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Senior Full Stack Engineer - Agent Runtime & Platform

NinjaTech AI Inc.Sydney, New South Wales🇦🇺AustraliaPosted 29 Aug 2026

Quick Overview

Seniority
Mid Senior
Employment type
Full Time
Work mode
Hybrid
Location
Sydney, New South Wales, Australia
AWSCDKPython

Job Description

Senior Full Stack Engineer - Agent Runtime & Platform Location

Sydney, NSW, Australia

Employment Type

Full time

Department 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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