NinjaTech AI
Posted 1w ago

Senior Full Stack Engineer - Agent Runtime & Platform

NinjaTech AI
Sydney, New South Wales, Australia
HybridFull Time
Responsibilities
  • owning runtimes
  • building services
  • driving observability
Requirements
  • Requires 5+ years building and operating production backend systems and platforms
  • Deep AWS and container orchestration knowledge
  • Python expertise, and enough front-end skill for internal tooling
Technical tools mentioned
AWSAWS CDKPython

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.

About NinjaTech AI

Developing autonomous AI agents for complex professional task automation.

Year founded
2022
Employees
37
Organization type
Private
Latest investment
Raised $2.00M Seed (2025) — led by Amazon Alexa Fund, Samsung Ventures, SRI Ventures
Headquarters
US

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