Principal Full Stack Engineer – Web & Mobile
Principal Full Stack Engineer builds and maintains end-to-end customer-facing features across React web and React Native mobile apps, integrating backend APIs and optimizing performance. Requires 6+ years experience, expertise in JS/TS, React, React Native, and cross-functional collaboration.
About the job
Core Responsibilities
- Build and maintain customer-facing products using React (web) and React Native (mobile).
- Implement features end-to-end: frontend UI, backend API integration, data management, and performance optimization.
- Collaborate with product designers to create intuitive, responsive UX across multiple platforms.
- Identify opportunities to reuse components and unify shared UI patterns and tooling.
- Ensure stability and high performance on both web and mobile through testing, metrics, and monitoring.
- Contribute to backend endpoints where needed to support frontend features.
- Advocate for scalable front-end architecture and clean, maintainable code.
Qualifications
- 6+ years of professional experience building full stack applications.
- Expert in JavaScript / TypeScript with hands-on experience in React and React Native.
- Familiarity with mobile-first design principles and web/mobile performance considerations.
- Experience integrating with backend services, RESTful APIs, and real-time data updates.
- Comfortable operating across frontend and backend boundaries to ship cohesive products.
- Excellent communication skills and ability to partner with product and design teams.
What Makes You Stand Out
- Contributions to React or React Native open-source libraries.
- Experience in fintech or regulated systems with strict reliability expectations.
- Past work on consumer apps with rapid release cadences.
- Thought leadership on frontend architecture and tooling.
Skills
React, React Native, JavaScript, TypeScript, REST APIs, Backend Services, Real-Time Data
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