Principal Platform Architect for AI, Cloud & Scale

Commonwealth Bank; Melbourne; On-site; AUD 150,000 - 210,000; Full time

Job summary

Commonwealth Bank, EC Technology, is seeking a Principal Software Engineer to set engineering direction across a technology domain, not a single squad. You’ll shape architecture, platform investment and build-versus-reuse decisions to move teams toward shared, scalable capabilities.

This role operates in a highly regulated environment, defining patterns for resilience, security, observability and responsible AI while staying hands-on enough to turn strategic direction into practical engineering

Qualifications

• Strong computer-science foundations across algorithms, data structures, concurrency and distributed-system design.
• Experience owning technical outcomes across complete product or platform surfaces, with the judgement to move between breadth and depth.
• Experience designing and operating production services and APIs at scale using a modern typed language such as Python, Java, Kotlin or Go.
• Strong API, contract and integration-design capability, including experience with REST, OpenAPI, API gateways or equivalent technologies.

Responsibilities

• Own the domain’s technical strategy, including architecture direction, platform choices and build‑versus‑reuse decisions.
• Drive consolidation and decommissioning, reducing system and pipeline duplication while establishing reusable golden paths.
• Scale platforms from minimum viable products into resilient, highly available and enterprise‑ready services.
• Set engineering standards across continuous integration and delivery, testing, observability, operational readiness and security.
• Provide hands‑on technical leadership across the stack, guiding the development of scalable services, well‑designed APIs, backend‑for‑frontend layers and fit‑for‑purpose internal interfaces.
• Define reliable, observable and responsible approaches to AI and agentic systems, with appropriate human oversight.
• Embed regulatory, control, security and privacy considerations into engineering decisions from the outset.
• Mentor senior engineers and lift engineering capability through influence, technical leadership and hands‑on contribution.

Skills

Strong CS foundations

Full-stack software engineering

Influence teams without formal- 1?

Hands-on technical leadership

Production service design and operate

Tools

REST

OpenAPI

API gateways

React

TypeScript

Java

Python

Kotlin

Go

AWS

Kubernetes

Docker

GitHub Actions

ArgoCD

Job description

Commonwealth Bank, EC Technology, is seeking a Principal Software Engineer to set engineering direction across a technology domain, not a single squad. You’ll shape architecture, platform investment and build-versus-reuse decisions to move teams toward shared, scalable capabilities.

This role operates in a highly regulated environment, defining patterns for resilience, security, observability and responsible AI while staying hands-on enough to turn strategic direction into practical engineering