I use .Net & C# for backend development and Vue or Blazor for Frontend.
.Net has great tooling that won't get in your way as you work on the project.
C# has added lots of great features and is blazing fast nowadays with every .Net release being accompanied by a massive blog post describing all the performance improvements to the runtime[1].
[1] https://devblogs.microsoft.com/dotnet/performance-improvemen...