Questions, answers and coding jobs: StackOverflow and Coderwall

Coderwall is a site where you share your knowledge through protips and can see who is hiring coders or advertise employment roles in your own team, whereas StackOverflow is a place to ask questions and post answers to coding questions asked by others. There is a career side to StackOverflow but the connection between coding teams and individuals is clearer on Coderwall. It shouldn't, however, be a question of using one or the other for knowledge or employment since both will be useful to you as a coder.