What if your APIs didn’t just connect systems — but unlocked the next era of customer experiences?

• Multiple contract opportunities
• Daily Rate: up to $1,050 including super
• Initial 6-12 months (potential to extend)
• 3 days in office - Sydney CBD

Join a fast-growing tech business where integration isn’t just plumbing — it’s a core part of the product. With millions of users, a high-performing engineering team, and a platform built for scale, this is a place where your code shapes how people interact with technology every day.

Backed by decades of success and operating in 30+ global markets, this company combines the speed of a product-led business with the security of a globally trusted brand.

They’re looking for Senior Integration Engineers to help power seamless, intelligent customer journeys through scalable APIs, resilient messaging systems, and event-driven architecture.

 What You’ll Do

• Design, build, and evolve robust RESTful APIs used by customer-facing and internal platforms
• Lead the technical implementation of integration layers that sit at the heart of multiple product ecosystems
• Use technologies like Spring Boot, Apache Camel, Kafka, PubSub, and more
• Ensure observability, security, and performance are built into every layer of your work
• Collaborate across engineering, product, and platform teams to deliver scalable, real-time connectivity
• Contribute to architecture discussions, code reviews, and continuous improvement

 What You Bring

• Deep experience in Java 8+ and Spring Boot 3+
• Proven ability to design and implement REST APIs and enterprise-grade integrations
• Strong knowledge of EIP (Enterprise Integration Patterns)
• Experience with integration frameworks (Apache Camel, Spring Integration)
• Messaging experience: JMS, Kafka, Solace, or GCP PubSub
• Familiarity with CI/CD tooling and automated testing
• Bonus: Hands-on with observability stacks like Splunk, SumoLogic, AppDynamics, Dynatrace

 Why You’ll Love It Here

• Join a high-performing, tech-focused culture that values quality and autonomy
• Solve real engineering challenges at scale with modern tooling
• Collaborate with some of the brightest engineers in the region, with a mix of product, start-up, and big-tech backgrounds
• Work with a leadership team that genuinely backs innovation, learning, and career growth

If you're a Senior Integration Engineer who’s excited to build future-proof systems in a product-driven environment — this is your opportunity to make a real impact.

Apply now or reach out for a confidential chat with Monica Omtha Monica@theonset.com.au