Senior Front-End Software Engineer

Role: Senior Front-End Software Engineer

Location – Los Angeles, CA | NYC, NY

Work Mode - Remote

12+ years required

Skills

Mandatory Skills : React 18 and TypeScript, HTML/HTML5, React, Redux and Redux Toolkit (RTK)

We’re looking for a Senior Front-End Software Engineer to help build and optimize a streaming application used across various devices. This role is ideal for someone who cares deeply about performance and knows how to keep complex applications fast and stable on resource-constrained devices.

What You’ll Do:

• Build and maintain front-end features using React 18 and TypeScript
• Develop predictable and maintainable state management using Redux and Redux Toolkit (RTK)
• Identify, measure, and resolve performance bottlenecks related to rendering, memory usage, and application startup
• Debug and mitigate JavaScript memory leaks in long-running applications

Required Qualifications:

• Strong experience with React and TypeScript
• Experience managing application state with Redux and RTK
• Familiarity with client-side routing patterns using React Router
• Solid understanding of front-end fundamentals (HTML, CSS, modern JavaScript)
• Experience with performance optimization - debugging, measurement, and implementation (e.g., profiling, monitoring, or performance tooling)
• Understanding of browser internals, rendering behaviour, or performance bottlenecks in large SPAs
• Ability to work collaboratively in a cross-functional team

For tech stack, this is what they currently use so understanding of these would be good:

• React 18.2.0 & TypeScript 5.9.2
• State Mgmt.: Redux, RTK
• Routing: React Router
• Testing: Vitest, Playwright (familiarity is fine)
• Preferred: Someone who has experience in app performance, measuring it, looking into things like debugging JS memory leaks.