Ruby Labs

Ruby Labs

Senior React Native Developer

EuropeRemotePosted Today
Full TimeSeniorRemote

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Job Description

About usRuby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries

Key Highlights

  • 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.
  • Partner with backend, product, and design teams to shape solutions that scale.
  • Drive reliability, performance, and observability standards on mobile.

Qualifications

Required Qualifications

  • 5+ years of experience building mobile applications, with significant React Native experience.
  • Experience mentoring engineers through code reviews, architecture, and incident response is a strong plus.
  • Strong understanding of mobile system design, component architecture, state management, navigation patterns, and performance trade-offs.
  • Experience optimizing UI performance, memory usage, rendering efficiency, and startup time.
  • Deep knowledge of React internals and rendering behavior (hooks, reconciliation, lifecycle, render cost).
  • Experience working with native modules and iOS/Android bridging.
  • Shipped and maintained apps on the App Store and Google Play.
  • Experience with CI/CD, builds, release automation, and OTA updates (EAS, CodePush, or similar).
  • Experience implementing monitoring and observability (Sentry, OpenTelemetry, crash reporting, performance tracing).
  • Demonstrated ownership of edge cases, distributed failure modes, degraded APIs, offline sync, and recovery UX.
  • Demonstrated ability to lead architecture or technical strategy for a mobile app or major feature.
  • Maintains high standards for clean code, SOLID principles, maintainability, and documentation.
  • 5+ years of experience building mobile applications, with significant React Native experience.
  • Experience mentoring engineers through code reviews, architecture, and incident response is a strong plus.
  • Strong understanding of mobile system design, component architecture, state management, navigation patterns, and performance trade-offs.
  • Experience optimizing UI performance, memory usage, rendering efficiency, and startup time.
  • Deep knowledge of React internals and rendering behavior (hooks, reconciliation, lifecycle, render cost).
  • Experience working with native modules and iOS/Android bridging.
  • Shipped and maintained apps on the App Store and Google Play.
  • Experience with CI/CD, builds, release automation, and OTA updates (EAS, CodePush, or similar).
  • Experience implementing monitoring and observability (Sentry, OpenTelemetry, crash reporting, performance tracing).
  • Demonstrated ownership of edge cases, distributed failure modes, degraded APIs, offline sync, and recovery UX.
  • Demonstrated ability to lead architecture or technical strategy for a mobile app or major feature.
  • Maintains high standards for clean code, SOLID principles, maintainability, and documentation.

Preferred Qualifications

  • Experience in startup or high-ownership product teams.
  • Experience scaling real-time or multi-region mobile architectures.
  • Experience designing or building design systems, shared component libraries, or mobile platform foundations.
  • Experience improving mobile security, analytics, performance profiling, and release automation.
  • Knowledge of edge caching, streaming real-time events, WebSockets, or offline-first architectures.
  • Experience in startup or high-ownership product teams.
  • Experience scaling real-time or multi-region mobile architectures.
  • Experience designing or building design systems, shared component libraries, or mobile platform foundations.
  • Experience improving mobile security, analytics, performance profiling, and release automation.
  • Knowledge of edge caching, streaming real-time events, WebSockets, or offline-first architectures.

Skills & Technologies

ReactCI/CDRubyGo

About the Company

Ruby Labs

Ruby Labs

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Job Details

Employment Type

Full Time

Experience Level

Senior

Location

Europe

Work Mode

Remote

Posted

Today