Senior Software Engineer
Toptal
full-time
Posted on:
Location Type: Remote
Location: Remote • 🇧🇷 Brazil
Visit company websiteJob Level
Senior
Tech Stack
AndroidiOSReactReact NativeTypeScript
About the role
- Work in a small team shipping mobile features continuously.
- Take ownership of React Native implementation from ticket to production.
- Collaborate closely with backend engineers to deliver end-to-end user flows.
- Ship fast, fix fast, and improve based on real usage.
- Build and ship React Native apps using Expo for iOS and Android.
- Implement core user flows: onboarding, authentication, payments, balances, and settings.
- Integrate backend APIs efficiently and handle loading, error, and retry states correctly.
- Focus on performance and reliability under real-world conditions (poor connectivity, retries, edge cases).
- Own releases: builds, OTA updates, store submissions, and production fixes.
- Keep the codebase clean, maintainable, and easy to extend as the product evolves.
Requirements
- 4+ years building production mobile apps, with strong React Native experience.
- Hands-on experience with Expo (managed or bare), including builds and releases.
- Strong TypeScript skills and comfort working with API-driven products.
- Solid understanding of mobile app performance, navigation, and lifecycle.
- Experience shipping frequently in fast-moving product teams.
- Fintech or payments experience is a plus, but execution matters more than domain.
Benefits
- Clear ownership and real responsibility from day one.
- Fast execution with minimal process overhead.
- Direct impact on a global financial product.
- A senior team that values shipping, quality, and learning.
Applicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard skills
React NativeExpoTypeScriptmobile app performanceAPI integrationonboardingauthenticationpaymentsbalancessettings
Soft skills
ownershipcollaborationproblem-solvingadaptabilitycommunication