Full stack developer

Client: Cognizant / Gilead
Location: Remote
Employment Type: W2

Job Summary

We are seeking a skilled Full Stack / Frontend Developer with strong expertise in Next.js, React, and TypeScript to deliver end-to-end product features from UI development through API integration. The ideal candidate should have experience building modern, scalable user interfaces, integrating AI capabilities, managing application state, and implementing robust testing practices.

Key Responsibilities

• Build modern web applications using Next.js 15, React 19, App Router, React Server Components (RSC), and Server Actions.
• Implement AI-powered experiences using the Vercel AI SDK, including streaming chat and completion experiences.
• Develop scalable and responsive UI systems using Tailwind CSS 4.
• Implement client/server state management using Zustand and TanStack Query.
• Integrate authentication and session management using JWT and secure API consumption.
• Build document-related experiences using PDFTron WebViewer and OnlyOffice React Editor.
• Implement analytics and feature flagging using PostHog.
• Develop and maintain automated tests using Playwright E2E and Vitest.
• Collaborate with engineering and product teams to deliver reliable and scalable product features.

Required Skills

• Strong proficiency in TypeScript, React, and Next.js.
• Hands-on experience with Next.js App Router and React Server Components.
• Strong knowledge of Tailwind CSS and modern frontend development.
• Experience with API integration and streaming UI patterns, preferably SSE.
• Experience with Playwright and unit/component testing.
• Familiarity with Zustand and TanStack Query.

Nice-to-Have Skills

• Experience with Vercel AI SDK and AI-powered application development.
• Working knowledge of Python/FastAPI services.
• Basic understanding of Docker and Kubernetes.
• Experience with JWT authentication and secure API integrations.
• Experience with PostHog or similar analytics/feature-flag platforms.

Testing & Quality

• Develop and maintain Playwright E2E tests.
• Write unit and component tests using Vitest.
• Follow CI-friendly testing and quality practices.
• Participate in debugging and performance optimization.

Technical Environment

Frontend: React 19, Next.js 15, TypeScript, Tailwind CSS 4
State Management: Zustand, TanStack Query
AI: Vercel AI SDK
Testing: Playwright, Vitest
Authentication: JWT
Analytics: PostHog
Backend/Nice to Have: Python, FastAPI
Infrastructure/Nice to Have: Docker, Kubernetes