Top Senior Java Developer Jobs in San Francisco Bay Area, CA

The Sr. Java Developer will design and implement core Java/J2EE systems, lead projects, and mentor teams while managing technical challenges.

Seeking a Java Developer with extensive experience in front-end and back-end technologies. Must have mobile app development skills and strong Java knowledge.

Seeking a Java/Cloud developer with 5+ years of experience. Responsibilities include designing scalable web services and cloud APIs, promoting engineering practices, and providing support for existing platforms.

The Senior Java Developer will focus on backend development, utilizing Java, Kafka, Cassandra, and Spring technologies to create complex systems and maintain high availability.

The role involves designing and developing software solutions, unit testing, and collaborating with various teams to improve customer experience using rich data sets.

The Front End Java engineer will design and develop software using Java and JavaScript, with expertise in MVC frameworks like Backbone.js, focusing on the Unified project's Browse front end pages.

The Backend Java Developer IV leads large Java/J2EE projects, requiring extensive development, teamwork, and communication skills alongside proven technical expertise.

Develop and modernize laboratory informatics software by converting Perl CGI applications to Java web services. Responsibilities include Java and Perl development, unit testing, SQL and database optimization, dynamic reporting, software design, application integration, code reviews, system interfaces, algorithm development, and architectural evaluations within regulated pharmaceutical and life sciences environments.

Senior backend engineer to own platform components, design and implement high-availability RESTful services, security architecture, data management, analytics pipelines, logging/monitoring, and collaborate on architecture, integration, code review, testing, and production deployments.

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.

Investigate and resolve data-quality issues in large-scale distributed systems. Design Java-based repair pipelines and idempotent correction jobs for high-volume datasets, debug existing code, use AWS services for queue-driven and batch workflows, optimize performance and concurrency, and communicate technical findings and risks to stakeholders.

Develop and maintain the Java client library and high-performance C/C++ server applications. Implement message parsers and feed handlers, optimize for extreme throughput and low latency, build tools for petabyte-scale processing, collaborate on build/deploy/CI practices, monitor uptime, and support smooth feature rollouts.

Designs, implements, and runs Java Spring Boot microservices and REST APIs; leads design, CI/CD, TDD, performance tuning, security, and cross-product collaboration. Coaches teams and owns product KPIs and production support.

Develop, test, and maintain a complex distributed processing application using Python and Java. Collaborate with product owners, data coaches, analysts, DBAs, and Agile teams to meet backend/frontend requirements. Work with distributed workloads (Spark/Hadoop), SQL/Snowflake, AWS, shell scripting, and job scheduling/process automation. Support delivery under Agile/SAFe practices and ensure alignment with program standards.

Design, develop, and maintain web-based UI and REST middleware for federal health IT systems. Participate in Agile/SAFe ceremonies, write design documents, implement features, resolve bugs, and support CI/CD pipelines while collaborating with product, QA, and stakeholders.

Lead backend architecture and implementation for Java Spring microservices, validate and own AI-assisted code, mentor engineers, collaborate with product to deliver features, and drive technical excellence and scalable, test-covered systems.

This role requires a Java/Cloud engineer with extensive experience in Java development, cloud technologies, and strong problem-solving skills, capable of working independently and communicating effectively with senior leadership.

Design, build, and maintain scalable J2EE business applications. Implement features, fix bugs, participate in code reviews, automate tests, optimize performance, and produce documentation.

Lead backend Java development and architecture for enterprise applications. Design and deliver scalable, resilient microservices and APIs, mentor developers, lead technical decisions, support production incidents, and implement CI/CD and cloud-native solutions on AWS.

Design, develop, and maintain Java-based backend services and APIs for KeeperApp. Own backend components, optimize MySQL schemas/queries, ensure performance and reliability, apply secure coding practices, participate in code reviews, and collaborate with product and engineering teams to deliver features iteratively.

Lead design, development, testing, and maintenance of enterprise Java microservices and front-end applications. Build APIs, CI/CD pipelines, and containerized deployments; troubleshoot production, ensure security/compliance, mentor junior developers, and collaborate within Agile teams.

Build and deliver backend enterprise web applications for Citi's Integrated Digital Assets Platform using Java/Spring and web3 technologies. Collaborate with distributed teams, follow best practices and design patterns, write technical documentation, resolve issues, and ensure scalability, reliability, and performance.

Design, build, and maintain secure, high-performance RESTful APIs and microservices using Java and Spring Boot. Collaborate with cross-functional teams, implement API security (OAuth2/JWT/OpenID Connect), optimize databases, integrate messaging systems, write unit/integration/API tests, participate in code reviews and architecture decisions, troubleshoot production issues, and contribute to CI/CD and DevSecOps practices.

Lead AEM developer responsible for Adobe CQ/AEM development with strong Java/J2EE skills; manage tag/script via Adobe DTM, A/B testing with Adobe Target, collaborate with PM/QA/UX, assist deployments and migrations, integrate social features, and generate Adobe SiteCatalyst reports.

Senior Java developer to build and maintain core Java/J2EE applications with faceted/index search capabilities using Apache Solr, Lucene, and Hibernate Search. Work may involve MySQL and distributed database technologies on a 12-month contract with possible extensions.