Senior Software Engineer, Cross-Platform Mobile (.NET MAUI)
Upstart 13Cambridge, Massachusetts, United States
Posted December 11, 2025
Full Time
About the Company
We put people first at Upstart 13! We believe the world is filled with amazing people and we are willing to go to great lengths to seek out others who share our values to join our cause of bringing down borders in technology for people everywhere.
Job Description
We are seeking a Senior Cross-Platform Mobile Engineer to lead our Xamarin.Forms to.NET MAUI migration and establish mobile engineering best practices. The role reports to the Director of Software and shapes our mobile architecture for iOS and Android platforms.
Requirements
- Implement Xamarin.Forms to.NET MAUI migration strategy
- Design scalable cross-platform applications using.NET MAUI, C#, XAML, and MVVM patterns
- Implement new functionalities using.NET MAUI technology
- Follow best practices from the Technical Lead and UI/UX
- Evaluate migration complexity, resolve breaking changes, and implement handler replacements for custom renderers
- Develop high-performance mobile applications for iOS and Android
- Integrate RESTful APIs, Azure services, and backend microservices
- Optimize performance, implement offline-first architecture, and manage local persistence (SQLite/EF Core)
- Handle app store submissions, release management, and production deployments
- Implement Unit Tests
- Conduct thorough code reviews, ensuring quality, test coverage, and adherence to standards
- Collaborate with product, design, and backend teams to deliver cohesive solutions
Benefits
- Fully remote
- USD competitive salary
- 20+ Paid time off days
