Frontend Developer

Title Sr Front-End Engineer Location Jersey City, NJ — 100% onsite Terms Long Term Contract Role Summary Lead the design and development of modern, high-performance web experiences using React and the broader front-end ecosystem. This role is front-end focused, partnering closely with Product, UX, and backend/platform teams to deliver cutting‑edge UI capabilities and set engineering standards. 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. 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). Required Qualifications, Capabilities, and 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). 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). #J-18808-Ljbffr