Senior Software Engineer

2 days ago

Sydney, New South Wales, Australia Kit Full time $120,000 - $180,000 per year

Introducing Kit

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

We are a diverse team of product managers, designers, marketers, engineers, risk managers and customer service gurus. And we're working together to deliver the 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.

The Role

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

You'll design and implement services and APIs that power our mobile app (which you'll also get a chance to work on) and internal tools, with a focus on performance, security, and maintainability. You'll work closely with fellow engineers, product managers, and designers to ship features that directly impact our customers - kids and their families.

This role is ideal for someone who loves backend development, thrives in cloud-native environments, and wants to contribute to a product with real social impact.

Our stack includes:

  • TypeScript-based
    serverless functions running in
    Azure
  • Hasura
    for GraphQL APIs and data access
  • PostgreSQL
    for data storage
  • React
    for internal portals (supporting teams using your APIs)
  • Flutter
    for our customer-facing mobile app

What You'll Do

Design and Build Scalable Systems

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

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