Senior Full Stack Engineer – Java & React Job Santa Clara area,California USA,Software Development

Senior Full Stack Engineer – Java & React

Work Location:

Santa Clara, California – Onsite/Hybrid Assignment Duration: 12+ Months

We are looking for a Senior Full Stack Engineer who has relevant experience of 8 years in end-to-end across a modern React.js frontend and a Spring Boot microservices backend. You'll design and build resilient APIs, craft accessible and performant user interfaces, and collaborate with cross-functional teams to ship customer-centric experiences at speed and scale.

Key Responsibilities

End-to-End Delivery

Own features across frontend (React + Type Script) and backend (Java + Spring Boot)—from design and implementation to testing, deployment, and observability.
Translate business requirements into clean architecture, reusable components, and well-documented APIs.
Champion quality through code reviews, pair programming, and continuous improvement.

Frontend (React)

Build responsive, accessible SPA features with React 18+ and Type Script/JavaScript, using modern patterns (hooks, context, custom hooks).
State management with Redux Toolkit or React Query;
React Router for navigation.
Forms & validation (React Hook Form, Yup/Zod), charts, and component libraries (MUI/Ant/Chakra).
Styling with CSS Modules/SCSS/Tailwind; enforce standards via ESLINT/Prettier.
Testing with Jest + React Testing Library; E2E with Cypress/Playwright.
Performance tuning (code-splitting, lazy loading, memoization, Core Web Vitals).
Accessibility (WCAG 2.1 AA), internationalization (i18n) where applicable.
(Optional) SSR/SSG using Next.js for SEO-sensitive surfaces.

Backend (Java/Spring)

Design and build RESTful microservices with Spring Boot, Spring Web, Spring Data JPA/Hibernate.
Secure services with Spring Security, OAuth2/OIDC, JWT; manage CORS/CSRF correctly for web clients.
Define API contracts with OpenAPI/Swagger; ensure backward compatibility and versioning.
Event-driven patterns (Kafka/RabbitMQ) and caching (Redis) as needed.
Testing: JUnit 5, Mockito, Test containers for integration tests.
MySQL, No

SQL (MongoDB/DynamoDB). Performance profiling, SQL query optimization, resilience (timeouts, retries, circuit breakers).

Dev Ops & Platform

CI/CD (Git Hub Actions/Azure Dev Ops/Jenkins) for both frontend and backend pipelines (build, test, scan, deploy).
Containerization with Docker, orchestration with Kubernetes (Helm as plus).
Cloud deployment on AWS/Azure/GCP;
IaC with Terraform is a plus.
Observability: structured logging, distributed tracing (Open Telemetry), metrics & dashboards (Prometheus/Grafana), alerts (ELK/EFK).

Collaboration

Work in Agile/Scrum; break down epics into deliverable increments, maintain technical documentation (API specs, ADRs).

Qualifications — Must Have

10+ years total experience with at least 5+ years in Java (11/17+) and Spring Boot.
4+ years building production React applications; strong Type Script/JavaScript proficiency.
Solid knowledge of HTML5/CSS3, responsive design, and web accessibility fundamentals.
REST API design; JSON; understanding of CORS, CSRF, and browser security.
Proficient with Git (branching strategies), code reviews, and PR workflows.
Testing mindset: unit, integration, and E2E for both frontend and backend.
Experience with Docker and a mainstream CI/CD tool.
Strong problem-solving and communication skills.

Nice to Have

Next.js, Redux Toolkit, React Query, Storybook (design systems).
Grahl (Apollo/federation) or TRPC.
Messaging (Kafka), caching (Redis), and Kubernetes production experience.
Open API first development; API gateways.
Security tooling (SAST/DAST, OWASP Top 10) and secrets management.
Performance profiling (Lighthouse, Chrome Dev Tools, JFR, JMC) and Core Web Vitals ownership.
Feature flagging (Launch Darkly/Unleash), analytics (GA4/Segment).
Domain exposure: [Your Domain—Fin Tech/Telecom/Healthcare/etc.]