On the flip side If you want to be a .net core expert in a larger team on a longer project then you'll have to dedicate more time to the backend and getting familiar with the various design patters, the trick is to prove it to whoever is interviewing. Majority of the time you'll need good team work, GIT, communication, clean coding practices and then some generalised programming concepts followed up by deeper understanding of the language. Ideally you go through books and sample projects and then work your way up to open source projects where you can demonstrate good track record of git, code, commit and commenting.