The most widely used architecture patterns in .NET development are:
Backend: Multi-tenancy, Microservices, Serverless, CQRS, Headless (Decoupled), and DDD.
Frontend: MVC, Micro-frontends, MVVM, PWA, Reactive, and SPA.
You can choose the best solution for your project after considering the project requirements. It would be nice to discuss this with STS Software GmbH. Our experienced .NET developers will learn your needs and help you choose the most suitable patterns.