Senior Application Engineer (C#)

Sydney, New South Wales, Australia | Engineering | Full-time


Quantium are continuing to hire with all interviewing and on-boarding done virtually due to COVID-19. We look forward to meeting you in person when our offices re-open and it is safe to do so.

Founded in 2002, Quantium combines the best of human and artificial intelligence to power possibilities for individuals, organisations and society. Our solutions make sense of what has happened and what will, could or should be done to re-shape industries and societies around the needs of the people they serve. 

Our opportunity

We're expanding our multi-tenanted Decision support platform, used by thousands of users daily to make data-driven decisions. You'll play a key role in solution design and development as we onboard more datasets and use cases.

Working as part of a cohesive and collaborative cross-functional team, you’ll be rubbing elbows (because social distancing of course!) with product managers, UX/UI designers, analysts, testers and fellow engineers. You’ll make a positive contribution as an expert in your field who is excited by the idea of working across our stack and growing your "T" shape. 

Whilst writing well-tested code day to day may be a given, here are a few other ways you’ll contribute at Quantium:


  • influencing what we build and how we build it,
  • building up the back-end skill of the team, and in turn picking up other areas of our stack,
  • participating in our agile ceremonies,
  • performing code reviews,
  • wrangling CI, CD, and local development to "sharpen the saw",
  • contributing to core services and libraries,
  • supporting our customer engagement team, and keeping our production environment humming

From a stack perspective, we maintain a React Single Page Application (SPA) written in TypeScript, backed by C# .NET Core services, querying multi-tens-of-billion-row datasets in CosmosDB and Snowflake, populated by Scala and Spark. There's ample problems for you to solve at every layer of our stack.

We've adopted Kubernetes for orchestrating our core services and products, with a gitops model driving builds, configuration and deployment.


Our new team member

Here are a few things we are looking for you to bring to the team:

  • Well versed in designing, building, and maintaining web services in a typed Object Oriented language. There will be APIs you've written in production right now, and you'll have stories to tell of how you dealt with scale and adoption
  • Familiarity with RESTful API design and microservices, and can explain the pros and cons of both
  • Strong grasp of concurrency and asynchronous communication patterns and with a working knowledge of data structures. Data is our lifeblood, so it would be fantastic if you brought some SQL and schema modelling skills to the table too (but no pressure if you can’t)
  • Feel comfortable advocating for your ideas and enjoy assessing others ideas to determine the best way forward
  • Must have a passion for mentoring others, as well as setting goals for your own learning and development – we’re all about growth

More about Quantium

We are passionate about creating opportunities for ourselves and each other. You will have access to relevant, meaningful, and actionable learning. We are growing our technical, professional, and leadership capabilities through our robust internal learning curriculum, team knowledge-sharing sessions, and our mentoring program.

We also believe there is more to a successful career than just hard work and recognise the need to balance personal and family commitments with work. We enjoy weekly group fitness sessions (being done virtually at the moment), team sports (we are looking forward to these starting again), and well-being resources.

Quantium are an equal opportunity employer and values diversity. We are a multicultural team of various beliefs, sexual orientations, and gender identities. We celebrate our diversity of race, religion, colour, national origin, gender, sexual orientation, age, marital status, and disability status.