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TitanTitanNew York, NY

Senior Full Stack Engineer – Web & Mobile

Builds and maintains end-to-end customer-facing features spanning React web and React Native mobile apps, integrating backend APIs and optimizing performance. Requires 3+ years full stack experience with strong JavaScript/TypeScript expertise.

150k – 300k/yr
On-site3+ YOEFullstack Engineering

About the role

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

  • 3+ 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

ReactReact NativeJavaScriptTypeScriptREST APIsFintech

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