Here are several groups to join up with for local web designers and developers.
North Scottsdale Web Design and Development
General meetings as well as presentations such as Cordova, Ionic, Git, and SASS. Scottsdale Airpark location.
Ruby On Rails Arizona
Headquartered in Scottsdale with various meeting locations, this is the go-to group for Rails devs.
Website: http://www.meetup.com/AIGAaz/ (their Meetup page)
AIGA is the premier professional organization for designers and graphic artists. The Arizona chapter hosts all sorts of events including Design Week in the fall.
With meetups typically in downtown Phoenix or Tempe, this group features presentation nights as well as small-group q&a workshops. All levels are invited to attend.
The Arizona Software Community
This group meets in Tempe and Phoenix on a diverse technology set including Angular, Node, 3D printing, and MongoDB.