Java Developer - API/MuleSoft

Title: Java Developer - API/MuleSoft

Location: Sydney/Melbourne

Permanent role.

The Role

As a Senior Java Software Engineer, you will design, develop, and deliver scalable APIs, microservices, and integration solutions using Java, Spring Boot, and MuleSoft.

You’ll work closely with architects, developers, product teams and business stakeholders to build secure, resilient and high-performing integration solutions, connecting applications and modernising legacy environments.

Key Responsibilities

• Design and develop RESTful APIs and microservices using Java and Spring Boot
• Develop and support MuleSoft integration solutions, APIs and workflows
• Build scalable and secure integrations across complex enterprise systems
• Contribute to API-led integration and microservices architectures
• Develop API specifications, models and supporting documentation
• Perform unit testing, integration testing, code reviews and troubleshooting
• Work with architects and technical teams on solution design and integration patterns
• Support CI/CD pipelines and DevOps-driven delivery
• Integrate applications across cloud, on-premise and hybrid environments
• Support legacy modernisation and migration to API-led and cloud-native architectures

Core Technical Skills

• Strong commercial experience with Java 8+ and Spring/Spring Boot
• Strong hands-on REST API development
• MuleSoft / Anypoint Platform development and integration experience
• Experience with MuleSoft API-led connectivity and integration patterns
• Strong understanding of microservices architecture
• Experience with Swagger/OpenAPI and Postman
• Experience with API security, governance and best practices
• Strong understanding of enterprise integration patterns

Additional Experience

• Docker and Kubernetes
• AWS and/or Azure
• SQL and NoSQL databases, including MongoDB
• Event-driven and serverless architectures
• CI/CD and DevOps practices
• API management platforms and enterprise middleware
• Experience with messaging technologies and distributed systems
• Exposure to Node.js, React.js or other modern technologies is desirable