Front-End Architect (React/Web)

Long Finch Technologies; Jersey City (NJ); On-site; USD 140,000 - 190,000; Full time

Job summary

Long Finch Technologies is seeking an accomplished Senior Front-end Engineer to lead the development of rich, user-facing web apps using React + TypeScript. You will own the front-end architecture, collaborate with UX/Product, and define coding standards.

The role emphasizes performance, accessibility, secure client-side patterns, and close cooperation with backend teams on API contracts. Experience with modern tooling and AI-assisted coding is required.

Qualifications

• 10+ years professional software engineering with front-end depth and leadership.
• Expert-level React proficiency with hooks, composition, and context.
• Strong TypeScript skills and modern JavaScript fundamentals.
• Experience with Vite/Webpack, Babel/SWC, npm/pnpm/yarn and pipelines.
• Strong CSS skills including responsive design and theming at scale.
• Advanced testing with Jest/Vitest, RTL, Playwright/Cypress; test ownership.
• Accessibility WCAG/ARIA, keyboard navigation, a11y testing.
• Performance engineering: profiling, bundle splitting, CWA optimization.
• GraphQL/REST API integration; client state management & caching.
• Security: XSS/CSRF prevention, secure auth patterns (OIDC aware).
• Observability: client logging, metrics, error reporting, debugging prod issues.
• Must: proficiency with AI-assisted tools (Claude Code, GitHub Copilot).

Responsibilities

• Lead development of complex React + TypeScript front-ends, owning architecture.
• Collaborate with UX/Product to translate designs; balance feasibility and performance.
• Define and evolve front-end standards: components, state, routing, testing.
• Build on EXDS UI foundations: design system, theming, cross-browser compatibility.
• Drive Core Web Vitals, bundle optimization, rendering strategies, caching.
• Implement rich UI features: data visualization, real-time updates, offline patterns.
• Ensure secure client-side patterns: token handling, storage, vulnerability protection.
• Partner with backend on API contracts; promote front-end friendly patterns.

Skills

10+ years experience in FE engineering

React expert

TypeScript proficiency

Front-end tooling mastery

CSS architecture & theming

Testing & QA ownership

Accessibility proficiency

Performance optimization

Security awareness

Observability & debugging

AI-assisted coding tools

Tools

Vite/Webpack

Babel/SWC

npm/pnpm/yarn

monorepos

design system tooling

Storybook/tokens

D3/Canvas/WebGL

Job description

Required Skills

• 10+ years professional software engineering experience with significant depth in front-end web development; experience leading projects and mentoring engineers.
• Expert-level React proficiency (hooks, component composition, context, rendering behavior, concurrency-related patterns where applicable).
• Strong TypeScript skills (types-as-design, generics, strictness strategies) and modern JavaScript fundamentals.
• Deep experience with modern front-end tooling: Vite/Webpack , Babel/SWC, npm/pnpm/yarn, monorepos (optional), and build/release pipelines.
• Strong CSS skills: responsive design, CSS architecture (CSS Modules, CSS-in-JS, or utility frameworks), theming, and consistent styling at scale.
• Advanced testing practices: Jest/Vitest , React Testing Library, Playwright/Cypress for E2E; test strategy ownership.
• Accessibility expertise: WCAG/ARIA , keyboard navigation, screen-reader considerations, and automated + manual a11y testing.
• Performance engineering: profiling, bundle splitting, SSR/CSR trade-offs, caching strategies, and Core Web Vitals optimization.
• API integration expertise with GraphQL and REST (schema-driven development, error handling, pagination, caching, and client state strategies).
• Security awareness for web apps: XSS/CSRF prevention, dependency hygiene, secure auth/session patterns (OIDC awareness a plus).
• Observability for the front end: client-side logging/metrics, error reporting, and debugging production issues.
• MUST: Proficiency using AI-assisted engineering tools (e.g., Claude Code, GitHub Copilot ) to accelerate implementation, refactoring, test creation, and debugging—while validating correctness and adhering to secure handling practices.

Preferred qualifications

• Experience with SSR/meta frameworks: Next.js / Remix and SEO considerations.
• Experience leveraging a design system (Storybook, tokens).
• Experience with micro-frontend patterns and module federation (where relevant).
• Experience with visualization and rich UI: D3, Canvas/WebGL, advanced tables/grids, animation libraries.
• Familiarity with authentication integrations (OIDC/OAuth2) and enterprise SSO constraints.
• Proven track record modernizing legacy front ends and improving developer experience (DX).

Job responsibilities

• Lead development of complex, user-facing web applications using React + TypeScript , owning the front-end architecture and delivery approach.
• Partner with UX/Product to translate designs into polished experiences; influence requirements with feasibility, performance, and accessibility considerations.
• Establish and evolve front-end standards: component architecture, state management, routing, code conventions, and testing practices.
• Build using JPMC’s EXDS UI foundations: design system / component library , theming, responsive layouts, and cross-browser compatibility.
• Drive performance and quality: Core Web Vitals, bundle optimization, rendering strategies, caching, and runtime observability.
• Implement advanced UI capabilities such as rich data visualization, real-time updates, offline-friendly patterns, and robust form/workflow experiences.
• Ensure secure client-side patterns: safe auth flows, token handling guidance, secure storage, and protection against common web vulnerabilities.
• Collaborate with backend teams on API contracts (GraphQL/REST ) and advocate for front-end friendly patterns (pagination, filtering, error models).