Senior React Native Developer

Stack

Responsibilities

• ▹Contribute to the development and delivery of new mobile product features
• ▹Maintain and improve the existing React Native codebase, performance, and stability
• ▹Define and evolve mobile architecture, system design, and technical strategy
• ▹Set reliability, performance, and observability standards for mobile
• ▹Own production debugging, incident investigation, and root cause analysis
• ▹Improve build systems, CI/CD, releases, testing, and app store deployments

Requirements

• ▹5+ years building mobile applications, with significant React Native experience
• ▹Strong understanding of mobile system design, component architecture, and state management
• ▹Experience optimizing UI performance, memory usage, and rendering efficiency
• ▹Deep knowledge of React internals (hooks, reconciliation, lifecycle, render cost)
• ▹Experience with native modules and iOS/Android bridging
• ▹Shipped and maintained apps on the App Store and Google Play
• ▹Experience with CI/CD, release automation, and OTA updates (EAS, CodePush, or similar)
• ▹Experience with monitoring and observability (Sentry, OpenTelemetry, crash reporting)

Nice to have

• ▹Experience in startup or high-ownership product teams
• ▹Experience scaling real-time or multi-region mobile architectures
• ▹Experience building design systems or shared component libraries
• ▹Experience improving mobile security, analytics, and performance profiling

Soft skills

About the company

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