Top Senior Java Developer Jobs in Austin, TX

Design and build Java/Spring-based microservices and Kafka integrations. Create/design RESTful and SOAP web services, work with AWS, Spark/Big Data, and related messaging (RabbitMQ). Contribute to application design, potentially lead a small team, and work in Agile/DevOps environments; payments experience is a plus.

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 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.

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.

Senior Java developer to maintain and scale a high‑profile sales application (Spectrum). Work includes Java backend development, REST web services, MySQL/Oracle integration, using Eclipse, EJB, JBoss and GWT frontend components. Collaborate with a small dev/QA team, redesign parts of the app, add interactive engineering document features, and follow agile practices. Strong communication skills required. Contract 6+ months.

Senior Java developer focused on front-tier development of a highly interactive application. Build and maintain GUI using Swing or GWT, implement and consume REST web services, work with MySQL, EJB, and JBoss, and develop using Eclipse IDE. Collaborate with team using common CI/CD and SCM tools.

Participate in full system lifecycle: analyze requirements, design, code, test, and implement J2EE web applications and integrations. Work with DBMS, application servers, build/release tools, and source control to deliver on-time 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.

Develop and maintain full-stack web and enterprise applications using Java and JavaScript stacks (Spring, Hibernate, Node/MEAN, AngularJS). Build and consume SOAP/REST services, design data models (SQL and NoSQL), implement multithreaded server-side features, apply testing (JUnit, Karma/Jasmine), and work across SDLC/TDD. Participate in performance troubleshooting, cloud (AWS) deployments, and responsive UI development using HTML5/CSS3 and JS frameworks.

The role involves design and development of web applications, coding enhancements, and testing complex modules using Java and related technologies. Excellent communication skills are required, and local candidates are preferred.

KRG Technologies is seeking a Java Developer with at least 8 years of experience in Java/J2EE, networking, and related technologies.

The Senior Java Developer will lead the core platform team in developing scalable Java applications using various technologies within 2-week sprints.

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.

Optimize and scale blockchain node performance, design and implement core system plugins, collaborate with cross-functional teams, conduct performance testing and debugging, and stay current on blockchain and distributed systems technologies to maintain reliable infrastructure.

Develop and maintain Java backend services for enterprise blockchain applications, integrate APIs with React/Vue frontends, design scalable blockchain solutions, troubleshoot complex backend issues, and collaborate with the team to apply best practices and stay current with blockchain trends.

Lead design and implementation of payer-centric interoperability platforms, focusing on FHIR services and secure healthcare data exchange. Mentor engineers and improve scalability in production environments.

Senior Java Developer to support and convert ILMT V7.2 to V9.x, implement IBM BigFix infrastructure, convert Java and shell scripts, perform installation, configuration, troubleshooting, documentation, and process development while collaborating with vendors and business users.