Senior Platform Engineer

Job Description

Senior Platform Engineer

$180k + super

Sydney, Hybrid 2 days WFH

Tired of building SaaS platforms for moving money around or that makes people buy more stuff?

This role change's change that.

You’ll help build internal platforms that support AI, sensor fusion, and autonomous systems used by defence, law enforcement, and critical infrastructure teams across the world.

The kind of software that saves lives. Literally.

This isn’t a generic DevOps gig. You’ll be embedded in a high-trust Platforms team focused on enablement, automating the painful stuff, building scalable workflows, and helping engineers ship faster and safer, including into airgapped environments.

You won’t be stuck chasing incidents or firefighting prod. You’ll be building systems that other teams rely on, and improving developer experience in a way that has real-world consequences.

You’ll get your hands dirty with :

• Terraform and infra-as-code
• CI / CD across highly secure environments
• Containerisation and orchestration
• Network-level complexity you won’t see in most startups

You’ll have input into tooling choices and engineering direction, while being supported by experienced Principal Engineers who’ve built world-class platforms before. If you’re curious, humble, and eager to grow, this is the team you want around you.

The bar is high, the mission is real, and the problems are unlike anything else in the country.

They’re well funded ($250m raised last year), scaling fast, and solving problems that can’t be Googled.

This isn’t about optimising ad impressions or checkout flows.

It’s about building systems that matter, in a place where your work is trusted, valued, and seen.

Curious? Let’s have a chat. No CV needed for now.

📧 Julien@theonset.com.au | 📞 0406 158 832