Open to opportunities

Rian Mostert

@rianmostert

Senior full-stack .NET developer who leads teams to modernize cloud systems and deliver high-quality software end-to-end.

United Kingdom

Message

What I'm looking for

I’m looking to keep building and modernizing full-stack .NET systems in the cloud, while leading engineers through solid engineering practices. I want a team where I can coach, ship high-quality features, and continuously improve architecture.

I’m a senior full-stack .NET developer and technical lead with 10+ years of experience consulting and collaborating with businesses from startups to large enterprises. I own the full project life cycle—from ideation to release and beyond—and take pride in delivering high-quality code on time.

Most recently, I helped build a new greenfield product, Flexify, as an integration mechanism for import/export/sync across flexibility markets, then moved into Electron’s primary API to modernize and improve it. That included implementing rate limiting, migrating Azure deployments to AWS, and breaking parts of the API into an event-driven design using a transactional outbox pattern. I’ve also led teams at Monitor IS and Warc/Ascential—where I promoted from Tech Lead to Development Manager—driving backend and web platform development with strong engineering practices, and rebuilding systems for optimal cloud operation.

Experience

Work history, roles, and key accomplishments

ASP .NET Fullstack Developer

Chelsea Apps Factory

Jun 2017 - Aug 2017 (2 months)

Built a Web API and Xamarin application to deliver a single centralised app that integrated multiple client services. Implemented API interactions between the Xamarin app and external systems including hot desk, meeting rooms, and ServiceNow.

C++Web APIs Xamarin API Integration ServiceNow Integration Hot Desk Integration