Top Senior Java Developer Jobs in St. Louis, MO

Full Stack Developer responsible for front-end and back-end development of SPA and microservices. Build RESTful services and UI using React/Redux, Vue/Angular, Node.js, Java, and PostgreSQL on AWS within agile short-sprint teams. Deliver scalable microservices and apply best practices for single-page architectures.

Designs and architects Java/J2EE applications: analyzes specs, produces conceptual and detailed designs, recommends solutions with BAs/management, implements multi-tier systems using Java frameworks, web services, build tools, and databases.

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.

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.

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.

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.

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.

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.

Build and maintain backend services and REST APIs using Java (11/17+) and .NET (ASP.NET Core). Implement business logic, data access, and integrations; write well-tested code with JUnit/xUnit/NUnit; contribute to CI/CD and DevOps; participate in design, code reviews, and Agile ceremonies.

Design, build, and improve Elasticsearch distributed-systems components for scalable, concurrent, and consistent indexing. Maintain cluster coordination for performance and resilience, push system scale limits, investigate performance and concurrency issues, support operations/support engineers, and lead projects involving multiple engineers from design through delivery.

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.

Lead Java Developer responsible for developing Spring/Hibernate-based web applications, requiring strong Java OO experience and business domain modeling skills.

Design, develop, and implement applications using Java and various technologies. Ensure quality code, support production, conduct testing, and collaborate with teams.

Design, develop, test, operate and maintain cloud-native, microservices-based applications. Write production-ready code, perform code reviews, ensure security/compliance, improve reliability, and collaborate across teams using DevOps practices.

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.

Senior Java Software Engineer responsible for full SDLC on the Vehicle Management Team: developing prototypes, coding Java/J2EE applications, analyzing requirements, configuring J2EE servers, performing unit/integration testing, and collaborating with IT teams on web, mobile, and cloud solutions using Spring, Hibernate, Struts, Oracle, and Web Services.

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 full-stack web applications using Java, Spring Boot, React, and Oracle. Build microservices and event-driven APIs (REST/GraphQL), implement CI/CD pipelines and DevOps tooling (Docker, Jenkins, OpenShift), apply cloud-native patterns (AWS preferred), and automate unit/integration/end-to-end tests within Agile teams using JIRA.

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 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, 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.