I am maintaining a few contrib modules on Drupal.org in my spare time. The most exciting are:

• Webform 8.x - co-maintainer
• Webform Views 8.x - maintainer

Rest of my modules you can easily find below from my commits :)

Whenever there is an occasion, I take a chance to speak at Drupal/IT events:

• NerdSummit 2019, MA, USA - session on "How your webserver processes concurrent requests"
• Drupal Camp Atlanta 2018, GA, USA - workshop "Advanced Webform 8.x"
• Free Security 2018, Mexico - 2 workshops and 1 session
• OSCAL 2018, Albania - session on "Website vulnerabilities"
• DORS/CLUC 2018, Croatia - session on "Architecture your code"
• Free Security 2017, Mexico - a workshop and a session