# Senior Full Stack Engineer – Web & Mobile
**Company:** [Titan](https://hotfix.jobs/companies/titan)
**Location:** New York, NY
**Salary:** $150K-$300K
**Experience:** 3+ years
**Skills:** React, React Native, JavaScript, TypeScript, REST APIs, Fintech
**Posted:** 2026-02-06
> 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.
## Job Description
## 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.
**Apply:** https://hotfix.jobs/jobs/senior-full-stack-engineer-web-mobile-at-titan-42bbb427-1a2f-4790-b138-5342b12d103c
**Canonical:** https://hotfix.jobs/jobs/senior-full-stack-engineer-web-mobile-at-titan-42bbb427-1a2f-4790-b138-5342b12d103c