Principal Software Engineer AI-Powered Scalable Microservices

Commonwealth Bank; Sydney; On-site; AUD 210,000 - 260,000; Full time

Job summary

Commonwealth Bank, Australia, is seeking a Principal Software Engineer within the Banker Assisted Lending crew to lead the design and delivery of scalable, secure software modernising business lending. You will shape engineering direction, stay close to code, and solve complex problems with AI‑powered engineering practices.

You will decompose monolithic apps, set architecture, translate requirements into outcomes, and mentor teams while influencing cross‑functional decisions.

Qualifications

• Senior software engineer with a track record of leading large‑scale engineering initiatives and solving complex technical challenges.
• Strong architectural judgement combined with hands‑on engineering capability and passion for modern engineering practices including AI‑assisted development.
• Experience adopting AI‑assisted engineering tools and practices.
• Ability to communicate effectively with both technical and non‑technical stakeholders.

Responsibilities

• Lead the decomposition of monolithic applications and the development of scalable microservices and event‑driven solutions.
• Set architectural direction and resolve complex technical challenges from early design through to production.
• Translate business and technical requirements into clear engineering outcomes, reusable solutions and pragmatic delivery plans.
• Make balanced decisions about technical debt, architecture, risk and commercial priorities.
• Contribute directly to code, lead technical reviews, and resolve complex production issues.
• Influence technical decisions across engineering, product and other cross‑functional teams.
• Mentor engineers, strengthen technical capability and contribute to attracting and developing engineering talent.
• Champion AI‑powered engineering practices that improve the software development lifecycle and engineering experience.

Skills

Architectural leadership

Hands-on coding

Cross-functional collaboration

Mentorship

AI‑assisted engineering

Tools

AWS

Kafka

EventBridge

SQS/SNS

GitHub Actions

Terraform

Claude Code

Codex

Cursor

Harness Engineering

Job description

Commonwealth Bank, Australia, is seeking a Principal Software Engineer within the Banker Assisted Lending crew to lead the design and delivery of scalable, secure software modernising business lending. You will shape engineering direction, stay close to code, and solve complex problems with AI‑powered engineering practices.

You will decompose monolithic apps, set architecture, translate requirements into outcomes, and mentor teams while influencing cross‑functional decisions.