TL;DR

React Native Developer (Mobile Development): Building and maintaining mobile applications for iOS and Android with strong execution and attention to detail. Focus on performance, stability, and seamless API integration to deliver a fast, reliable, and polished experience.

Location: Must be located within approximately ± 4 hours of CET (Central European Time)

Company

Ruby Labs is a leading tech company that creates and operates innovative consumer products across the health, education, and entertainment industries.

What you will do

Deliver new mobile product features with strong execution and attention to detail.
Maintain and improve the React Native codebase, performance, and stability.
Integrate with backend APIs, caching layers, and real-time services.
Debug production issues, investigate edge cases, and ship fixes quickly.
Optimize app performance across rendering, navigation, memory usage, latency, and offline behavior.
Support improvements to builds, releases, testing, and app store deployments.

Requirements

3–5+ years of experience building mobile applications.
Strong production experience with React Native.
Deep understanding of React fundamentals (hooks, context, component lifecycle, rendering behavior).
Experience shipping and maintaining apps on the App Store and Google Play.
Strong grasp of software development fundamentals and best practices.
Ability to debug and fix issues confidently in production.

Nice to have

Experience working in startup or high-ownership product teams.
Familiarity with backend services (Node.js, AWS, Redis, Cloudflare) to enable seamless API integration.
Experience contributing to or building mobile design systems or shared component libraries.

Culture & Benefits

Enjoy the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
Unlimited paid time off to recharge and prioritize your well-being, without counting days.
Celebrate and relax on national holidays with paid time off to unwind and recharge.
Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities with a Flexible Independent Contractor Agreement.

Hiring process

Recruiter Screening (40 minutes)
First Interview (30 minutes)
Technical Interview (45 minutes)
Final Interview (30 minutes)