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InfiCare

Sr Front-End Engineer

Pay: Not specified

Posted: 4 days ago

Location: Jersey City, NJ (Onsite)

Last Updated: 5 hours ago

Hours: Full-Time

Expires: 10/14/2026

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What they do

A Front End Developer implements visual elements that users see and interact with in a web application. Usually supported by back-end developers.

$87,843 / year median in New Jersey

-13% projected decline

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Job Description

Job Title:

Sr Front-End Engineer Location:

Jersey City, NJ Job Type:

Contract Experience:

12+ years

Work Model:

Onsite - 5 days/week Job Overview Key Responsibilities Develop microservices and API contracts (GraphQL/REST) using Java and Spring with front-end friendly design patterns. Partner with UX/Product to translate designs into polished, accessible, performant experiences.

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 observability. Implement advanced UI capabilities including rich data visualization, real-time updates, and robust form/workflow experiences. Ensure secure client-side patterns including safe auth flows, token handling, and protection against common web vulnerabilities.

Required Skills Expert-level React:

hooks, component composition, context, rendering behavior, concurrency patterns

Strong TypeScript:

types-as-design, generics, strictness strategies Modern JavaScript fundamentals Java and Spring for microservices / API contracts Front-end tooling: Vite/Webpack, Babel/SWC, npm/pnpm/yarn, build/release pipelines CSS architecture: responsive design, CSS Modules, CSS-in-JS, utility frameworks

Testing:

Jest/Vitest, React Testing Library, Playwright/Cypress, test strategy ownership

Accessibility:

WCAG/ARIA, keyboard navigation, screen-reader considerations, automated a11y testing Performance engineering: profiling, bundle splitting, SSR/CSR trade-offs, Core Web Vitals API integration: GraphQL and REST, schema-driven development, error handling, caching

Security:

XSS/CSRF

prevention, dependency hygiene, secure auth/session patterns Proficiency with AI-assisted engineering tools (e.g., GitHub Copilot, Claude Code) Preferred Skills SSR/meta frameworks: Next.js / Remix Design system experience: Storybook, design tokens Micro-frontend patterns and module federation

Rich UI/visualization:

D3, Canvas/WebGL, advanced tables/grids, animation libraries Authentication integrations: OIDC/OAuth2, enterprise SSO Track record modernizing legacy front ends and improving developer experience Location & Work Model Jersey City, NJ - X days onsite per week. Engagement Details Contract engagement. 12+ years of professional software engineering experience required.