Front-End Software Engineer

Cloudious LLC; United States; On-site; USD 140,000 - 180,000; Full time

Job summary

Cloudious LLC in the United States is seeking a Senior Front-End Software Engineer to help build and optimize a streaming application across devices. You will emphasize performance and stability on resource-constrained platforms.

Join a cross-functional team to implement features using React 18, TypeScript, Redux/RTK, and modern tooling. You will profile and debug rendering, memory usage, and startup times to keep the app fast and reliable.

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).

Responsibilities

• Build and maintain front-end features for a streaming application.
• Identify, measure, and resolve performance bottlenecks related to rendering and startup.
• Debug and mitigate JavaScript memory leaks in long-running applications.
• Collaborate with a cross-functional team to deliver reliable software.

Skills

React 18

TypeScript

Redux

RTK

React Router

Tools

Vitest

Playwright

Job description

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.

Skills

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