Top Senior Java Developer Jobs in Austin, TX

Senior individual-contributor backend engineer responsible for designing, building, and operating production-grade, highly available, strongly consistent services for wallet operations, transaction orchestration, blockchain integrations, and event-driven workflows. Implement secure, scalable APIs, cryptographic key management, Kafka-based event systems, observability with OpenTelemetry, CI/CD pipelines, and produce tests, API specs, and operational runbooks.

Develop and maintain scalable enterprise Java applications and Spring-based microservices. Responsibilities include hands-on coding, unit and system testing, debugging, technical documentation, performance optimization, troubleshooting distributed cloud environments, and adherence to software development and security standards. Collaborate with technical leads, architects, and cross-functional Agile teams to design and implement complex global applications.

Develop and support a mature Java court case management platform. Diagnose production issues across application, database, and integration layers; investigate ESB defects; work with XML/XSLT, JMS, SOAP, and REST services; collaborate on issue triage and documentation; and contribute to modernization from legacy Java frameworks toward Spring MVC and modern front-end technologies.

Diagnose and resolve complex production issues in a Java court case management platform. Responsibilities include debugging backend services, databases, ESB integrations, XML/XSLT transformations, JMS messaging, SOAP/REST services, and third-party e-filing systems. The engineer will collaborate on issue triage, document root-cause analyses, participate in code reviews, support legacy modernization toward Spring MVC and modern front-end frameworks, and maintain production system reliability.

Maintain and support Java-based healthcare SaaS applications across multiple customer environments. Responsibilities include bug fixes, feature delivery, refactoring, deployments, security remediation, SQL and data migrations, code reviews, configuration improvements, and production support. The role requires a generalist software engineer comfortable with Java, Angular, SQL, REST APIs, enterprise applications, and customer-facing environments.

Own and lead backend engineering initiatives for financial platforms, designing scalable Java and Ruby distributed services, Kafka data streams, PostgreSQL databases, AI-enabled features, and React components. The role includes production operations, observability, testing, and collaboration with product, architecture, and engineering teams to deliver resilient software.

Develop and maintain scalable Java and Spring Boot backend applications, microservices, and RESTful APIs. Responsibilities include database integration, code reviews, performance optimization, production troubleshooting, testing, CI/CD, cloud deployment, and collaboration with product, QA, and DevOps teams.

Develop and maintain scalable Java and Spring Boot backend applications and REST APIs. Optimize CPU, memory, and overall application performance; identify bottlenecks; resolve production issues; and contribute to architecture, code reviews, reliability, and scalability. The role also involves Node.js or Python FastAPI services, cross-functional collaboration, and potential work with GraphQL, generative AI, cloud platforms, containers, CI/CD, and monitoring tools.

Designs, develops, tests, documents, and operates large-scale distributed software products for Allstate’s Enterprise Payments organization. Responsibilities include building Java and Spring Boot REST APIs, designing microservices, collaborating on system architecture, practicing paired programming and test-driven development, establishing CI/CD pipelines, improving performance, securing APIs, supporting production applications, and contributing to Agile planning, retrospectives, and knowledge sharing.

Develop and maintain Java/J2EE applications using Spring, JBoss EAP, DB2, HTML5, and unit testing frameworks. The role requires experience with Eclipse or JBoss Developer Studio and prefers familiarity with Thymeleaf, Ant, Maven, Gradle, CVS, and Texas workforce and unemployment insurance systems.

Develop and test Java-based web applications using J2EE, JavaScript, JSP, Struts, portlets, WebSphere, SQL, DB2, web services, LDAP, XML, and Active Directory. Perform QA testing for high-volume web applications and support related Health and Human Services programs.

Develop Java applications and systems using Unix, WebSphere, JSF, Oracle or Sybase, Hibernate, Informatica, and Perl. Responsibilities include system design, validating requirements, creating application builds, version control, web services development, GUI development, rigorous testing, unit testing, Section 508 compliance, and customer support. The role also provides after-hours support and requires experience in state or federal government environments as a preferred qualification.

Develop RESTful front-end applications using HTML, CSS, JavaScript, JSON, jQuery, and front-end frameworks. The role requires building functional applications rather than static web pages and may involve UI/UX work. Backbone experience is a bonus.

Develop, enhance, and maintain enterprise Java/J2EE applications across all SDLC phases. Build portal, workflow, business process, web services, and mobile applications using WebSphere, Spring, Hibernate, Oracle, and related technologies. Apply object-oriented design, architecture, scalability, performance, integration, and testing best practices. The role requires extensive WebSphere Portal or BPM/ODM experience, database and web services development, and strong communication skills.

Develop Java applications using object-oriented programming, Spring, JPA/Hibernate, REST, web services, UNIX/Linux, and SOA. Build and maintain high-quality software, write unit tests and test automation, work with ESBs, message queues, and business rules engines, and collaborate with peers to meet project timelines. The role requires adaptability, accountability, strong communication, analytical skills, and the ability to learn new technologies.

Develop and maintain Java and J2EE/JEE applications using web services, Spring, Hibernate, JPA, SQL, JavaScript, and related technologies. Build automated unit tests, work within Agile teams, learn new frameworks, and potentially provide technical leadership. The role requires strong communication and time-management skills, with preferred experience in cloud and distributed computing, NoSQL, REST services, and modern web 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.

Investigate and resolve data-quality issues in large-scale distributed systems. Design Java-based repair pipelines and idempotent correction jobs for high-volume datasets, debug existing code, use AWS services for queue-driven and batch workflows, optimize performance and concurrency, and communicate technical findings and risks to stakeholders.

Designs, implements, and runs Java Spring Boot microservices and REST APIs; leads design, CI/CD, TDD, performance tuning, security, and cross-product collaboration. Coaches teams and owns product KPIs and production support.

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, build, and maintain scalable J2EE business applications. Implement features, fix bugs, participate in code reviews, automate tests, optimize performance, and produce documentation.

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.

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.