Top Java Developer Jobs in St. Louis, MO

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.

Design, build, and support cloud-native full stack or backend Java products using TDD, CI/CD, microservices and event-driven patterns. Collaborate with product teams, provide production support, implement monitoring and ensure secure, performant systems.

Develop and integrate SOAP and REST APIs using Mule ESB and Java. Implement XPath and XSLT transformations, apply SOA and web services best practices, coordinate across teams, and produce clear technical documentation.

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.

Design and implement Node.js/JavaScript solutions including REST/SOAP services, cryptography (X.509/CMP), PostgreSQL integration, and deployment on Unix/macOS with web servers (Apache, Nginx, Tomcat, JBoss). Collaborate using GitHub and tools like Hapi/Redis. Strong communication skills; 6-month engagement.

Develop and maintain Java-based enterprise applications using JPA/Hibernate, Spring, and REST. Analyze and document requirements, write and test code, deploy and integrate systems, evaluate vendor software, and enforce quality standards. Lead and mentor developers, create training materials, and communicate status to management while following Agile practices.

Design, develop, test, and implement Java/J2EE applications across full SDLC. Produce JUnit test cases, technical design documents, and integrate systems using WebSphere, RAD/Eclipse, JDBC, XML technologies. Work with business customers and Agile Scrum teams to analyze requirements and deliver SOX-compliant solutions.

Design and implement Java/J2EE server-side applications. Translate functional and non-functional requirements into system requirements. Develop using Spring, Hibernate, REST/SOAP web services, PL/SQL, servlets/JSP, JDBC, EJB, and logging (log4j). Use build and dev tools (Eclipse, RAD, SoapUI, XML Spy, ANT, SVN/CVS). Telecom domain experience required.

Design and implement Java/J2EE enterprise applications using Spring and Hibernate. Translate functional/non-functional requirements to system requirements. Build REST and SOAP web services, perform PL/SQL development, and implement server-side components (Servlets, JSP, EJB). Use build and dev tools (Eclipse, Ant, SVN, SoapUI). Domain experience in Telecom required.

Design and implement large-scale enterprise J2EE applications, translate functional/non-functional requirements to system specs, develop server-side Java components and UI using HTML5/jQuery/AngularJS, build REST/SOAP services, use Spring/Hibernate and PL/SQL, work in Agile, lead architecture for projects, collaborate with teams, interface with clients, and support global delivery with regular travel.

Design, develop and implement Java/J2EE applications using Spring and Hibernate; build REST and SOAP web services; translate functional/non-functional requirements into system requirements; develop server-side components (Servlets, JSP, EJB, JDBC); write PL/SQL; use build and version tools (Eclipse, ANT, SVN/CVS); work within the Telecom domain.

Design, develop and implement Java/J2EE server-side applications using Spring/Hibernate. Build REST/SOAP web services, write PL/SQL, and use tools like Eclipse, ANT, SVN. Work in a telecom domain environment and translate functional requirements to system design.

Design, architect and implement large-scale Java/J2EE enterprise applications. Develop server-side components, REST/SOAP web services, and UI using HTML5/jQuery/AngularJS. Lead architecture, translate requirements into system design, work in Agile teams, interface with clients, and support global delivery with regular travel.

Develop and implement Java/J2EE server-side applications using Spring/Hibernate, REST/SOAP web services, PL/SQL, and build tools. Translate functional requirements into system designs and work within the telecom domain.

Design, build, and maintain scalable enterprise full-stack applications using Java, Spring Boot, microservices, and modern front-end frameworks. Implement cloud-based solutions on AWS, contribute to CI/CD and DevOps automation, optimize performance and security, and integrate AI-driven capabilities using Python and orchestration tools like LangChain and LangGraph.

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.

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.

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.

Lead reverse-engineering of TIBCO BW/MFT processes, document business rules, and reimplement them as modular Java/Spring Boot microservices. Migrate protocols to Kafka/RabbitMQ/REST, ensure data consistency, and perform performance testing to match legacy SLAs.

Design and build Java/J2EE solutions using Spring and APIs; develop webservices, DB schemas, PL/SQL and transactional SQL in DB2/Oracle; collaborate with architects, developers and DevOps to implement CI/CD (Jenkins, uDeploy), ensure code quality (Sonar), perform code reviews and testing, resolve technical roadblocks, and drive process improvements. Requires strong communication and teamwork.

Design, develop, and modernize software by translating legacy mainframe code (COBOL/ASM/JCL/Copybooks) into Java microservices. Support UI integration, relational and hierarchical databases, batch and real-time processing, CI/CD, cloud-native and ZT/ICAM integration, and use AI/ML tools to assist translation and optimization. Work supports pre-production, testing, and integration activities.

Develop and maintain core Elasticsearch infrastructure and shared platform features. Design scalable APIs, solve performance and concurrency issues, improve observability and CI/CD, automate developer workflows, lead cross-team projects, support complex operational investigations, and use AI to accelerate development and debugging.