Top Java Developer Jobs in Sydney

Designs, develops, tests, and maintains Java microservices and MuleSoft enterprise integrations. Builds REST APIs, manages API security and lifecycle processes, creates automated tests, and supports CI/CD, Docker, Kubernetes, and cloud deployments. Monitors applications, troubleshoots production issues, performs root-cause analysis, and collaborates with cross-functional Agile teams throughout the SDLC.

Designs, builds, tests, and maintains scalable full-stack software using Java and React. Responsibilities include feature design, code reviews, cloud-native development, debugging, performance optimization, containerization, CI/CD, automated testing, and collaboration with product and engineering teams. The role emphasizes technical growth, mentorship, quality engineering, and adoption of modern and AI-assisted development tools.

Develop and maintain server-side Java applications for a financial markets exchange. Responsibilities include implementing bug fixes and feature enhancements, refactoring legacy code, adopting current technologies and development practices, and providing development support to the business. The role also includes some front-end development and requires collaboration with business stakeholders.

Design and develop scalable software solutions, collaborate with team members, and ensure highest quality standards through best practices in software development.

Design, develop and deploy server-side components and real-time data feeds using Java/J2EE/EJB. Ensure database performance, reliability, security and availability. Develop, monitor and optimize EJB and other server-side components while following SDLC practices and contributing to system architecture.

Design, implement, and maintain backend systems for a centralized exchange (CEX). Lead architecture and development of payment systems, trading matching engines, real-time compute and middleware platforms. Drive technical reviews, troubleshooting, refactoring, and mentoring to ensure system stability, performance, and engineering standards.

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 cross-functional teams while staying current with blockchain best practices.

Optimize and scale blockchain node performance, design and implement core system plugins, collaborate with cross-functional teams, perform performance testing and debugging, and stay current with blockchain infrastructure trends.