Principal Software Engineer – .NET/Python, AI

Commonwealth Bank

. Own engineering for Risk AI Platform services .

Posted 9/24/2026full-timeSydney • AustraliaLeadWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates deep expertise in .NET and Python for building and operating scalable microservices and APIs, with a strong focus on CI/CD practices and observability tools. Capable of leading engineering efforts in AI-driven risk platforms while ensuring compliance and secure coding standards.

Highest-signal resume keywords

Deep Software Engineering Expertise in .NETProduction Microservices and API DevelopmentAWS Cloud Experience with EKS and KubernetesCI/CD and GitOps with GitHub Actions and ArgoCDExperience with Grafana and Prometheus

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Applicant Tracking System Keywords

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Hard Skills

.NETPythonMicroservicesREST APIsFastAPIAWSKubernetesCI/CDGrafanaPrometheus

Soft Skills

LeadershipMentoringCuriosityLifelong LearningAbility to Work Through Ambiguity

Tools & Technologies

GitHub ActionsArgoCDDockerHelmKustomizePagerDutyS3KafkaCloudFormationELK

Industry Keywords

Risk AI PlatformTech ControlsPrivacy Front DoorSecure CodingOperational RiskComplianceObservabilityEvent StreamsModularisationAPI Contracts

Tech Stack

Tools & technologies

AWSCloudDockerDynamoDBEC2GrafanaJavaScriptKafkaKubernetesMicroservicesNext.jsNode.jsPrometheusPythonReact.NET

About the role

Key responsibilities & impact

Own engineering for Risk AI Platform services
Design, build, and operate .NET/Python microservices and REST APIs with OpenAPI specifications and Kong gateway integration
Scale platforms from MVP to enterprise-grade through architectural refactoring, modularisation, performance tuning, and reliability improvements
Write production code, conduct peer reviews, define engineering standards, and guide Staff and Senior engineers
Establish CI/CD golden paths using GitHub Actions and ArgoCD
Implement automated unit, integration, and performance testing and progressive delivery
Embed observability and operability using Grafana, Prometheus, PagerDuty, SLOs/SLIs, and production readiness reviews
Build and extend multi-agent architectures, conversational AI workflows, and Rules-as-Code frameworks
Apply LLM APIs/platforms, MCP, A2A, and planning/optimisation patterns
Partner with Product Owners, Data Scientists, Risk Technology, and platform teams to plan increments and deliver AI-driven capabilities
Ensure compliance with Tech Controls and Privacy Front Door processes
Champion secure coding, secrets management, SSO/RBAC, SailPoint, and encryption
Consume producer-led S3/Iceberg and Kafka data products and event streams
Provide technical direction for AI-enabled risk platforms across Operational Risk & Compliance

Requirements

What you’ll need

Deep software engineering expertise in .NET and/or Python
Track record of building and operating production microservices and APIs at scale
Experience with FastAPI and REST/OpenAPI contract design highly valued
Experience with agent orchestration frameworks, LLM gateway/proxy patterns, prompt engineering, and AI evaluation/observability tooling
Experience with React, Next.js, and Node.js
Strong AWS cloud experience with EKS, Kubernetes, DynamoDB, S3, CloudFormation, ALB, and EC2
Experience designing for high availability across multiple availability zones
Hands-on CI/CD and GitOps experience with GitHub Actions, ArgoCD, Docker, Helm/Kustomize, and automated testing
Experience with Grafana, Prometheus, CloudWatch, ELK/Obstack, SLOs/SLIs, production readiness reviews, and PagerDuty
Familiarity with PingSSO/OIDC, SailPoint RBAC, AWS Secrets Manager, and secure coding in regulated environments
Experience with Kafka, S3/Iceberg, and DynamoDB as a consumer of producer-led data products
Strong architectural thinking, including modularisation, API contracts, and integration patterns
Ability to lead without authority through code reviews, mentoring, and engineering standards
Curiosity, lifelong learning, and ability to work through ambiguity
Experience scaling systems from early-stage to enterprise

Benefits

Comp & perks

Accessible, inclusive and respectful workplace
Support or workplace adjustments available
Inclusive hiring commitment to people of all backgrounds
Career development support for existing Commonwealth Bank Group employees
Accessibility support via HR Direct