Top Java Developer Jobs

Participate in design, development, testing, debugging, and implementation of application systems. Work with stakeholders to define enhancements, support production systems, and apply Java/Python programming, Spring, microservices, and database technologies. Troubleshoot security vulnerabilities, mentor junior analysts, and adhere to Citi policies and development best practices.

Develop and maintain Java applications, build and deploy web services, and work with front-end frameworks like Angular or React. Requires knowledge in Spring and application design.

Design, build, and maintain secure, high-performance payment systems across backend (Spring Boot/WebFlux), frontend (React), databases (MySQL/Postgres), messaging, and AWS infrastructure. Implement REST APIs, OAuth2/JWT security, testing (JUnit/Mockito), observability (OpenTelemetry), and IaC (Terraform). Collaborate with product, QA, and distributed teams; mentor peers and resolve production issues.

Design, develop, and implement web-based Java applications and RESTful services using Java and Python. Build services on Hadoop data environments, create design documents, perform coding, testing, debugging, and help scale prototypes to production. Support a recommendation system for sales associates and address security/authentication concerns.

Develop, test, and maintain Java web applications (customer-facing and internal) for the NASA SEWP program. Design system components and interfaces, use design patterns, collaborate with developers and stakeholders, document designs and code, provide after-hours maintenance and Level II customer support, and adhere to agile processes and schedules.

Develop, maintain, and support Java web applications for the NASA SEWP program. Design system components, build customer-facing and internal web apps, document designs, follow design patterns, provide after-hours maintenance, and deliver Level II customer support.

Full‑stack Java developer responsible for front-end and back-end web development: build UIs (HTML/CSS/JavaScript), RESTful web services, integrate UI with services, and work with frameworks like Struts/Spring; Angular 2 experience is a plus. Requires 7+ years of relevant experience.

Modernize and migrate legacy Struts/JSP/Servlet applications to Spring Boot/Spring MVC and Angular. Develop RESTful APIs, refactor code for security and performance, write tests, troubleshoot defects, participate in Agile ceremonies, and use AI-assisted tools to accelerate analysis and documentation.

Design, develop, test, and implement web-based Java applications using Spring and Tomcat. Create design documents, debug and resolve technical issues, work across front-end and back-end systems, follow SDLC best practices, and collaborate with users and technical teams to gather requirements and drive engineering best practices.

Develop and implement scalable e-commerce system components per solution architecture. Collaborate with product, operations, and architecture teams, participate in sprint planning, produce documentation, create/modify tests and test harnesses, and assist in triaging production and non-production issues.

Develop and maintain Java/J2EE web applications and integrations using ESB technologies (Fuse, Camel, ServiceMix). Implement JMS messaging, optimize services for large-volume data, work with Oracle databases and PL/SQL, build SOAP/REST services, and perform data analysis and performance tuning using Java frameworks and related tools.

Port a PHP-based inventory tracking system to Java/Spring Boot and migrate a monolithic app to a service-oriented architecture on Cloud Foundry. Design, develop, and deploy large-scale Java projects, implement full-stack features (HTML/CSS/JS), integrate with Oracle, use GitHub, and follow cloud development principles.

Java Developer role in Chicago requiring expertise in Java 8, Spring and Spring Boot, Oracle/PL/SQL, and Test-Driven Development. Build, test, and maintain backend services, collaborate with team members, and ensure code quality through TDD practices.

Design, develop, and maintain Java/JEE enterprise applications. Perform full SDLC tasks, troubleshooting, DB ERD and data modeling, SQL tuning, code reviews, and produce software design and engineering documents.

Senior Java/J2EE developer to design and build UI components that display real-time data from a database. Must use GWT and integrate with Oracle Integration Suite. 6+ month C2C contract based in NYC.

Senior Java developer with strong core Java and web services experience. Requires at least 10 years of Java experience, architecture knowledge is a plus, and a minimum of 2 years in Capital Markets (recent experience preferred). Must have experience with onsite-offshore delivery models, strong written and verbal communication, and be willing to work on-site in New York City.

Senior Java Developer to build middle-tier/back-end systems and create web services from scratch. Requires 5+ years back-end development experience. 1+ year contract in Indianapolis. PMI certification required. W2 consultants only; start ASAP.

Develop and maintain Java/JEE applications with emphasis on web services (JAX-WS), JPA/Hibernate persistence, XML schema design, web-service security, and automated testing (JUnit/SOAP UI). Work with Struts, Spring, JSP/Servlets, JDBC/SQL and front-end technologies (JavaScript, jQuery, AJAX).

Contract Java developer to design and implement server-side J2EE applications using Spring, Web Services and related web technologies. Responsibilities include backend development, database design and tuning, messaging integration, deployment to web/app servers, and supporting cross-asset fixed income domain requirements.

Develop and maintain complex global web applications using Java/J2EE, Struts, Spring, and Hibernate. Design and construct product features, write SQL and stored procedures, implement XML and web services, and collaborate to solve technical problems with strong communication and analytical skills.

Design, develop and troubleshoot Java/J2EE applications; customize software per customer needs; work with Java/C++ and SQL Server; interact with customers for requirements, project activities, and ensure strong communication and customer satisfaction.

Contract Java Developer to perform Java development (2–5 years), testing and test-data creation/management, data conversion and file migration, report generation, SQL query work, and use IBM RAD. Requires a BA/BS in IT.

Develop, maintain, and support Java application deployments and integration scripts. Build and update Ant/Maven scripts, use ClearCase/GitHub and Jenkins CI, debug compilation issues, coordinate deployments across SIT/UAT, manage application server configurations (WebLogic/JBoss), and produce documentation and Excel-based tracking. Strong UNIX command-line skills required.

Contract Java Developer to perform analysis, coding, unit/system testing, and documentation for JPMC application. Participate in walkthroughs of requirements, design, and code. Must have Core Java, Servlets, JSP, and Spring. 12-month contract based in Fishers, IN. Requires 5+ years experience.

Senior front-end developer building complex, interactive web applications using advanced JavaScript, HTML5, and CSS3. Collaborate with UX, product, and backend (Ruby/Java) teams to design reusable components, enforce client-side business logic, write unit tests, and improve product and processes in an Agile environment.