A contemporary novel about a lonely hacker

A bit stereotypical, I know.

You know Elliott from Mr. Robot? Or even Aiden from Watch Dogs? I'd like to read something with a protagonist like that (i know they're different), someone lonely going through some thrilling story while trying to connect with someone else idk. With the hacking component. The only other hacker I've ever read about was Lizbeth Salander, and i loved her too.

Thank you