Ask HN: What are good sources for handling app backends, APIs, etc?

I have an idea for an app, and I am pretty comfy with the client. As for the Backend/API side I am shooting mental blanks. Please give me some resources or some places I should look to get started. I am interested in the following things.<p>-Scaling Infrastructure( and those that have many workers in the background handling transactions) - Datastore and data fetching - Geo-coding Technology - API Design - Backend Security - Pros and Cons of Self-Hosted vs using a service - Anything else I am missing.<p>I am a swift learner, and a begginner Programmer, but I am pretty tired of being in the dark and would like to zero in on my design and implementation. Thank you so much if you could help.