Senior Data & AI Systems Architect

Westpac Group; Sydney; Hybrid; AUD 180,000 - 240,000; Full time

Job summary

Westpac is seeking a Principal Engineer to drive technical leverage across Technology teams and shape architecture across squads. You will guide design decisions, prototype high‑risk ideas, and create reusable patterns to empower autonomous delivery while ensuring safety and reliability.

This hybrid role covers customer platforms, APIs, data products and cloud foundations, with mentoring and a focus on production readiness and sustainable engineering practices.

Qualifications

• Experience solving complex engineering problems spanning multiple services, platforms or squads.
• Broad knowledge of distributed systems, data, security and production operations.
• Strong design judgment across APIs, events and async workflows.

Responsibilities

• Identify material technical constraints and decisions across a complex area.
• Choose interaction and data patterns (REST, gRPC, events) based on evidence.
• Prototype or implement high-risk elements to validate feasibility and security.
• Create adoption paths for squads to move safely to target state.
• Lift engineering judgement through reviews, mentoring and incident learning.

Skills

Complex problem solving

Distributed systems

System design

Technical leadership

Communication

Tools

Git

CI/CD

Containers

Cloud services

Infrastructure as Code

Job description

Westpac is seeking a Principal Engineer to drive technical leverage across Technology teams and shape architecture across squads. You will guide design decisions, prototype high‑risk ideas, and create reusable patterns to empower autonomous delivery while ensuring safety and reliability.

This hybrid role covers customer platforms, APIs, data products and cloud foundations, with mentoring and a focus on production readiness and sustainable engineering practices.