Senior Software Engineer

We’re Kit, built by CommBank -an earning-and-learning, mindfully-spending, money-mastering app and prepaid card for kids.

We areadiverse team ofproduct managers,designers,marketers, engineers, risk managers and customer service gurus. And we’reworkingtogether to deliverthe future of financial capability for young people living in Australia.

We're looking for smart people who think differently and want to create products that result in future generations of financially confident, capable and resilient citizens thriving in the new world of money.

What it’s like to work here

We’re a community of galvanisers, thinkers, and doers. We have a big, bold vision, which so far no-one has nailed (including us). That excites, rather than deters, us.

We never lose sight of the impact we can have on people’s lives, and the role that each of us plays in shaping the bank of the future. We don’t take ourselves too seriously and make time to connect to celebrate and grow our people.

At x15, we’re guided by three values: Care, courage, and commitment. And what does that mean? We’re aware, attuned, and always act to help our people and our customers. We’re more than just job titles and we don’t hide the human stuff. We lead with grit and grace and do what's right – even if it's hard. And, whatever happens, we always find a way.

The Role

We’re looking for a Senior Software Engineer to help build and scale Kit’s core backend systems.

What You’ll Do

Design and Build Scalable Systems

Develop, maintain, and optimise serverless backend services in Azure using TypeScript and Node.js.

Design and evolve GraphQL APIs with Hasura to support new product capabilities and ensure smooth integration across clients.

Manage data models and schema evolution in PostgreSQL, with attention to performance and scalability.

Implement robust observability, testing, and CI/CD practices to ensure reliable, maintainable deployments.

Collaborate and Deliver

Partner with product and design teams to translate customer needs into reliable backend solutions.

Contribute to technical discussions, architecture reviews, and system design decisions.

Work closely with frontend and mobile engineers to define clear API contracts and enable great customer experiences.

Elevate the Craft

Champion clean, maintainable code and high engineering standards.

Participate in code reviews, pair programming, and internal knowledge sharing.

Identify opportunities for technical and process improvements within the backend domain.

Experience and Skills

- Strong experience developing backend systems in TypeScript/Node.js, ideally within a serverless or microservice environment.

- Deep understanding of cloud-based architectures, with experience in Azure Functions or similar (AWS Lambda, Google Cloud Functions).

- Proficiency with GraphQL, particularly Hasura, and understanding of API design best practices.

- Experience with relational databases (PostgreSQL preferred) and data modelling.

- Familiarity with modern CI/CD pipelines, testing, and observability tools.

- Excellent collaboration and communication skills across technical and non-technical stakeholders.

- A continuous improvement mindset and passion for scalable, high-quality engineering.

Why Join Us?

- Enjoy a flexible and dynamic startup environment.

- We nurture a safe space for our people to show up as they are

- Competitive salary and bonus structure.

- Opportunities for professional growth and development.

- Access to the best in class benefits that CommBank offers.

Our stack includes

- TypeScript-based Node.js serverless functions running in Azure

- Hasura for GraphQL APIs and data access

- React for internal portals (supporting teams using your APIs)

About x15

We’re a venture scaler powered by CommBank. We build, buy and invest in startups that will benefit the bank's 15 million customers and beyond.

We're navigating the space between corporate and startup worlds and harnessing the collision of careers, ideas and expertise to help build and scale the next generation of digital businesses.

Want access to events, networking and job opportunities, early-stage beta programs, and more?

What is x15ventures?

We’re a venture scaler powered by CommBank. We build, buy and invest in startups that will benefit the bank's 15 million customers and beyond.

We're navigating the space between corporate and startup worlds and harnessing the collision of careers, ideas and expertise to help build and scale the next generation of digital businesses.

Want access to events, networking and job opportunities, early-stage beta programs, and more?

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