Preferred way of contact

email_32_icon e-mail: piotr@wittchen.biz.pl

Others

GitHub-Mark-32px github: github.com/pwittchen
stackoverflow_32_icon stack overflow: stackoverflow.com/users/1150795/piotr-wittchen
linkedin_32_icon linkedin: pl.linkedin.com/in/piotrwittchen/
1440361403_36-android google play: play.google.com/store/apps/developer?id=Piotr Wittchen
speaker-deck-32 speaker deck: speakerdeck.com/pwittchen
twitter_32_icon twitter: twitter.com/piotr_wittchen