Frontend Engineer - React/Next.js, Performance & Accessibility

Horizon Labs; United States; On-site; USD 100,000 - 150,000; Full time

Job summary

Horizon Labs seeks an experienced frontend engineer to build accessible, high-performance UI components using React/Next.js and TypeScript. You’ll translate Figma specs into production-ready code, wire APIs, and enforce design system tokens across the app.

You will own state management, API integration, and optimize for Core Web Vitals while maintaining strong tests (Jest, Playwright/Cypress) and CI/CD discipline.

Qualifications

• 3+ years building production web apps at a startup or agency.
• Strong TypeScript, React, and Next.js (SSR/ISR/Edge basics).
• Expert HTML/CSS (Flexbox/Grid), modern CSS tooling (Tailwind or CSS Modules).
• Testing proficiency with Jest and Playwright/Cypress; comfortable in Git-based CI/CD.
• Web performance and accessibility skills; Core Web Vitals literacy.
• API integration experience and practical security awareness (XSS, CSRF).
• Clear written communication; crisp PRs and docs.
• Time-zone overlap: minimum 4 hours with Pacific Time or Türkiye time, depending on team.
• Based in the United States or Türkiye.

Responsibilities

• Implement responsive UI with React/Next.js and TypeScript using reusable, documented components.
• Translate Figma to code: layouts, states, interactions, microcopy, and edge cases.
• Manage state and data fetching (React Query/Zustand/Redux) with optimistic updates and caching.
• Integrate APIs (REST/GraphQL), handle auth, errors, and retries; create mocks for local dev.
• Optimize performance: code-splitting, tree-shaking, image optimization, lazy loading, and memoization.
• Enforce accessibility: semantic HTML, keyboard flows, focus management, ARIA where required.
• Write tests at the right levels; keep CI green and PRs small and reviewable.
• Guard the design system: tokens, theming, and component governance with design partners.
• Instrument the UI with logs/metrics/traces; debug using telemetry.
• Document decisions, patterns, and runbooks where the team can find them.

Skills

TypeScript

React

Next.js

HTML/CSS

Tailwind/CSS Modules

Testing (Jest)

Playwright

Cypress

Git CI/CD

Web Performance

Accessibility

API Integration

Security (XSS/CSRF)

Communication

Time-zone Overlap

Tools

Jest

Playwright

Cypress

Git

Job description

Horizon Labs seeks an experienced frontend engineer to build accessible, high-performance UI components using React/Next.js and TypeScript. You’ll translate Figma specs into production-ready code, wire APIs, and enforce design system tokens across the app.

You will own state management, API integration, and optimize for Core Web Vitals while maintaining strong tests (Jest, Playwright/Cypress) and CI/CD discipline.