Java Application Support Engineer

4 weeks ago

Sydney, New South Wales, Australia The Onset Full time

Java Application Support Engineer | Contract | Up to $900 day

  • Hybrid, 3 days a week in office
  • Sydney CBD
  • 12-month contract
  • Quick 2 round-interview process

We're hiring a Java-based Application Support Engineer contractor to join a high-performing team within one of Australia's leading financial institutions, supporting complex, cloud-hosted banking applications.

This is a newly created position where you'll have a chance to work with cutting-edge tools across cloud, microservices, event-driven systems, containers, and real-time data, all within a large-scale production environment.

You'll be the go-to person for triaging technical issues that impact customer-facing banking systems—from payments and accounts to loan servicing—while collaborating closely with engineering, product, and incident response teams.

Key Responsibilities:
  • Diagnose and resolve complex production issues in Java-based systems
  • Act as a key liaison between engineering and 24/7 support/incident teams
  • Investigate root causes, raise bugs with dev teams, and suggest fixes
  • Coordinate ticket handling within agreed SLAs and improve documentation
  • Contribute to tooling and process improvements for issue triaging
  • Participate in occasional on-call rotations and share learnings across the team
What we're looking for:
  • Strong Java debugging and application support experience
  • Exposure to cloud platforms (AWS or GCP), containers, microservices & APIs
  • Experience with SQL/NoSQL databases, event streaming, and CI/CD tooling
  • Familiarity with Site Reliability practices and performance monitoring tools
  • Excellent communication skills and a proactive, solution-focused mindset

If you're interested, APPLY HERE or reach out to Monica@theonset.com.au

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