1. Look at places like Stack Exchange to see which sub-fields are getting a lot of questions.
2. Look at tech jobs listing sites and see what they're including on their nice to have / must have lists in their listings.
1. Look at places like Stack Exchange to see which sub-fields are getting a lot of questions.
2. Look at tech jobs listing sites and see what they're including on their nice to have / must have lists in their listings.