Java Full Stack Developer | Contract W2

Role: Java Full Stack Developer (React & Spring Boot Microservices)Locations: San Leandro, CA - OnsiteDuration: Long termEmployment Type: Contract W2Experience: 12+ YearsInterview Type: In person Interview required with clientJob OverviewWe are seeking a highly skilled Full Stack Java Developer with a strong frontend focus on React and deep expertise in Spring Boot–based microservices. The ideal candidate will design, develop, and maintain scalable, high performance web applications and RESTful services for enterprise-grade platforms, particularly within regulated or high availability environments.Key ResponsibilitiesFrontend (React – Strong Focus)Design and develop modern, responsive Single Page Applications (SPAs) using React (Hooks, Context API, Redux)Build reusable, modular UI components using JavaScript/TypeScript, HTML5, CSS3Integrate frontend applications with backend APIs using REST/JSONOptimize UI performance using lazy loading, code splitting, and efficient state managementCollaborate with UX/UI designers to translate wireframes into high-quality user experiencesBackend (Java & Spring Boot Microservices)Design and develop Spring Boot microservices following RESTful and microservices architecture principlesImplement business logic using Java (8/11/17+), Spring MVC, Spring Data JPA/HibernateBuild secure APIs with OAuth2, JWT, and role-based access controlsEnsure high availability, scalability, and fault tolerance using resilient design patternsIntegrate with relational and NoSQL databases (PostgreSQL, Oracle, MySQL, MongoDB)DevOps & Engineering PracticesWrite unit and integration tests using JUnit, Mockito, Jest, EnzymeParticipate in CI/CD pipelines using Maven, Jenkins, GitHub/GitLab, Azure DevOpsContainerize and deploy services using Docker and Kubernetes (preferred)Work in Agile/Scrum teams, contributing to design reviews, code reviews, and sprint ceremoniesRequired SkillsStrong proficiency in React (v16+ / v18 preferred)Solid backend development experience with Java and Spring Boot microservicesREST API design and integration expertiseExperience with SQL and ORM frameworks (JPA/Hibernate)Hands-on experience with Git, build tools, and CI/CD pipelinesStrong problem-solving and communication skillsNice to HaveExperience with Kafka or event-driven architectureCloud experience on AWS, Azure, or GCPExposure to Micro-frontend architectureBanking, Financial Services, or other regulated domain experienceAbout Next Gen Software Solutions LLC:Next Gen Software Solutions is a trusted provider of IT Staffing and consulting services dedicated to empowering businesses with cutting-edge technology solutions and exceptional talent. We specialize in delivering tailored IT consulting services, innovative software solutions, and connecting businesses with highly skilled IT professionals. Founded and led by a dedicated U.S. Army solider, Next Gen Software Solutions is deeply rooted in the core values of integrity, discipline, commitment, and experience-principles that guide every aspect of our operations.Equal Employment Opportunity Statement:Next Gen Software Solutions LLC is an Equal Opportunity Employer. We are committed to fostering an inclusive and diverse workplace where all employees and applicants are treated respect and dignity. We do not discriminate based on race, colour, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, age, genetic information, veteran status, or any other legally protected characteristic under applicable federal, state, or local laws.