15h Left! Senior Mobile Engineer (React Native)

Role Summary

You will lead the end-to-end delivery of high-impact mobile features for our React Native applications across iOS and Android. This includes architecture and design, hands-on implementation, automated testing, release management, and post-release observability. You’ll mentor teammates, champion best practices, and help shape our mobile engineering culture. Your work will directly influence how millions of users experience our product on their devices.

What You’ll Do

• Own Features End-to-End : Work with product, design, and backend teams to scope, architect, implement, test, and ship mobile features that delight users.
• Drive Performance & Reliability : Optimize startup time, memory usage, bundle size, frame stability (jank / dropped frames), crash-free sessions, and ANR (Application Not Responding) rates.
• Ensure Robust Quality : Set and enforce coding standards, perform thorough code reviews, write meaningful unit / integration / E2E tests, and advocate for continuous improvement.
• Instrument & Observe : Implement analytics, crash / error reporting, logging, and monitoring (e.g., with Firebase Crashlytics, Bugsnag, Sentry, OpenTelemetry). Build dashboards / alerts to keep the app healthy in production.
• Ship Confidently : Manage feature flags, staged rollouts (Play Store, TestFlight), app store submissions, and hotfixes when necessary.
• Mentor & Lead : Coach junior and mid-level engineers, participate in interviews, and contribute to engineering best practices and technical roadmaps.
• Collaborate Across Functions : Partner with designers on UX feasibility, product managers on requirements and trade-offs, QA on test strategy, and backend teams on API contracts.

Must-Have Qualifications

Experience Level : 5+ years overall software engineering experience, with 3+ years building and shipping React Native apps at scale

Nice to Have

How You’ll Work