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Senior Full Stack Engineer - Agent Runtime & Platform

NinjaTech AISydney, New South Wales🇦🇺Australia

Why this role stands out

Step into a pivotal role at NinjaTech AI where you will build the core infrastructure powering next-generation agent runtimes and enjoy significant influence over the platform's architectural direction. This position is perfect for a pragmatic engineer who thrives on solving complex scaling challenges and wants to sharpen their expertise in container orchestration and high-impact distributed systems. Apply today to shape the future of AI infrastructure alongside a world-class technical team.

Quick overview

SeniorityMid Senior
Employment typeFull Time
Work modeOn Site
LocationSydney, New South Wales, Australia
AWSCDKPython

Job description

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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