Senior AI Engineer: Intelligence & Protection (Hybrid)

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

Job summary

Westpac Bank's AI Services unit seeks a Senior AI Engineer to own complex intelligence and protection workstreams, building production-ready products across governed data, APIs, AI workflows and human review experiences.

You will contribute to Financial Crime Prevention initiatives (Fraud, AML) and ensure traceability, safety and human authority in all decisions. Hybrid Sydney/Melbourne based with strong delivery ownership.

Qualifications

• Strong full-stack engineering across backend services, APIs, data stores and modern web apps using Go or Python, SQL, TypeScript, React and Next.js.
• Strong API, event and data-contract design including identity, entitlements, durable state, audit and recovery.
• Data engineering expertise covering lineage, quality, event time, knowledge time, corrections and purpose-based access.
• Practical graph and investigation engineering across entity resolution, typed relationships, bounded traversal and evidence paths.
• Strong AI service engineering across ML signals, LLMs, RAG, agents, evaluation, monitoring, controls and safe fallbacks.
• Domain experience has featured fraud and financial crime protection.
• Strong judgement about when rules, SQL, conventional ML, graphs or generative AI are the right solution.

Responsibilities

• Own detailed design, implementation, verification, release and operational readiness for a complex workstream.
• Build reliable contracts connecting source data, events, services, models, agents, user journeys and downstream systems.
• Maintain traceable evidence across entities, facts, signals and review outcomes.
• Ensure missing, stale, denied, incomplete and unavailable information is represented correctly.
• Implement agent boundaries using typed inputs, approved tools, access checks, limits, citations, audit and safe failure.
• Protect sensitive data through least privilege, minimisation, pseudonymisation and controlled disclosure.
• Own versioning, deployment, rollback, recovery, diagnostics, incident support and continuous improvement.

Skills

Go

Python

SQL

TypeScript

React

Next.js

API design

Data contracts

AI service engineering

Fraud/financial crime

Job description

Westpac Bank's AI Services unit seeks a Senior AI Engineer to own complex intelligence and protection workstreams, building production-ready products across governed data, APIs, AI workflows and human review experiences.

You will contribute to Financial Crime Prevention initiatives (Fraud, AML) and ensure traceability, safety and human authority in all decisions. Hybrid Sydney/Melbourne based with strong delivery ownership.