Senior Software Engineer

Senior Software Engineer

Let's introduce ourselves. We're a venture-scaler powered by CommBank. That means we build, buy, and invest in startups that could benefit the bank's 15 million customers and beyond.

Because of what we do, we're really neither corporate, nor startup – instead we're happily navigating the space between both worlds. We're close enough to benefit from the bank's strategy, scale, and stability, but separate enough that we have the autonomy to try new things.

Where do you fit? We are looking for a Senior Software Engineer with knowledge and a broad range of concepts, technology, and domain insights to develop and deliver world-class software solutions.

You will be primarily responsible for building software and providing technical tooling and advice that allows our ventures to operate safely at speed within a regulated environment. You should be comfortable communicating and working with a wide range of roles across the ventures.

Along with software engineering, there is an expectation you can help establish and evolve the technology policies and procedures that help run our portfolio of ventures safely.

In this role, you will:

• Design, develop, and maintain scalable web applications using React, Node.js, and TypeScript
• Partner with product, design, and QA to ship high-quality features that solve real user problems
• Participate in code reviews, technical planning, and architecture discussions
• Contribute to and uphold engineering best practices around code quality, testing, CI/CD, and observability
• Lead by example in identifying and resolving technical debt, improving performance, and increasing system reliability
• Mentor and support junior and mid-level engineers
• Own features from discovery through to delivery and ongoing support
• Champion engineering excellence by advocating for best practices, including code quality, testing, observability, and documentation across broader engineering community

We are interested to hear from people who have experience in:

• 5+ years of programming and software development experience. Experience and comfort in Typescript and Node.
• Proven experience building modern front-end experiences using modern web technologies such as Next/Remix, React etc.
• Familiarity with relational databases (e.g., PostgreSQL) and use of ORMs (e.g., Prisma or TypeORM)
• Solid experience writing automated tests and working with testing tools like Jest, React Testing Library, and Playwright
• Comfortable working in cloud-based environments (e.g., AWS, Azure) and using tools like Docker, GitHub Actions, or similar for CI/CD
• Experience in designing UX + UI is preferred
• A good knowledge of web security and its application experience implementing practices in web applications.
• Demonstrated ability to take ownership beyond functional requirements—ensuring system stability, resilience, and tech quality

What's in it for you?

Joining x15 gives you access to opportunities you won't find in standalone corporate or startup roles. You'd be joining a team of experts, united by a love of finding solutions and making an impact. That means considerable diversity in your day-to-day. In what other role would you get to work with early-stage startups, more mature ventures, and Australia's leading bank, in an environment that encourages fresh ideas and innovation?

• Generous perks - Including staff discounts on a variety of brands & financial products
• Flexibility - our community makes their career fit their lifestyle
• Opportunity to thrive in the space between – Access to a space between corporate and startup, where our people explore, innovate and create without fear.
• A diverse community - Access to a brilliant network of talented humans who live and champion our values and do things a little differently- the x15 way.
• We value a diverse range of backgrounds and ideas and know this is fundamental for our future success.
• Access to broad engineering community and potential to work within different ventures and the bank in the future