About the role: as a Senior Frontend Engineer within our Engineering team, you will be instrumental in translating complex private-market and regulatory logic (KYC, capital calls, eligibility rules) into clear, intuitive UIs. Our ideal candidate is ready to take on the challenge of ensuring high quality through testing and analytics in critical investment flows, while working under strict compliance and performance constraints. 

You will: 

• You will lead and contribute to architectural decisions for building scalable, cross-platform components in close collaboration with frontend engineers. 
• Design and implement new features across web and native user interfaces. 
• Write clean, scalable, and maintainable code using modern frontend technologies. 
• Collaborate with product, design, business stakeholders, and backend teams to deliver seamless, high-quality user experiences. 
• Contribute to the core codebase and supporting infrastructure. 

• Lokalizacja: Warszawa / Berlin; 100% zdalnie
• Zatrudnienie: przez apreel, B2B.
• Stawka: do 185zł netto/h.
• Start: asap.

Knowledge/Experience: 

• Minimum of 5 years of experience as a Frontend Engineer 
• Previous experience working in cross functional teams 
• Strong experience with clean code practices and testing 
• Experience building scalable frontend architectures 
• Familiarity with logging, monitoring, and debugging tools (e.g., Sentry) 
• Background in mobile development (React Native) 
• Deployment and DevOps experience is a plus 
• End-to-end testing expertise using tools like Playwright, or WebdriveIO to validate real-world user scenarios 
• Comfortable using AI-assisted development tools to ship high-quality code faster. 

Technical Skills: 

• React.js 18+ 
• Next.js 14+ (server-side rendering, App Router) 
• React Native (nice to have) 
• HTML, CSS, TypeScript 
• Styled Components, Tailwind 
• State Management Libraries (e.g., Redux, Jotai) 
• Storybook 
• Feature flag tools (e.g., GrowthBook) 
• AWS, Docker, Kubernetes 
• GitHub Actions, Cloudflare Pages