oneZero Financial Systems is a global software development company with offices in the USA, UK, Singapore and Australia. Our platform, deployed with over 200 financial entities worldwide, empowers banks, brokerages and hedge funds with cutting edge trading technology. It features a high performance trading environment with real-time integrations to some of the world's leading banks and financial institutions.

We are modernizing a core internal service to bring it into a new era as a web-based, customer-facing product; to achieve this, we are seeking a Senior Full-Stack .NET Developer who will help drive the improvement of the existing system and its features, as well as developing a new Web UI to provide client access. This is a senior-level role that requires deep expertise in backend development with C# and .NET, alongside solid frontend development experience with React and Redux, HTML, and CSS. You will collaborate with a cross-functional team to deliver seamless, reliable, and real-time user interfaces that enhance the user experience for financial applications.

oneZero earns 2025 Great Place To Work Australia Certification™ https://www.onezero.com/awards/onezero-earns-2025-great-place-to-work-australia-certification

oneZero is proud to have been named one of Business Intelligence Group's Best Places to Work 2024: https://www.onezero.com/homepage/onezero-2024-best-place-to-work-for-third-year/

The Boston Globe names oneZero a Top Place to Work for 2023: https://www.onezero.com/homepage/the-boston-globe-names-onezero-a-top-place-to-work-for-second-year-in-a-row/

Please see oneZero featured in e-Forex Magazine to learn more about the company and our dynamic team https://e-forex.net/?s=onezero

This role is a full-time position in the oneZero Canberra office. Applicants must be based in the Canberra region or be able to relocate.

Benefits Include

Bonus plan
Flexible workplace, including hybrid work from home a few days per week
Dedicated parking space
Free Uber Eats lunch provided daily in the office
Private Health Insurance
Monthly Wellness program subscription

Required Skills

5+ years of professional experience with C#, ASP.NET Core, and modern frontend technologies.
Proven track record in designing, developing, and deploying full-stack applications in a fast-paced, agile environment.
Strong expertise in React, Redux, and responsive design principles.
Strong knowledge of HTML5, CSS3, and pre-processors like LESS.
Experience designing and consuming REST APIs and working with OAuth 2.0 or other authentication/authorisation protocols.
Expertise in building scalable, maintainable, and performant systems.
Ability to work autonomously with minimal oversight while collaborating closely with the broader team.
High attention to detail and a commitment to delivering polished, production-ready code.
Excellent communication skills, with the ability to explain complex technical concepts clearly to both technical and non-technical stakeholders.