Senior Software Engineer - AI Transformation using Java

Join a high-impact engineering team rebuilding the technology backbone of one of Australia's most critical pieces of f infrastructure.

- Ground-floor opportunity to shape a multi-year cloud transformation you're making the architecture calls, not inheriting someone else's
- Modern stack, zero legacy baggage: Java 21, Python, Kafka, Kubernetes and AWS serverless, building event-driven systems from the ground up
- Perm salary up to $190k + Bonus + Super, with real runway to grow as the platform scales

Join a growing engineering team inside a major Australian financial services organisation, building the next generation of cloud-native systems that sit at the heart of how transactions are processed at scale. This isn't a maintenance role on ageing infrastructure — it's a ground-up rebuild, replacing legacy on-premise .NET systems with modern, event-driven Java services running natively in the cloud.

This team owns the design and delivery of new microservices and serverless capabilities that will underpin core business‑critical functions for years to come. Instead of patching what exists, engineers here are making the architecture decisions that will define how this platform runs for the next decade — a genuine golden‑window opportunity to shape a transformation program at one of the country's most important financial institutions.

The environment is fully cloud-native,



built on Java 21, Python, Kafka, Kubernetes and AWS (Lambda, ECS), delivering high‑throughput, event‑driven distributed systems that need to be resilient, observable, and built to scale. You'll work across the full lifecycle — from design and architecture through to build, testing, and production support — with real ownership over how problems get solved, not just how tickets get closed.

What we are looking for:

- Strong hands-on Java experience (Java 21 highly regarded), with working knowledge of Python
- Experience designing and building microservices and serverless functions (AWS Lambda) from the ground up
- Solid understanding of event-driven architecture, ideally with Kafka
- Working knowledge of Kubernetes, containers, and CI/CD pipelines
- Strong SQL skills and the ability to reason about data at scale
- A genuine design and architecture mindset — someone who can take a business problem and turn it into a system design, then bring others along with the idea
- Domain exposure to banking, payments, or other transaction‑critical financial services environments is highly regarded but not essential

You're not expected to tick every box here. What matters most is solid Java fundamentals, a design‑first mindset, and the appetite to build something new inside a business going through real transformation.

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📌 Senior Software Engineer - AI Transformation using Java (Sydney)
🏢 Preacta Recruitment
📍 Sydney