Christian Liebel is not only a developer but also a speaker, author, and teacher. Christian is well-known in the German developer community due to several talks, workshops, and hands-on sessions both at local user groups and large conferences, as well as his regular presence in major German developer magazines. Christian is a PWA enthusiast and thrilled by the opportunities opened up by modern web technologies. You can reach him directly via email (christian.liebel@thinktecture.com) or Twitter (@christianliebel).