Staff Software Engineer - eCommerce Payments

About the role

CommBank is building the future of digital commerce for Australian businesses after acquiring a leading payment service provider. As a Staff Software Engineer you will join a core engineering squad in the Payments & Acceptance domain, which has more than 60 engineers and covers merchant onboarding, payment processing, settlement and reconciliation, and customer-facing merchant experiences. You will help shape the architecture, engineering standards and technical direction of a platform being transformed from legacy vendor solutions to modern cloud-native services.

Key responsibilities

• Lead the design and delivery of scalable, resilient and secure software solutions across the eCommerce payments platform.
• Build and evolve Java-based microservices supporting merchant onboarding, payment processing and settlement.
• Contribute across the stack, from backend services and APIs through to cloud infrastructure and customer experiences.
• Drive architectural decisions and influence engineering direction across squads.
• Champion engineering excellence through automated testing, CI/CD, observability and DevSecOps.
• Partner with product, architecture and business stakeholders to deliver customer outcomes.
• Mentor engineers and support production systems, improving reliability, performance and operational excellence.

Required profile

• Deep software engineering expertise and comfort leading complex technical initiatives while staying hands-on.
• Proven experience designing and delivering complex distributed systems at scale.
• Strong hands-on engineering capability and architectural and systems design skills.
• A track record of mentoring engineers and influencing technical decisions.
• Excellent stakeholder management and communication skills, balancing strategy with delivery.

Required skills

• Preferred: Java, Spring Boot, RESTful APIs, microservices, event-driven systems, DDD, AWS, Kubernetes, Docker, Terraform or CloudFormation, CI/CD pipelines, automated testing, observability, DevSecOps, Agile, React, TypeScript, Node.js, Next.js.
• Preferred: exposure to AI-powered development or operational tooling and interest in applying AI to engineering and security.