Top Senior Java Developer Jobs in Los Angeles, CA

The Java Developer will assist in designing and developing software products, enhancing existing systems, and solving integration issues. The candidate must have strong communication and documentation skills.

We are looking for a Java Developer with extensive experience in software design and development, particularly in multi-tiered systems. The role involves developing new software products and enhancing existing ones, requiring strong problem-solving skills and effective communication.

Design, build, and maintain efficient, reusable Java backend systems; translate business requirements into applications; optimize performance and stability; review and test code for quality and security; identify and fix bottlenecks and bugs; maintain code quality and system responsiveness.

Develop and maintain Java/J2EE applications using MVC patterns and frameworks (Struts, Spring). Implement client-side features with jQuery and jQuery UI. Work with SQL Server and Oracle databases. Troubleshoot and resolve application issues. Preference for local candidates for in-person interview.

Design, develop, test, and deploy full-stack Java applications (backend Java/Spring Boot, frontend React/Angular, PostgreSQL). Lead architecture decisions, mentor developers, perform code reviews, troubleshoot issues, implement testing strategies (JUnit, Cypress, Playwright), collaborate with product/QA/DevOps in Agile, and support VA mission-critical initiatives while meeting security and clearance requirements.

Develop and maintain Java/J2EE web applications and integrations using ESB technologies (Fuse, Camel, ServiceMix). Implement JMS messaging, optimize services for large-volume data, work with Oracle databases and PL/SQL, build SOAP/REST services, and perform data analysis and performance tuning using Java frameworks and related tools.

Design and lead architecture for large-scale Java/J2EE applications. Create end-to-end solution architectures, translate business requirements into technical designs, guide build-vs-buy decisions, mentor teams, ensure integration, high availability and disaster recovery, and support DevOps and Agile delivery practices.

Define architecture roadmaps and solution blueprints, create end-to-end application architecture and models, translate business requirements into technical designs, assess build-vs-buy decisions, provide technical leadership, collaborate with infrastructure and project teams, and advise development teams throughout the software development lifecycle.

Develop and deliver Java/JEE enterprise software in a SOA environment across the full SDLC. Work with JMS, web services, XML technologies, and collaborate with systems, hardware, and integration/test engineers. On-site role requiring Top Secret clearance and up to 25% travel.

Designs and implements enterprise Java (JEE) solutions and microservices in an Agile environment. Collaborates with systems, cloud, DevSecOps, and test teams across the SDLC to prototype, build, test, and release GUI and backend services. Requires Top Secret clearance and SAP/PAR access, on-site work in San Diego or El Segundo, and periodic travel.

Design, develop, and maintain high-performance, secure Java backend services and APIs. Ensure reliability, scalability, and cost-efficiency across microservices, databases, messaging systems, and capacity planning. Troubleshoot, profile, benchmark, and optimize systems (including ML applications) and collaborate with Kazakhstan stakeholders.

Reverse-engineer TIBCO BW/MFT processes to extract business logic, then design and implement a modular Java/Spring Boot microservices replacement. Migrate protocols to Kafka/RabbitMQ/REST, translate XML transformations, ensure data persistence and consistency, and validate performance to meet existing SLAs.

Design, build, and maintain Java/J2EE multi-layer applications and APIs. Collaborate with architects and DevOps to implement CI/CD, code quality, testing, and database solutions (DB2/Oracle, PL/SQL). Support cross-team delivery, resolve technical roadblocks, and drive process improvements in an asset management/financial services context.

Analyze legacy TIBCO BusinessWorks/MFT processes to extract business logic, design and build a decoupled Java/Spring Boot microservices platform, migrate protocols to Kafka/RabbitMQ/REST, translate XML-heavy transformations to modern formats, and validate performance and SLAs to match legacy throughput.

The Senior Full Stack Java Developer will design and maintain enterprise applications using Java and modern front-end technologies while collaborating in Agile teams and mentoring junior developers.

As a Senior Software Engineer, you will maintain and develop data connectors, enhance data integrations, and improve developer experience within the ClickHouse data ecosystem.

Lead migration of legacy COBOL systems to Java-based microservices and develop scalable, secure full-stack solutions on Azure. Build RESTful APIs, optimize performance, ensure DoD cybersecurity compliance, collaborate across teams, document architectures, and participate in Agile ceremonies.

Design, develop, and deliver enterprise-grade Java software across the SDLC. Research emerging technologies, build proofs-of-concept, drive architecture and scalability, collaborate with cross-functional teams, and support testing, documentation, and product stability.

Join a small team to design and deliver high-quality, low-maintenance Java applications. Coach client teams on modern development practices, apply test-driven development, and pursue ongoing professional growth through training and mentorship.

Seeking a Senior Java Engineer with 10+ years of experience in Java/J2EE development, strong skills in Core Java, Spring, and Hibernate. Knowledge in REST or SOAP web services is essential.

The Senior Java Developer will design, develop, and implement custom software solutions in Agile teams, mentor juniors, and ensure product quality.

Architect, implement, and optimize live and on-demand streaming pipelines in Wowza. Design scalable transcoding and packaging workflows, debug performance issues, integrate native code via JNI, and serve as a streaming subject-matter expert across cross-functional projects.

Optimize and scale blockchain node performance, design and implement core system plugins, collaborate with cross-functional teams, conduct performance testing and debugging, and stay current on blockchain and distributed systems technologies to maintain reliable infrastructure.

Develop and maintain Java backend services for enterprise blockchain applications, integrate APIs with React/Vue frontends, design scalable blockchain solutions, troubleshoot complex backend issues, and collaborate with the team to apply best practices and stay current with blockchain trends.

The Senior Software Engineer will develop and maintain big data applications, focusing on distributed computing, automation, and collaboration with teams to enhance healthcare solutions.