React Developer (regular, senior)

The role is part of a high-impact project to rebuild the frontend of a large-scale financial platform. The project involves developing a new frontend layer while preserving the existing backend and business logic. The frontend application follows a decoupled architecture communicating with backend services via REST APIs, with potential future support for WebSocket and Server-Sent Events (SSE).

• Commercial experience in React development (3+ years for regular, 6+ for senior)
• Strong hands-on expertise with React, TypeScript, Vite, Material UI (MUI), and RTK Query
• Experience delivering solutions within FinTech, Banking, Financial Services, or Online Payments
• Proven experience integrating complex REST APIs and solid understanding of cookie-based authentication
• Good knowledge of WCAG 2.1, Responsive Web Design (RWD), and Progressive Web Apps (PWA)
• Experience working with Jira and technical documentation
• Ability to work independently, take ownership, and influence technical decisions
• Polish language proficiency at C1 level (mandatory)
• English proficiency at B2/C1

Nice to have:

• Experience in using AI tools in day-to-day workflow
• Experience with WebSocket or Server-Sent Events (SSE)
• Experience modernizing or replacing legacy frontend applications
• Understanding of scalable frontend architecture
• Experience with component-driven development
• Previous experience working in complex enterprise environments

• Develop a modern frontend application using React and TypeScript
• Translate approved Figma designs into high-quality, reusable UI components
• Analyze and implement approximately 220 designed screens, identifying reusable patterns, application states, and user flows
• Integrate frontend components with existing backend services via REST APIs
• Collaborate closely with developers, architects, designers, and business stakeholders
• Write clean, maintainable, and well-tested code following best practices
• Ensure excellent performance, accessibility (WCAG 2.1), and responsiveness across the application
• Participate in technical discussions and contribute to architectural decisions
• Support delivery of a scalable and future-proof frontend solution

Polish language proficiency at C1 level is mandatory.