Senior Frontend Developer (React / Next.js / PWA) Location: Remote (Poland or Ukraine) | Type: B2B contract, full-time | Openings: 3
About the role We are looking for experienced Senior Frontend Developers to join a client project building a modern Progressive Web Application. You’ll work on a commercial product used in production, working closely with the client’s product and engineering teams. We want engineers who have shipped PWAs before, not just React apps.
What you’ll do
Build and maintain high-performance, responsive frontend features using React and Next.js
Design and implement PWA functionality: service workers, offline support, caching strategies, installability, and push notifications
Optimize performance (Core Web Vitals, bundle size, rendering strategies such as SSR, SSG and ISR)
Work with backend teams on API integration and data flow
Take ownership of code quality through code reviews, testing, and technical decisions
Talk directly with the client’s stakeholders in English
What we’re looking for
6+ years of professional frontend development experience
Strong command of JavaScript (ES6+), HTML5, and CSS3
Deep hands-on experience with React and Next.js in production
Proven PWA expertise, with at least one commercial PWA project you can walk us through in detail
Solid understanding of web performance, browser APIs, and responsive/mobile-first design
Experience working on your own in remote, client-facing setups
Very good spoken and written English (B2+/C1)
References from previous commercial projects
Nice to have
TypeScript
State management experience (Redux, Zustand, React Query or similar)
Testing experience (Jest, React Testing Library, Playwright/Cypress)
Accessibility (WCAG) knowledge
CI/CD and deployment experience (Vercel or similar)
