Senior Java Developer

Apex Systems; Pleasanton (CA); Hybrid; USD 96,000 - 117,000; Full time

Job summary

Everforth Apex Systems is seeking a Senior Java Developer for an onsite role in Pleasanton, CA. You will design, build, and maintain high-performance backend systems using Java and Spring Boot, emphasizing scalable microservices and robust data access layers.

The ideal candidate brings 10+ years of Java experience, strong Spring Framework skills, and a proven track record in architecture, code quality, and mentoring junior engineers in a fast-paced environment.

Qualifications

• Bachelor's or Master's in Computer Science, Engineering, or related field, or equivalent experience.
• 10+ years of professional Java development experience.
• Retail industry experience is a plus.

Responsibilities

• Design, develop, and maintain backend applications using Java and Spring Boot.
• Architect microservices-based solutions and contribute to design discussions.
• Write clean, well-documented code and optimize database schemas and queries.
• Collaborate with product, QA, and DevOps teams; conduct code reviews.
• Mentor junior developers and contribute to technical roadmaps.
• Ensure security, scalability, and reliability of applications.

Skills

Java

Spring Boot

Microservices

REST API

Hibernate/JPA

Maven/Gradle

Git

JUnit/TDD

Docker/Kubernetes

AWS/Azure/GCP

Software design patterns

SOLID principles

Education

Bachelor's or Master's in CS/Engineering

Tools

MySQL/PostgreSQL/Oracle

Jenkins

Job description

# Senior Java DeveloperApply**Job#: 3050300****Job Description:**Senior Java Developer**Location:** Pleasanton, California (Onsite)Role OverviewWe are seeking a Senior Java Developer with deep expertise in Java, Spring Boot, and database technologies. In this role, you will be instrumental in designing, developing, and maintaining scalable, high-performance applications. You will also mentor junior developers and help drive technical best practices across the team.Key Responsibilities* Design, develop, and maintain robust, scalable, and high-performance backend applications using Java and Spring Boot.* Architect microservices-based solutions and contribute to system design discussions.* Write clean, efficient, and well-documented code following industry best practices.* Design and optimize database schemas, queries, and stored procedures for performance and scalability.* Collaborate with cross-functional teams including product managers, QA, and DevOps.* Conduct code reviews and provide constructive feedback to team members.* Troubleshoot, debug, and resolve complex production issues.* Mentor junior and mid-level developers, fostering technical growth within the team.* Participate in architectural decisions and contribute to technical roadmaps.* Ensure application security, scalability, and reliability standards are met.* Stay current with emerging technologies and recommend improvements to existing systems.* Contribute to CI/CD pipeline improvements and DevOps practices.Required Qualifications**Education:** A Bachelor's or Master's degree in Computer Science, Engineering, or a related field, or equivalent practical experience is required.**Experience:** 10+ years of professional experience in Java development is required. Retail industry experience is also sought.**Technical Skills:*** Strong hands-on experience with Spring Boot and the Spring Framework (Spring MVC, Spring Data, Spring Security).* Proven experience designing and building microservices architecture.* Strong expertise in relational databases (e.g., MySQL, PostgreSQL, Oracle), including schema design, query optimization, and indexing.* Solid understanding of RESTful API design and development.* Experience with ORM frameworks such as Hibernate or JPA.* Proficiency in build tools like Maven or Gradle and version control with Git.* Experience with unit testing frameworks such as JUnit or Mockito and TDD practices.* Familiarity with containerization and orchestration (Docker, Kubernetes).* Understanding of cloud platforms (AWS, Azure, or GCP).* Strong knowledge of design patterns, SOLID principles, and clean code practices.* Experience with CI/CD tools like Jenkins or GitLab CI.Preferred Qualifications* Experience with NoSQL databases (e.g., MongoDB, Redis, Cassandra).* Experience with message queuing systems such as Kafka or RabbitMQ.* Experience with event-driven architecture.* Exposure to Agile/Scrum methodologies.* Prior experience in a technical leadership or mentorship role.* Knowledge of performance tuning and application monitoring tools (e.g., New Relic, Datadog, Splunk).* Experience working in a fast-paced, cross-functional product environment. *Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico.**Everforth Apex uses a virtual recruiter as part of the application process. Click here for more details. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Everforth Apex and its affiliates, and contracted partners. Frequency varies for text messages. Message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You can reply STOP to cancel and HELP for help. You can access our privacy policy at https://www.apexsystems.com/privacy-policy**Everforth Apex Benefits Overview: Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Everforth Apex team member can provide.**Everforth Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.**If you require an accommodation under the Americans with Disabilities Act to participate in an interview with a virtual recruiter or to use our website for a search or application, please contact our Benefits Department at [e-mail] or 804-523-8228. Please note that this contact information is strictly to be used for medical ADA accommodations and that no other inquiries will be answered.**UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Everforth Apex Systems.***Employee Type:** Contract**Location:** Pleasanton, CA, US**Job Type:****Date Posted:** September 18, 2026**Pay Range:** $70 - $85 per hour