Senior Full Stack Engineer - Agent Runtime & Platform
Sydney
- Full-time
- On-site/hybrid
Every agent task runs somewhere: a sandboxed container with a filesystem, a browser, tools and a time limit. This role owns that runtime and the platform services around it — the layer everything else in the product depends on.
What you'll do
- Own the agent sandbox runtime: provisioning, isolation, scheduling, lifecycle and cost per task at scale.
- Build and own platform services — identity plumbing, secrets, metering, object storage, workflow orchestration, and the tool/connector abstraction layer.
- Drive the observability stack from instrumentation through ingestion to the dashboard people actually open during an incident.
- Harden infrastructure against the failure modes that surface to users as "the agent got stuck", and keep the platform from becoming a bottleneck to growth.
What we're looking for
- 5+ years building and operating production backend systems and platforms.
- Deep AWS (we are CDK-first) and container orchestration understanding below the level of configuration — schedulers, runtimes and isolation boundaries.
- Python strength, plus enough front end to build the internal tooling your platform needs rather than waiting for someone else.
- A bias for simplicity and pragmatism over architecture for its own sake.
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Senior Full Stack Engineer - Agent Runtime & Platform in Sydney employer: NinjaTech AI
NinjaTech AI is an exceptional employer that fosters a dynamic and innovative work culture in the heart of Sydney. With a strong emphasis on employee growth, you will have the opportunity to work on cutting-edge technology while collaborating with a talented team that values creativity and adaptability. Enjoy the benefits of a hybrid work model, competitive remuneration, and a supportive environment that encourages continuous learning and development.
