  38. Deeper backend experience with API design, database optimisation, or complex third-party integrations
  39. Experience building CI/CD pipelines, automating infrastructure, or working with cloud services beyond routine application deployment
  40. Experience with mobile applications
  41. Interest in improving AI-assisted development workflows, including working with coding agents and coordinating their tasks
  42. Experience working in Agile/Scrum teams or contributing to open-source projects
  43. Understanding of MVP development and how to balance delivery speed, scope, and maintainability
  44. Recruitment Process:
  45. CV review
  46. Phone call with our Recruiter - 15 minutes
  47. Soft-skills interview with our Recruiter - 45 min
  48. Technical interview with our Specialists - 2 hours
  49. Decision and feedback 🥳
  50. Company:  MasterBorn

    Polish-American software house building custom digital products and AI-powered products for U.S.-based clients.
    51-200 employees
    Software & IT Services
    HQ: United States