Top Java Developer Jobs in Milwaukee, WI

Develop and maintain Java-based, API-first enterprise applications and integrations. Assist full SDLC tasks—design, code, test, deploy, and support—while collaborating with business, infrastructure, and security teams and using AI-assisted development tools.

Seeking a Java Developer with project leadership experience for requirements gathering, design, implementation, and testing. Will involve customizing and supporting the KNOVA KM application.

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.

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, 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.

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

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 develop Java/J2EE applications and frontend UI using Angular or React. Build SOAP/REST web services, RESTful APIs with Node.js or Spring Boot, use Struts/Spring/Hibernate and JMS, work with SQL and document databases, configure application servers (WebSphere), and lead client-facing, insurance-domain projects.

Develop and maintain Java/J2EE applications using Struts, Spring, Hibernate and JMS; build SOAP/REST web services and RESTful APIs with Node.js or Spring Boot; implement front-end UIs with Angular or React and Bootstrap/Foundation; work with SQL and document databases; configure WebSphere and application servers; collaborate with clients and stakeholders in the insurance domain.

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.

The Senior Application Developer at MGIC is responsible for planning and developing solutions, providing support, and enhancing applications while following coding standards and SDLC practices.

Design, develop, test, deploy and maintain enterprise Java applications. Lead architecture reviews, optimize performance, perform code reviews, and mentor developers. Work in microservice environments using Spring, REST, JPA, SQL and CI/CD practices while collaborating with cross-functional teams to deliver timely, high-quality software.

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 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.

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 operate Java Spring Boot microservices, deploy and manage services on Kubernetes, perform JVM profiling and heap analysis, load test, diagnose memory leaks, OOMs and P99 latency spikes, remediate security vulnerabilities, and maintain GitHub-based CI/CD and branching workflows.

You will design, build, and maintain scalable applications using Java and JavaScript, collaborating across teams and managing databases.

Design, develop, and maintain Java applications using Spring/Hibernate. Build RESTful services, unit/integration tests, and work with messaging systems (JMS/Kafka/Pulsar/RabbitMQ). Troubleshoot production with Splunk/AppDynamics, use Maven/Git and IDEs (Eclipse/IntelliJ), and collaborate with teammates.

Design, develop, and maintain Java-based backend services and RESTful APIs; integrate third-party services; apply TypeScript for type safety; use AWS services (Lambda, API Gateway, DynamoDB, DocumentDB, CDK, CodePipeline); and work with containerization (Docker, Kubernetes).

As a Senior Software Engineer, you will maintain and develop data connectors, enhance data integrations, and improve developer experience within the ClickHouse data ecosystem.

Join a small team to design and deliver high-quality, low-maintenance Java applications. Coach client teams on modern development practices, apply test-driven development, and pursue ongoing professional growth through training and mentorship.