Java Full Stack Developer (React & Spring Boot ) | San Leandro, CA - Onsite | F2F Interview required

Role: Java Full Stack Developer (React & Spring Boot Microservices)

Locations: San Leandro, CA - Onsite

Duration: Long term

Employment Type: Contract W2

Experience: 12+ Years

Interview Type: In person Interview required with client

Job Overview
We 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 Responsibilities

Frontend (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, CSS3
• Integrate frontend applications with backend APIs using REST/JSON
• Optimize UI performance using lazy loading, code splitting, and efficient state management
• Collaborate with UX/UI designers to translate wireframes into high-quality user experiences

Backend (Java & Spring Boot Microservices)

• Design and develop Spring Boot microservices following RESTful and microservices architecture principles
• Implement business logic using Java (8/11/17+), Spring MVC, Spring Data JPA/Hibernate
• Build secure APIs with OAuth2, JWT, and role-based access controls
• Ensure high availability, scalability, and fault tolerance using resilient design patterns
• Integrate with relational and NoSQL databases (PostgreSQL, Oracle, MySQL, MongoDB)

DevOps & Engineering Practices

• Write unit and integration tests using JUnit, Mockito, Jest, Enzyme
• Participate in CI/CD pipelines using Maven, Jenkins, GitHub/GitLab, Azure DevOps
• Containerize and deploy services using Docker and Kubernetes (preferred)
• Work in Agile/Scrum teams, contributing to design reviews, code reviews, and sprint ceremonies

Required Skills

• Strong proficiency in React (v16+ / v18 preferred)
• Solid backend development experience with Java and Spring Boot microservices
• REST API design and integration expertise
• Experience with SQL and ORM frameworks (JPA/Hibernate)
• Hands-on experience with Git, build tools, and CI/CD pipelines
• Strong problem-solving and communication skills

Nice to Have

• Experience with Kafka or event-driven architecture
• Cloud experience on AWS, Azure, or GCP
• Exposure to Micro-frontend architecture
• Banking, Financial Services, or other regulated domain experience

About 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.