If you're looking for background music for doing concentrated work like programming look for video game soundtracks. They're amazing!

My recent favorite in this realm is the soundtrack from slipways. It's a neat calm game and the music really adds to the atmosphere.

You can find the original soundtrack on YouTube, but I can also recommend checking out this bandcamp site for a better listening experience without ads. You can also pay the creator this way, which is a nice thing to do.