Email
LinkedIn
https://www.linkedin.com/pub/alek-kowalczyk/11/bb/806
TopTal
https://www.toptal.com/profiles/43977/resume/internal
Stackoverflow
https://careers.stackoverflow.com/alekkowalczyk http://stackoverflow.com/users/4316374/alek-kowalczyk
GitHub
https://github.com/alekkowalczyk
Tyba
http://tyba.com/alek-kowalczyk/