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 up-to-date 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 environments. 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
- Strong 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 ***********@onqrecruitment.com.au
Additional information

- Canberra (Hybrid) | 12-Month Contract + Possible Extension
- EL2 Equivalent | Principal-Level Engineering Opportunity
- MUST BE an Australian Citizen | Baseline Clearance

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