We're seeking an experienced Principal Java/Bespoke Software Engineer to join a high-performing technology team supporting a mission-critical operational platform.
About the Agency Our client is a large Federal Government agency delivering critical services to Australians.
The organisation operates complex enterprise systems and invests heavily in contemporary technology platforms to support nationally significant operations.
Key Responsibilities As a Principal Engineer, you'll play a key role in the ongoing support, maintenance and enhancement of a complex enterprise application environment.
Working alongside highly skilled developers and subject matter experts, you will contribute to the design, development and operation of business-critical solutions across Java, AWS and Oracle technologies.
Responsibilities include: Developing and maintaining enterprise-grade Java applications and integrations Designing and implementing scalable cloud-based solutions using AWS Supporting Oracle database development, integration and optimisation Contributing to DevOps,



CI/CD and release management activities Producing technical documentation and providing expert technical advice Participating in a shared on-call support roster for critical applications About You You are a senior software engineering professional with extensive experience delivering complex enterprise solutions in large-scale settings.
You enjoy solving challenging technical problems and are comfortable operating as both a hands-on developer and trusted technical adviser.
You will bring: Min 8 years Java experience, enterprise design patterns, JPA, Hibernate ORM, JEE an advantage, reactive programming an advantage.
Java Web service development, SOAP and REST APIs, OpenAPI/XSD Schemas, XML/JSON, Spring/SpringBoot.
Experience with AWS services such as EC2, Lambda, API Gateway, S3 and SQS Solid Oracle database and PL/SQL capability Experience with REST and SOAP integrations, OpenAPI and enterprise messaging Working knowledge of Jenkins, Git, Maven and DevOps practices Willingness to be 24x7 on-call (rare, approx. once per year).
Excellent written and verbal communication skills MUST HAVE Australian Citizenship and Baseline Security Clearance If you're looking for a long-term opportunity where your work will genuinely make a difference, we'd love to hear from you.
How to Apply?
For more information about this role, contact Rennel Richardson at

📌 Principal Java/bespoke Software Engineer Developer Canberra (Australia)
🏢 On Q Recruitment
📍 Australia