Senior Java Backend Developer (Pure Backend)

Job Title

Senior Java Backend Developer (Pure Backend)

Location

Sunnyvale, CA

Job Type

Long-Term Contract

Work Mode

Onsite

Experience

7+ Years

Job Summary

We are seeking an experienced Senior Java Backend Developer to join our team supporting Walmart International. The ideal candidate will have 7+ years of hands-on experience in pure Java backend development, microservices architecture, data structures and algorithms (DSA), and Apache Kafka.

This is a strictly backend-focused role requiring strong Java programming skills, experience developing scalable backend services, and the ability to solve complex technical problems. Candidates must be comfortable working onsite in Sunnyvale, CA. Relocation candidates are welcome.

Key Responsibilities

• Design, develop, and maintain scalable, high-performance backend applications using Core Java.
• Build and support microservices-based applications using Java and modern backend technologies.
• Implement efficient algorithms and data structures to solve complex computational problems.
• Develop and maintain event-driven applications using Apache Kafka.
• Design, develop, and optimize RESTful APIs and backend services.
• Troubleshoot complex technical issues and improve application performance, scalability, and reliability.
• Write clean, reusable, maintainable, and efficient code following industry best practices.
• Collaborate with cross-functional engineering teams to design and implement backend solutions.
• Participate in code reviews, debugging, performance optimization, and production support.
• Ensure code quality through unit testing, integration testing, and appropriate debugging practices.

Required Skills and Qualifications

• 7+ years of professional experience in Java backend development.
• Strong hands-on experience with Core Java and advanced Java programming concepts.
• Proven experience designing and developing microservices.
• Strong understanding of Data Structures and Algorithms (DSA).
• Hands-on experience with Apache Kafka, including event streaming and messaging concepts.
• Strong knowledge of object-oriented programming (OOP), multithreading, concurrency, and exception handling.
• Experience developing and integrating RESTful APIs.
• Strong problem-solving and analytical skills.
• Experience building scalable, reliable, and high-performance backend applications.
• Ability to work independently in a fast-paced engineering environment.
• Willingness to work onsite in Sunnyvale, CA.

Preferred Qualifications

• Experience working with distributed systems and event-driven architectures.
• Knowledge of database concepts, SQL, and query optimization.
• Familiarity with performance tuning, debugging, and production troubleshooting.
• Experience with backend testing frameworks and CI/CD practices.
• Experience working in large-scale enterprise environments.