Senior Frontend Engineer (React): Real-Time & Performance

Photon; Sunnyvale (CA); On-site; USD 120,000 - 180,000; Full time

Job summary

Photon is seeking a senior front-end engineer to join our team in Sunnyvale, CA. You will build and maintain web applications using React, integrate with back-end REST APIs, and implement real-time features with WebSockets. You will contribute to design systems and reusable UI components while ensuring high performance.

The role requires 5+ years of experience, strong knowledge of REST APIs, and a focus on Core Web Vitals optimization, with collaboration across QA for quality assurance.

Qualifications

• 5+ years of professional front-end development experience.
• Production React experience for building web applications.
• Experience with REST APIs, CORS, authentication, and authorization.
• Hands-on experience implementing WebSocket-based features.
• Knowledge of web performance optimization and Core Web Vitals (LCP, INP, CLS).

Responsibilities

• Integrate front-end with back-end REST APIs, handling CORS and auth flows.
• Implement real-time features using WebSockets.
• Optimize performance to meet Core Web Vitals targets.
• Contribute to design systems and reusable UI components.
• Collaborate with QA and participate in code reviews.

Skills

Front-end development

React development

Angular

API integration

WebSockets

Performance optimization

Tools

Node.js

Vite

Webpack

Job description

Photon is seeking a senior front-end engineer to join our team in Sunnyvale, CA. You will build and maintain web applications using React, integrate with back-end REST APIs, and implement real-time features with WebSockets. You will contribute to design systems and reusable UI components while ensuring high performance.

The role requires 5+ years of experience, strong knowledge of REST APIs, and a focus on Core Web Vitals optimization, with collaboration across QA for quality assurance.