As a tech recruiter, I'm asked a lot about the best websites and resources for finding jobs online, so here's a short list of sites:
General career/job search advice:
Coding interview prep:
Code Wars
Hacker Rank
Leet Code
Also, the book "Cracking the Coding Interview" (on Amazon) is very good. I have no affiliation with this product but I've heard nothing but good things from engineers who have used it to prepare for interviews.
Job boards:
Hired.com
Dice.com
Angel.co
24 top tech job boards
Top comments (1)
The sites of Coding interview prep are nice.