This post tries to provide an entry point for newcomers to the tech scene in Frankfurt.
If you are looking for a more specific topic and want to meet people that code in your language of your choice, check out the list of technology user groups or @ugsrock on Twitter. With more than 100 there is no shortage of events to go to. We have days where you had four events on on evening to attend. Gone are the days of the early 2010s when there was just on event in two weeks.
An important entry point to the startup scene is the Founders Table which meets every month. In the city of banks you can't avoid FinTech either, the FinTech Meetup is hands-down the biggest regular meetup in Frankfurt.
The mother of all tech events in Frankfurt is the Webmontag, now in its 10th year, a great opportunity to connect with people that are somehow doing things with the internet, and if you have a project or are looking for support they always provide spotlight slots on their stage. A must-go once every month!
A neighbor to the Webmontag is the Hashtag #RheinMainRocks a lot of Tweeps from the area use it to mark up local events and news related to the net community (Internetgemeinde) we affiliate ourselves with.
If you are a remote coder like me and in need of an awesome place to work from, come visit me for a coffee at Die Zentrale Coworking located in Bornheim Mitte which is the Friedrichshain of Frankfurt. Zentrale offers coworking plans from €90/mo with great coffee and awesome coworkers.
To learn more about Frankfurt in general, check out hallofrankfurt.de, written by and for Hipsters.
P.S.: Arguably Frankfurt is just the center of the rural area we call Rhein-Main-Gebiet so it's fair to mention that there are more and more events happening outside of Frankfurt, namely in Darmstadt given its strong tech scene connected to the local university. But given its central location with the biggest train station in Germany Frankfurt remains the gold standard for cities to run an event in.