Senior React Front-End Architect & Design System Leader

Long Finch Technologies; Oradell (NJ); On-site; USD 180,000 - 240,000; Full time

Job summary

Long Finch Technologies is seeking a senior front-end engineer to lead complex, user-facing web applications using React and TypeScript. You will own the front-end architecture, collaborate with UX/Product, and drive performance, accessibility, and DX across the team.

The role emphasizes expert React skills, modern tooling, and secure, scalable frontend patterns, with a focus on delivering polished experiences at scale.

Qualifications

• Must have 15+ years of professional software engineering experience with depth in front-end web development.
• Expert-level React proficiency (hooks, composition, context, rendering behavior).
• Strong TypeScript skills; modern JavaScript fundamentals.

Responsibilities

• Lead development of complex, user-facing web applications using React + TypeScript.
• Partner with UX/Product to translate designs into polished experiences with performance and accessibility in mind.
• Establish and evolve front-end standards: component architecture, state management, routing, testing practices.
• Build using design system foundations, theming, responsive layouts, cross-browser compatibility.
• Drive performance, code quality, and runtime observability; optimize Core Web Vitals and render strategies.
• Collaborate with backend teams on API contracts (GraphQL/REST) and frontend-friendly patterns.

Skills

React

TypeScript

Front-end architecture

Testing (Jest/Vitest)

Accessibility (WCAG/ARIA)

Performance optimization

GraphQL/REST

AI-assisted tooling (Claude Code, Copi

Security basics

Observability

Tools

Vite/Webpack

Babel/SWC

npm/pnpm/yarn

monorepos

Storybook

Job description

Long Finch Technologies is seeking a senior front-end engineer to lead complex, user-facing web applications using React and TypeScript. You will own the front-end architecture, collaborate with UX/Product, and drive performance, accessibility, and DX across the team.

The role emphasizes expert React skills, modern tooling, and secure, scalable frontend patterns, with a focus on delivering polished experiences at scale.