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Junior Java Microservices Developer Jobs in California

Lead SRE Engineer

San Leandro, CA · On-site

$63 - $83.75/hr

Min 15+ years of experience in Site Reliability Engineering ... With development background in Java microservices & Spring Web applications development * MongoDB ...

We are looking for a skilled and motivated Java Developer with strong experience in AWS , Microservices architecture , and Kotlin . In this role, you will be responsible for designing, developing ...

Java Developer

Irvine, CA · On-site

$54.75 - $70.75/hr

Software engineer with relevant experience in developing, packaging, configuring deploying, operating and maintaining microservices written in Java 21, in a cloud-native environment. Good ...

Staff Java Engineer

San Francisco, CA · On-site

$61 - $83.75/hr

Develop and maintain Java microservices, libraries, automated tests, and build scripts. * Expertise ... Perform code reviews and evaluate pull requests, helping other engineers debug and resolve problems.

Staff Java Engineer

San Francisco, CA

$61 - $83.75/hr

Develop and maintain Java microservices, libraries, automated tests, and build scripts. * Expertise ... Perform code reviews and evaluate pull requests, helping other engineers debug and resolve problems.

Staff Java Engineer

San Francisco, CA · On-site

$61 - $83.75/hr

Develop and maintain Java microservices, libraries, automated tests, and build scripts. * Expertise ... Perform code reviews and evaluate pull requests, helping other engineers debug and resolve problems.

Backend Java Engineer

Sunnyvale, CA · On-site

$60 - $78/hr

Role: - Backend Java Developer Location: Sunnyvale CA (2 days WFO) Type: - 12 months Contract with ... Strong experience with Java, Spring Boot, and building scalable microservices, particularly in ...

Java AI Developer

Palo Alto, CA · On-site

$53 - $57/hr

Seeking a Java AI Developer with strong programming skills and experience in cloud services to ... Understanding of microservices, event-driven architectures, and RESTful API design. * Experience ...

Java Developer

Fremont, CA · On-site

$55.75 - $72.25/hr

Java Developer Location: Onsite Duration: 6+ months Details: * Full-Stack Desktop Development ... Developing secure RESTful APIs and microservices leveraging Node.js , Python , and Express . * Data ...

Java Developer II

Malibu, CA · On-site

$115K - $150K/yr

Position Summary Avum is seeking an experienced Java Developer to support the design, development ... Develop and maintain APIs, microservices, and backend systems * Collaborate with architects ...

Java Kubernetes Admin

Sunnyvale, CA · On-site

$59.75 - $77.50/hr

... Microservices, Rest API , Apache Kafka Terraform, Ansible, Helm Secondary Skill: Docker/Container • Technical expertise in object-oriented programming (Java/J2EE) and proficiency in ...

Java, AWS API Gateway, RESTful APIs, Microservices Architecture, DevOps, CI/CD, Agile. Job Summary ... guidance to junior engineers Engage with product managers and stakeholders to understand ...

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Infographic showing various Junior Java Microservices Developer job openings in California as of July 2026, with employment types broken down into 84% Full Time, 5% Part Time, 2% Temporary, and 9% Contract. Highlights an 82% Physical, 3% Hybrid, and 15% Remote job distribution.

Hiring: Java Full Stack Developer (React & Spring Boot Microservices) at San Leandro, CA

Realtech Services

San Leandro, CA • On-site

$59.25 - $76.50/hr

Contractor

Re-posted 9 days ago


Job description


 

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

Location: San Leandro, CA

In-person Interview Must at Client's Office

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 MVCSpring 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 architectures
  • Cloud experience on AWS, Azure, or GCP
  • Exposure to Micro-frontend architecture
  • Banking, Financial Services, or other regulated domain experience