Top Senior Java Developer Jobs in Austin, TX

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.

Develop, test, maintain, and support secure, scalable full-stack Java applications with Angular user interfaces. Write complex code and SQL, create technical designs and documentation, conduct code and design reviews, and ensure compliance with security, audit, regulatory, and SDLC requirements. Collaborate with architects and business partners in an Agile/Scrum environment, lead project delivery, mentor globally distributed junior engineers, and participate in on-call support.

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.

Develop secure, scalable Java applications within an agile engineering team. Provide technical guidance, review and debug production code, influence application design and technical processes, and serve as a subject matter expert. Lead adoption of AI-assisted development tools with validation for security, performance, and correctness. Apply SDLC, CI/CD, resiliency, security, and Kubernetes expertise while supporting containerized applications and collaborating with technical teams, contractors, and vendors.

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.

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.

Design, build, and optimize a multi-region, highly-available Java/Scala microservices data pipeline processing thousands of messages/sec. Improve performance, implement fraud-detection pipelines with ML (Kafka/Kafka Streams), deploy to multi-cloud Kubernetes, and push frequent production releases to maintain five-nines uptime.

Design, develop, test, and maintain backend services using Java and Python within a microservices architecture. Collaborate with architects, product owners, and infrastructure to deploy containerized applications, tune performance, implement CI/CD, and support production systems. Participate in code reviews, agile ceremonies, and technical design to deliver scalable, high-quality solutions.

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.

Develop, test, and maintain a complex distributed processing application using Python and Java. Collaborate with product owners, data coaches, analysts, DBAs, and Agile teams to meet backend/frontend requirements. Work with distributed workloads (Spark/Hadoop), SQL/Snowflake, AWS, shell scripting, and job scheduling/process automation. Support delivery under Agile/SAFe practices and ensure alignment with program standards.

Design, develop, and maintain web-based UI and REST middleware for federal health IT systems. Participate in Agile/SAFe ceremonies, write design documents, implement features, resolve bugs, and support CI/CD pipelines while collaborating with product, QA, and stakeholders.

Lead backend architecture and implementation for Java Spring microservices, validate and own AI-assisted code, mentor engineers, collaborate with product to deliver features, and drive technical excellence and scalable, test-covered systems.

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.

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 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.

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.

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.

Design, build, and maintain secure, high-performance RESTful APIs and microservices using Java and Spring Boot. Collaborate with cross-functional teams, implement API security (OAuth2/JWT/OpenID Connect), optimize databases, integrate messaging systems, write unit/integration/API tests, participate in code reviews and architecture decisions, troubleshoot production issues, and contribute to CI/CD and DevSecOps practices.

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 to maintain and redesign a scalable sales/procurement application (Spectrum). Work includes backend development (Java, REST), database integration (MySQL/Oracle), and collaboration with distributed teams to support dealer scale-up and add engineering document features.

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.

Design, develop, integrate, and support middle-tier integration solutions and a knowledge platform. Author design specs, implement SOA/REST services, perform unit/integration testing, and prototype new technologies for scalable multi-vendor systems.