Backend Java Developer Jobs in California

Role description

Java Backend Engineer

The Role

UST is looking for a strong Java backend engineer to help build a NextGen, high-scale enterprise platform with a multi-vendor, multi-geo team. This is an independent contributor role from day one and is strictly on-site at the client office. Remote candidates will not be considered. One flexible remote day per week may be offered after 8 weeks.

What You’ll Do

• Build backend services for a high-scale enterprise platform as an independent contributor from day one.
• Design and develop microservices and REST APIs using Java and Spring Boot.
• Build event-driven processing with Kafka and deploy and run services on Kubernetes.
• Write optimized SQL queries and work with Cosmos DB or other NoSQL data stores.
• Apply CI/CD practices, including automated testing, build pipelines, and deployment strategies.
• Troubleshoot production code and explain the design and logic behind your past project work.

This position description identifies the responsibilities and tasks typically associated with the performance of the position. Other relevant essential functions may be required.

What You Need

Required

• 5–6 years of hands-on enterprise Java development (recent), with Java 18 or above mandatory.
• 3–4 years of hands-on Kafka experience and 2–3 years of solid Kubernetes experience.
• Hands-on Spring Boot development, including dependency injection, ORM, and REST API development.
• Strong object-oriented programming skills, design patterns, and understanding of microservices architecture.
• Proficiency in writing SQL queries optimized to industry standards, plus Cosmos DB or other NoSQL experience.
• Familiarity with CI/CD practices, including automated testing, build pipelines, and deployment strategies.
• Bachelor’s degree in computer science or a related field.
• Strong problem-solving abilities and written and verbal communication skills.

Preferred

• Azure or GCP experience, including Azure App Service, Azure Functions, and Azure SQL or Cosmos DB.

Skills

Java, Apache Kafka, NoSQL, Spring Boot, Design Patterns, Microservices, Object-Oriented Programming, REST, Kubernetes, SQL, Azure Cosmos DB

Location & Compensation

Compensation can differ depending on factors including but not limited to the specific office location, role, skill set, education, and level of experience. UST provides a reasonable range of compensation for roles that may be hired in various U.S. markets as set forth below.

Role Location: Sunnyvale, California

Compensation Range: $75,000 - $113,000

Who We Are

Since 1999, UST has worked side by side with the world’s best companies to make a powerful impact through transformation. Headquartered in the United States, UST is powered by technology, driven by AI, inspired by people, and led by our purpose, we partner with our clients from design to operation. Our AI-driven digital solutions, proprietary platforms, engineering, R&D, products, and innovation ecosystem turn core challenges into impactful, disruptive business outcomes. With deep industry knowledge and a future-ready mindset, we infuse expertise, innovation, and agility into our clients’ organizations—delivering measurable value and positive lasting change for them, their customers, and communities around the world. Together, with 30,000+ employees in 30+ countries, we build for boundless impact—touching billions of lives in the process. Visit us at .

Benefits

Full-time, regular employees accrue a minimum of 10 days of paid vacation per year, receive 6 days of paid sick leave each year (pro-rated for new hires throughout the year), 10 paid holidays, and are eligible for paid bereavement leave and jury duty. They are eligible to participate in the Company’s 401(k) Retirement Plan with employer matching. They and their dependents residing in the US are eligible for medical, dental, and vision insurance, as well as the following Company-paid Employee Only benefits: basic life insurance, accidental death and disability insurance, and short- and long-term disability benefits. Regular employees may purchase additional voluntary short-term disability benefits, and participate in a Health Savings Account (HSA) as well as a Flexible Spending Account (FSA) for healthcare, dependent child care, and/or commuting expenses as allowable under IRS guidelines. Benefits offerings vary in Puerto Rico.

Part-time employees receive 6 days of paid sick leave each year (pro-rated for new hires throughout the year) and are eligible to participate in the Company’s 401(k) Retirement Plan with employer matching.

Full-time temporary employees receive 6 days of paid sick leave each year (pro-rated for new hires throughout the year) and are eligible to participate in the Company’s 401(k) program with employer matching. They and their dependents residing in the US are eligible for medical, dental, and vision insurance.

Part-time temporary employees receive 6 days of paid sick leave each year (pro-rated for new hires throughout the year).

All US employees who work in a state or locality with more generous paid sick leave benefits than specified here will receive the benefit of those sick leave laws.

As part of our recruitment process, UST may use AI or automated tools to support activities such as application screening, scheduling, or interview assistance. All hiring decisions are made by our recruitment team. Where applicable law requires it, further notice will be provided separately.

Equal Employment Opportunity Statement

UST is an Equal Opportunity Employer.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other applicable characteristics protected by law. We will consider qualified applicants with arrest or conviction records in accordance with state and local laws and “fair chance” ordinances.

UST reserves the right to periodically redefine your roles and responsibilities based on the requirements of the organization and/or your performance.

#UST

Skills

Java, Apache Kafka, NoSQL, Spring Boot, Design Patterns, Microservices, Object-Oriented Programming, REST, Kubernetes, SQL, Azure Cosmos DB

Benefits
Compensation range: $75,000.00 to $113,000.00 per year
About UST
UST is a global digital transformation solutions provider. For more than 20 years, UST has worked side by side with the world’s best companies to make a real impact through transformation. Powered by technology, inspired by people and led by purpose, UST partners with their clients from design to operation. With deep domain expertise and a future-proof philosophy, UST embeds innovation and agility into their clients’ organizations. With over 30,000 employees in 30 countries, UST builds for boundless impact—touching billions of lives in the process.