Senior React / Next.js Engineer (Mobile Web Apps)
We’re looking for a Senior React/Next.js Engineer to join us on a part-time basis and build high-quality mobile-first web applications for our gaming and AI ecosystem.
All development is in mobile web, optimized for Instagram/TikTok WebView, Safari, and in-app browsers.
This is a role for someone who deeply understands modern frontend architecture, performance, and edge cases of mobile browsers.
What you’ll work on
• Building mobile-first apps in Next.js (App Router, RSC).
• Adaptive UI that behaves perfectly in WebView environments (IG/TikTok/Facebook).
• Creating premium UI with smooth animations (Framer Motion, CSS transitions, Lottie).
• Payment flows: Stripe, Paddle, Apple Pay JS, handling tokens, redirects, webhooks coordination.
• API integrations with proper error handling, retries, caching layers, optimistic updates.
• Handling URL parameters, click IDs, attribution tags, and ensuring they survive redirects & WebView limitations.
• Deep debugging of mobile browser issues:
- soft keyboard pushing layout
- safe-area insets
- viewport resizing
- Safari auto-stripping parameters
- WebView navigation quirks
• Implementing analytics events, custom tracking, deep linking.
Requirements (Senior)
• 5+ years React, and solid production experience with Next.js (App Router required).
• Strong understanding of SSR, RSC, ISR, edge runtime, caching strategies.
• Excellent adaptive/mobile layout skills — pixel-perfect on iOS Safari & WebViews.
• Proven experience integrating payment systems (Stripe/Paddle/Apple Pay).
• Deep understanding of mobile WebView limitations and how to bypass them.
• Strong async logic: hooks, SWR/React Query, fetch wrappers, error boundaries.
• Ability to design clean architecture and reusable components.
• High attention to detail and ability to deliver polished UI fast.
Nice to have
• Experience with State machines (XState) or advanced state management.
• Understanding of analytics pipelines, event tracking, attribution.
• Experience with CSP, security headers, anti-abuse techniques.
• Performance profiling (React DevTools, Lighthouse, Web Vitals).
What we offer
• Flexible part-time load (ongoing collaboration).
• Fast decision-making, no bureaucracy.
• Work on high-growth mobile gaming & AI products.
• Ownership of features end-to-end.
Salary in job for part-time!