Principal Architect – C#/.NET Fintech (Sydney)

About the role

We are looking for a hands‑on Principal Architect to shape the next version of a complex C#/.NET fintech platform. Based in Sydney CBD, you will work directly in the engine room, influencing technical standards and guiding multiple squads.

Key responsibilities

• Define and enforce architecture standards across the backend.
• Lead high‑impact refactoring and improve API design.
• Guide domain modelling, service boundaries and micro‑service decomposition.
• Review code, write architecture decision records and coach technical leads.
• Collaborate with engineering teams to raise the overall quality of the codebase.

Required profile

• Proven experience as a Principal Architect, Principal Engineer, Staff Engineer or senior technical leader.
• Deep expertise in C# and the .NET ecosystem.
• Track record of delivering scalable, maintainable backend solutions.
• Ability to work hands‑on while influencing architectural direction.

Required skills

• C#
• .NET
• API design
• Domain modelling
• Backend architecture
• Refactoring
• Automated testing
• Code review

What we offer

• Competitive $250k total compensation package.
• Five‑day onsite work environment in Sydney CBD.
• Opportunity to shape a high‑growth fintech product from within.
• Collaborative team of smart engineers with strong technical ambition.