Senior Platform Engineer – Agent Runtime & Orchestration

NinjaTech AI; Sydney; Hybrid; AUD 140,000 - 200,000; Full time

Job summary

NinjaTech AI is seeking a backend platform engineer in Sydney to own the agent sandbox runtime and related platform services. You will manage provisioning, isolation, scheduling, and cost per task at scale, while building the instrumentation and tools that keep the system observable and reliable.

The role emphasizes Python proficiency, AWS CDK and container orchestration expertise, with a pragmatic approach to design and implementation for scalable growth.

Qualifications

• 5+ years building and operating production backend systems and platforms.
• Strong AWS CDK and container orchestration understanding.
• Python strength with frontend basics for internal tooling.
• Bias for simplicity over architecture for its own sake.

Responsibilities

• 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.

Skills

Backend systems

AWS CDK

Container orchestration

Python

Frontend basics

Tools

AWS CDK

Job description

NinjaTech AI is seeking a backend platform engineer in Sydney to own the agent sandbox runtime and related platform services. You will manage provisioning, isolation, scheduling, and cost per task at scale, while building the instrumentation and tools that keep the system observable and reliable.

The role emphasizes Python proficiency, AWS CDK and container orchestration expertise, with a pragmatic approach to design and implementation for scalable growth.