Open source developer - author of various tools and libraries for .NETI build things. The most visible thing unrelated to any employer is probably protobuf-net (I also host online tools for working with protobuf); I also work on things like Dapper and StackExchange.Redis (although these are also intertwined with my work for Stack Overflow.) I also blog - usually talking about the .NET stack and performance / scale issues. And I occasionally (!) help folks with questions on Stack Overflow. If I've helped you and you want to buy me a coffee: I won't stop you! If I don't drink it as caffeine, I'll probably put it towards ongoing development / tooling / hardware costs to help me build more and better things.