Depends. If backend = writing controllers, some basic db interactions (querying, storing), and more or less writing modular code then I would say it's just like

Depends. If backend = writing controllers, some basic db interactions (querying, storing), and more or less writing modular code then I would say it's just like frontend. On the other side if backend also includes: handling more complex db interactions (your simple query does not work performant enough anymore when your table has more than N rows), sync/async communication between multiple services, splitting monolithic applications into decoupled services, going beyond the basic of SOLID, handle critical backend stuff like payments, checkouts... then I think backend is more difficult than frontend.