Staff Full-Stack Engineer — Secure Auth & Scalable APIs

Commonwealth Bank; Sydney; On-site; AUD 190,000 - 230,000; Full time

Job summary

Commonwealth Bank is looking for a Staff Software Engineer in Sydney to own secure, scalable authentication experiences across digital channels. You will work on end‑to‑end solutions spanning web apps and BFF services, shaping architecture and engineering practices for login, multi‑factor authentication, and identity integration.

You’ll contribute to cloud‑native services, champion clean code, automated testing, observability, and CI/CD, while mentoring engineers and influencing technical

Qualifications

• Strong full‑stack engineering capability with end‑to‑end ownership.
• Deep experience with Node.js and JavaScript/TypeScript, backend or BFF design.
• Experience with React and Next.js, REST APIs, GraphQL/Apollo.

Responsibilities

• Design and deliver end‑to‑end authentication solutions spanning React/Next.js experiences and Node.js BFF services.
• Shape scalable BFF and API architecture using REST and GraphQL.
• Translate high‑level requirements into thoughtful system designs and produc­tion‑ready solutions.
• Design for secure token management, sessions, authentication state and identity integration.
• Build cloud‑native services with resilient patterns and emphasize testability, observability, CI/CD and production reliability.
• Collaborate across teams to create reusable integration patterns and mentor engineers.

Job description

Commonwealth Bank is looking for a Staff Software Engineer in Sydney to own secure, scalable authentication experiences across digital channels. You will work on end‑to‑end solutions spanning web apps and BFF services, shaping architecture and engineering practices for login, multi‑factor authentication, and identity integration.

You’ll contribute to cloud‑native services, champion clean code, automated testing, observability, and CI/CD, while mentoring engineers and influencing technical