Top Java Developer Jobs in Denver & Boulder, CO

Design, build, and maintain scalable Java/Spring Boot backend services; implement event-driven systems with Kafka (producers/consumers, stream processing); design and optimize caching with Redis and in-memory strategies; perform performance tuning and bottleneck analysis; take end-to-end ownership of components, debug production issues, and collaborate in fast-paced environments while enforcing code quality and reusable designs.

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.

Design, build, and maintain server-side Java applications and RESTful APIs. Optimize performance and scalability, ensure security, collaborate with cross-functional teams, perform code reviews, troubleshoot production issues, and document system architecture.

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.

Develop and maintain scalable backend systems using Java and Spring Boot; design microservices; collaborate with customer teams; improve performance, reliability, and security; participate in code reviews; document solutions; troubleshoot and optimize backend systems.

Senior Java developer responsible for designing, developing, and deploying Java/J2EE web applications and web services (SOAP/REST). Work includes microservices development, CI/CD, Tomcat/WebLogic deployments, JDBC/Hibernate/iBatis integration, caching, performance tuning, and supporting assessment/design/code/build/deploy phases for US Cable MSO systems.

Develop and maintain Java/J2EE web applications and microservices using Spring, JSP, Tomcat/WebLogic. Implement CI/CD pipelines, follow SDLC, collaborate with global teams, and support Cable/MSO domain solutions.

Develop and maintain Java/J2EE web applications and web services (SOAP/REST); build and support microservices and CI/CD pipelines; deploy to Tomcat/WebLogic; work with JDBC/Hibernate/iBatis and caching; perform performance engineering, capacity planning, and assess design/code/build/deploy for microservices. Support US Cable MSO IT systems.

Senior Java developer responsible for designing, developing, and deploying Java/J2EE web applications and microservices. Work includes SOAP/REST web services, CI/CD, Tomcat/WebLogic deployments, JDBC/Hibernate/iBatis integration, performance tuning, and supporting assessment/design/code/build/deploy phases, primarily for US cable MSO IT systems.

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.

Develop and maintain Java applications using Spring Boot and Spring Batch. Design and integrate microservices, build secure high-performance REST/OData APIs, write JUnit tests, ensure code quality, and optimize SQL database queries.

Design, build, and deploy secure, high-performance, scalable cloud-native applications supporting Ariba P2P. Work full-stack in Java using Spring Boot and the SAP BTP Cloud Foundry CAP (Java) model, applying resiliency, security, and performance best practices.

Develop and maintain Java Spring Boot services with multithreading and Spring Batch. Build OData/REST APIs, write high-coverage JUnit tests, and author SQL queries. Ensure robust exception handling and code quality; collaborate on automation and UI work where needed.

Design, develop, test, and deploy Java/J2EE applications and integrations. Lead implementation planning, gather and specify requirements, mentor junior developers, resolve defects, support production (on-call), and ensure database and SOX-compliant process documentation.

Lead design and implementation of scalable, cloud-native (AWS) data platforms and pipelines. Mentor teams, drive technical decisions and enterprise architecture, ensure security and high availability, work cross-functionally with customers and product teams, and support/maintain production systems and APIs.

The role involves developing applications using Java and Spring, conducting business analysis, and ensuring alignment between technical teams and stakeholders.

Develop, modify, and debug software for client applications on Linux. Collaborate with teams and document processes. Requires expertise in Java development.

Develop and maintain high-performance Java applications, work on web and mobile applications, and collaborate in Agile/Scrum teams.

Develop mission-critical Java applications using Spring and Angular in agile teams. Collaborate with users on design, use Linux and source control (Git/GitLab/Bitbucket), track work in Jira/Confluence, and work onsite. Active TS/SCI with CI poly required.

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.

The Java Engineer will work on a small team to build a new data platform, utilizing Core Java and the Spring framework.

The Java Engineer will design, develop, implement, and support systems for processing massive real-time data, collaborating with a team of 20 developers.