Senior Engineer / Tech Lead

Halcyon Knights; City of Melbourne; Hybrid; AUD 120,000 - 150,000; Full time

Job summary

Halcyon Knights in Melbourne is seeking a Senior Software Engineer to own and evolve a business-critical POS platform. You will work across Java, Spring and React, delivering backend services and user-facing features while contributing to architecture and engineering standards.

The role blends hands-on development with complex integrations, problem-solving and leadership, offering progress toward technical leadership in a hybrid permanent setup.

Qualifications

• Strong commercial experience with Java and Spring.
• Frontend development with React.
• Experience with APIs, integrations and distributed systems.
• Experience on production-critical platforms.
• CI/CD tooling experience (Azure DevOps, Git).

Responsibilities

• Design backend services with Java and Spring.
• Develop UI with React.
• Own components across POS, back-office and store environments.
• Integrate with ERP systems, payment gateways, loyalty platforms and enterprise applications.
• Support reliable transaction processing across distributed systems.
• Lead root cause analysis of production incidents.
• Improve CI/CD pipelines, testing, releases and deployment automation.
• Monitor performance, reliability and platform capacity.
• Contribute to architecture and technical decision-making.
• Mentor engineers and collaborate with stakeholders.

Skills

Java

Spring

React

APIs

CI/CD

Database

Troubleshooting

Architecture

Communication

Tools

Azure DevOps

Git

Job description

• Own and evolve a business-critical retail POS platform
• Hands-on role across Java, Spring and React
• Progress towards technical leadership or architecture

Senior Software Engineer - Java, Spring & React Melbourne | Hybrid | Permanent

• Own and evolve a business-critical retail POS platform
• Hands-on role across Java, Spring and React
• Progress towards technical leadership or architecture

The opportunity

We’re partnering with a large organisation seeking a Senior Software Engineer to help own and evolve a critical POS platform operating across an extensive national store network. Working across Java, Spring and React, you’ll contribute to the development, stability and scalability of POS, back-office and wider store systems. The role combines hands-on engineering with complex integrations, production problem-solving and technical leadership. This would suit a strong Senior Engineer ready for greater ownership or a hands-on Tech Lead looking to influence architecture and engineering standards.

What you’ll be doing

• Designing and developing backend services using Java and Spring
• Building and improving user-facing applications with React
• Taking ownership of components across POS, back-office and store environments
• Integrating with ERP systems, payment gateways, loyalty platforms and enterprise applications
• Supporting reliable transaction processing across distributed systems
• Investigating production incidents and leading root cause analysis
• Improving CI/CD pipelines, testing, releases and deployment automation
• Monitoring performance, reliability and platform capacity
• Contributing to architecture and technical decision-making
• Mentoring engineers and collaborating with technical and business stakeholders

What we’re looking for

• Strong commercial experience with Java and Spring
• Frontend development experience using React
• Experience with APIs, integrations and distributed systems
• Confidence working with complex, production-critical platforms
• Familiarity with CI/CD tooling such as Azure DevOps and Git
• Solid database, performance and troubleshooting knowledge
• Strong communication and stakeholder management skills

Experience with retail or POS systems, ERP integrations, payments or loyalty platforms would be highly regarded. Exposure to observability tools, scripting, automation, Windows/Linux environments or infrastructure fundamentals would also be beneficial.

Why consider this role?

You’ll have genuine ownership of a high-impact platform used across a large retail network, with the opportunity to solve complex engineering challenges and progress towards broader technical leadership or architecture.