Senior Frontend Engineer — React & UX Focus

Weekday (YC W21); San Francisco (CA); On-site; USD 160,000 - 260,000; Full time

Job summary

Weekday (YC W21) in San Francisco seeks an experienced Frontend Developer to design, develop, and optimize modern web applications delivering exceptional user experiences. You will collaborate with product managers, designers, and backend engineers to build responsive, scalable interfaces.

The role emphasizes working with JavaScript/TypeScript, modern frameworks, and performance/ accessibility best practices in a fast-paced, collaborative environment.

Qualifications

• Bachelor's degree in Computer Science, Engineering, or related field (or equivalent experience)
• 5+ years of professional frontend development experience
• Strong proficiency in JavaScript and TypeScript
• Experience building modern web applications with React/Next.js/Angular/Vue.js or similar
• Strong HTML5/CSS3, responsive design, and UI development practices
• Experience consuming RESTful APIs and collaborating with backend services
• Familiarity with state management libraries like Redux/Zustand/MobX/Context API
• Experience with Git workflows, CI/CD pipelines, and automated testing
• Strong frontend performance optimization, accessibility, and cross‑browser compatibility
• Excellent problem‑solving, debugging, and collaborative skills
• Ability to work well in cross-functional teams

Responsibilities

• Design, develop, and optimize modern web applications for exceptional user experiences
• Collaborate with product managers, designers, and backend engineers
• Build responsive, scalable, high‑performing user interfaces
• Contribute to code quality through testing and reviews
• Participate in design and architecture discussions to improve frontend systems

Skills

5+ years experience

JavaScript

TypeScript

HTML/CSS

REST APIs

State management

Git/CI/CD

Performance/Accessibility

Collaboration

Problem solving

Education

Bachelor's degree in CS/Engineering

Tools

React

Next.js/Angular/Vue.js

Vite/Webpack/Rollup

SSR/SSG

UI libraries (Material UI/Chakra UI)

Job description

Weekday (YC W21) in San Francisco seeks an experienced Frontend Developer to design, develop, and optimize modern web applications delivering exceptional user experiences. You will collaborate with product managers, designers, and backend engineers to build responsive, scalable interfaces.

The role emphasizes working with JavaScript/TypeScript, modern frameworks, and performance/ accessibility best practices in a fast-paced, collaborative environment.