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Senior Frontend Developer (React)
  • Kraków
Senior Frontend Developer (React)
Kraków, Kraków, Lesser Poland Voivodeship, Polska
Fun Crafters
23. 5. 2025
Informacje o stanowisku

technologies-expected :


  • React.js
  • TypeScript
  • JavaScript
  • Mantine
  • ViteTest
  • React Testing Library
  • Cypress

technologies-optional :


  • ESLint
  • Prettier
  • Python
  • C#
  • AWS
  • Google Cloud Platform
  • Sentry
  • Docker
  • ArgoCD
  • Kubernetes
  • HTML
  • Unity 3D

responsibilities :


  • Leading frontend initiatives, defining coding standards, driving architecture and design, creating guidelines and documentation.
  • Designing and creating high-performance and visually-rich applications (e.g., server dashboards, game management UIs, live ops tools and any other tools used by developers and non technical people) ensuring responsiveness and cross-device compatibility.
  • Optimizing and enhancing front-end build performance, while ensuring seamless integration and interoperability with backend systems and APIs.
  • Reviewing and approving complex frontend pull requests, ensuring code quality, consistency, performance, accessibility, and alignment with architectural guidelines.
  • Identifying and managing technical debt, making recommendations for refactoring or improvements in code quality and system architecture.
  • Share technical expertise with less experienced developers through hands-on support and collaborative problem-solving. Promote a culture of learning by explaining architectural decisions, frontend patterns, and best practices.
  • Integrating and maintaining various APIs and third-party tools.
  • Designing, implementing, and maintaining automated tests (unit, integration, and end-to-end) to ensure the reliability and quality of frontend applications.

requirements-expected :


  • 10 Years of Experience in web application frontend development using React, TypeScript, and JavaScript in product-focused organizations.
  • Commercial experience using Vite/Jest packet manager.
  • Extensive professional experience leading front-end initiatives.
  • Experience with modern React-based UI libraries, especially Mantine.
  • Deep understanding of UI/UX principles, with experience leading UI/UX design decisions with little to no support.
  • Solid knowledge of REST APIs, including integration and data management in frontend applications.
  • Commercial experience with testing frameworks like ViteTest, React Testing Library, and Cypress.
  • Familiarity with linting and code formatting tools (e.g., ESLint, Prettier).
  • Prior mentoring experience helping less experienced developers grow their skills.
  • Proficiency in Polish and English (spoken and written) is essential for cross-functional collaboration.
  • Familiarity in utilizing AI tools in everyday work.
  • Clear Communication: Ability to simplify and articulate complex technical concepts for diverse audiences (designers, developers).
  • Active Listening: Strong listening skills to understand feedback, ideas, and concerns from team members and stakeholders.
  • Presentation Skills: Comfortable presenting ideas and updates in a clear, structured way, ensuring understanding.
  • Meeting Facilitation: Can organize and lead meetings, ensuring they stay on track and lead to actionable outcomes.
  • Cflict Resolution: Ability to mediate disagreements and foster positive collaboration.
  • Knowledge Sharing: Actively shares expertise and mentors less experienced team members.
  • Cross-Functional Collaboration: Skilled at working with diverse teams (backend, design, product) to ensure alignment.
  • Adaptability: Adjusts communication style based on context and audience, receptive to feedback.
  • Written Communication: Clear and concise in documentation, emails, and reports.
  • Fast-Paced Environment: Comfortable with rapidly changing priorities, able to adapt quickly and iterate with minimal direction.
  • Fluency in Polish and English: Strong communication skills in both languages, enabling effective collaboration across teams.

offered :


  • An epic journey in the mobile RPG gaming industry.
  • Flexible contract options: employment or B2B.
  • Remote, in-office, or hybrid work.
  • Opportunities for professional growth with a training budget.
  • A fantastic team and many company events.
  • Competitive benefits package.
  • A modern office with all the essentials.

benefits :


  • sharing the costs of sports activities
  • private medical care
  • sharing the costs of foreign language classes
  • sharing the costs of professional training & courses
  • remote work opportunities
  • flexible working time
  • fruits
  • integration events
  • corporate library
  • no dress code
  • coffee / tea
  • drinks
  • parking space for employees
  • employee referral program

  • Praca Kraków
  • Kraków - Oferty pracy w okolicznych lokalizacjach


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