What's your UI framework? This question is difficult to answer without knowing that. In general it sounds like you're working too hard to introduce a strict pr

What's your UI framework? This question is difficult to answer without knowing that. In general it sounds like you're working too hard to introduce a strict process separation between the UI and the backend. A desktop application won't have multiple clients connecting to the backend, so you can run everything in one process. That's the use case for which SQLite is designed. Your UI framework may introduce some level of process separation anyway: if the UI is a WebView or Electron, then it's going to run the renderer in its own process. So there's no need to go crazy with splitting up into tiny little services.