Principal Software Engineer

Organization: At CommBank, we never lose sight of the role we play in other people?s financial wellbeing. Our focus is to help people and businesses move forward to progress. To make the right financial decisions and achieve their dreams, targets and aspirations. Each of us globally is dedicated to offering outstanding service, excellent advice and intuitive solutions to help our customers manage their finances in the ways they want to. Regardless of where you work within our organisation, your initiative, talent, ideas and energy all contribute to the impact that we can make with our work. Together we can achieve great things. Job Title: Principal Software Engineer Location: Bangalore- Manyata Tech park Business & Team: Retail Technology is responsible for the world leading application of technology and operations across every aspect of CommBank, from innovative product platforms for our customers to essential tools within our business. We also use technology to drive efficient and timely processing, an essential component of great customer service. CommBank is recognized as leading the industry in IT and operations with its world-class platforms and processes, agile IT infrastructure, and innovation in everything from payments to internet banking and mobile apps. The Retail Technology team is responsible for technology leadership and capability underpinning CommBank?s retail business. You will be joining Retail Technology which is responsible for building and supporting the application used by our end customers. The goal of RT is to provide applications underpinned and enabled by world-class people, process and technology. Impact & Contribution: To drive excellence, quality and performance in the delivery of efficient, reliable and maintainable application and solutions that meet design and requirements specifications for technology projects. Principal Software Engineers play a significant mentoring role in providing design and technical leadership to other members of the engineering team. Roles & Responsibilities: Design AWS solutions for new features and platform work; own the target architecture and docs. Lead the move from on?prem and Azure to AWS with safe, staged cutovers. Redesign and standardize our experience-layer APIs for web and mobile. Guide delivery of payments features (PayID, BSB) that are reliable, secure, and auditable. Improve reliability: set SLOs, strengthen observability (logs/metrics/traces), and lead incident response. Build and standardize CI/CD, Infrastructure as Code, and Kubernetes/GitOps; improve developer workflows. Set up secure cloud networking and access (multi-account, VPCs, IAM, KMS, Direct Connect/VPN). Support teams day-to-day: triage issues, fix root causes, and unblock delivery. Coach engineers; run design reviews; promote best practices and reusable patterns. Work with Product, Security, and Ops to make clear, pragmatic trade-offs and align roadmaps. Essential Skills: Experience: 12+ years of industry experience on Familiarity with Developing applications using C# and ASP .NET Core Payments/fintech domain experience (NPP/Osko, PayID, BSB/BECS, ISO 20022) Observability stack: OpenTelemetry, Prometheus, Grafana, Datadog/New Relic Deep experience designing and operating systems on AWS at scale (multi-account, VPC, EKS/ECS, RDS/DynamoDB, S3, KMS, IAM, CloudWatch) Strong backend engineering in C# ; expertise with API design (REST/gRPC), event-driven architecture, and Kafka Production Kubernetes and containerization experience (Docker, EKS, Helm; ArgoCD or Flux is a plus) Proven leadership of complex migrations (on?prem/Azure to AWS) with zero/minimal downtime strategies Hands-on CI/CD and IaC experience (GitHub Actions/GitLab/Azure DevOps; Terraform/CDK/CloudFormation) Practical SRE experience: SLOs/SLIs, error budgets, alerting, runbooks, incident command Solid security and networking fundamentals: IAM, encryption, VPC design, DNS, load balancers, TLS, WAF Strong coaching and cross-functional communication skills; able to influence without authority Education Qualifications: Bachelor?s degree in engineering in Computer Science/Information Technology. If you're already part of the Commonwealth Bank Group (including Bankwest, x15ventures), you'll need to apply through Sidekick to submit a valid application. We?re keen to support you with the next step in your career. We're aware of some accessibility issues on this site, particularly for screen reader users. We want to make finding your dream job as easy as possible, so if you require additional support please contact HR Direct on 1800 989 696. Advertising End Date: 29/11/2025