Top Senior Java Developer Jobs in Denver & Boulder, CO

Design and implement scalable microservices and customer/internal APIs. Lead technical specification, development, integration, testing, and release. Optimize performance, refactor code, collaborate with stakeholders, mentor engineers, and ensure reliable, maintainable solutions across the platform.

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.

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.

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 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.

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 Java EE applications and web services using Spring and Hibernate. Implement SOAP/REST APIs, and utilize CI/CD tools like Jenkins. Engage with cloud technologies and improve business processes.

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

Design, develop, test, deploy, and maintain enterprise Java applications for USPS. Build RESTful APIs with Spring, translate requirements into architecture, implement CI/CD/DevSecOps, integrate relational databases, troubleshoot complex issues, and collaborate with cross-functional Agile teams to deliver high-quality software solutions.

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.

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.

Lead design and delivery of scalable, resilient distributed systems. Act as technical authority across teams, mentor engineers, drive architecture and CI/CD best practices, troubleshoot production issues, optimize performance, and enhance observability while writing production-grade Java.

Design, develop, test and maintain Java/J2EE web applications using Spring, Hibernate and related frameworks. Build MVC-based systems, implement front-end features with Angular/Bootstrap, write SQL and stored procedures, integrate messaging (MQ/JMS), use CI/build tools (Ant/Maven), and follow Agile processes while using version control and testing frameworks.

Senior Java Developer responsible for designing, implementing, and testing Java/J2EE web applications. Work includes backend development with Spring/Hibernate/JDBC, messaging (JMS/MQ), front-end using Angular/Bootstrap, database design and SQL (Oracle/SQL Server/MySQL), application servers (Tomcat/JBoss/WebLogic), automated builds/tests (Ant/Maven, JUnit/TestNG), and participating in Agile ceremonies and SDLC activities.

Senior Java Developer responsible for designing, developing, testing and maintaining Java/J2EE web applications using Spring, Hibernate, JMS and related front-end technologies. Participates in requirements analysis, design sessions, estimations, Agile ceremonies, coding, unit/integration testing, SQL/stored procedure development, and deployment using Maven/Ant. Uses version control, CI/build tools and application servers (Tomcat/JBoss/WebLogic). Preferred experience includes messaging, big data and cloud platforms.

Develop and maintain enterprise-class Java software for centralized management of hyper-converged data center products. Collaborate with architects, product management, QA and system test in an Agile/Scrum environment. Implement REST APIs, automate data center and firmware operations, integrate with VMware and databases, ensure code quality and supportability, and deliver frequent releases.

Develop and maintain Java/ATG applications using J2EE stack, web services, and front-end technologies. Work across SDLC phases, collaborate with stakeholders, troubleshoot complex issues, and integrate with Oracle DB, WebLogic, AWS, microservices, and messaging systems.

Develop and maintain enterprise-class Java backend software for centralized management of hyperconverged data center products. Collaborate with cross-functional teams in an Agile/Scrum environment, integrate core product components, work with VMware and cloud automation tooling, and drive software design, quality, and supportability.

Design, develop, test and maintain enterprise Java/J2EE web applications using Spring, Hibernate and related frameworks. Work across SDLC in Agile/Waterfall, implement front-end components (Angular/Bootstrap), integrate messaging (JMS/MQ) and databases (Oracle/SQL Server/MySQL), use build and CI tools, and participate in estimation, code reviews and deployment.

Senior Java Developer responsible for designing, implementing, and testing Java/J2EE web applications using Spring, Hibernate, JMS/MQ, and SQL. Work includes front-end integration (Angular/Bootstrap), application server deployment, database development, unit and integration testing, and participating in Agile ceremonies and design sessions.

Design, develop, test and maintain Java/J2EE web applications and backend services using Spring, Hibernate, messaging and RDBMS. Participate in requirements analysis, architecture and Agile ceremonies, write SQL and stored procedures, build/deploy with ANT/Maven, and use testing and CI tools to ensure high-quality deliverables.

Senior Java ATG developer responsible for full-stack development using ATG, Java/J2EE, web services, front-end technologies, and frameworks. Work includes database integration with Oracle/JDBC/PL-SQL, microservices and messaging (RabbitMQ), cloud (AWS), iOS/Swift exposure, participating across the SDLC, debugging, and collaborating with stakeholders and cross-functional teams.