Jersey City, NJ Sr Front-End Engineer 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 (React) 60% and backend (Java Spring) 40% focused skills to deliver cutting-edge UI & Microservices capabilities and set engineering standards . Job responsibilities Lead development of complex, user-facing web applications using React , owning the front-end architecture and delivery approach. Develop microservices / API contracts ( GraphQL/REST ) using Java and Spring technologies and front-end friendly design patterns (pagination, filtering, error models).
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. Required qualifications, capabilities, and skills 12+ 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. Strong Java and Java Spring skills to develop microservices / API contracts ( GraphQL/REST ) using Java and Spring technologies and front-end friendly design patterns (pagination, filtering, error models). Deep experience with modern front-end tooling: Vite/Webpack , Babel/SWC, npm/pnpm/yarn, monorepos (optional), and build/release pipelines.
Advanced testing practices:
Jest/Vitest , React Testing Library, Playwright/Cypress for E2E; test strategy ownership.
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.
