About

I build Timmy the way I would want a baby monitor for my own family.

It should work reliably in daily life, use little data, and stay technically open enough that you do not have to trust me blindly.

Tim Kaltenbrunner · Zurich
Tim Kaltenbrunner

I live in Zurich, am married, and have two daughters. Professionally, I work as a software developer at Zürcher Kantonalbank. Timmy started with a simple wish: I wanted a baby monitor whose technology and data flows I could understand myself.

I implement the app entirely with AI assistance. I set the direction: concepts, architecture, code review, privacy, security, and releases remain my decisions.

  • 15+ years in software engineering reliable systems in environments where care matters
  • MSc TU Munich + ETH Zurich CAS Data Management Systems and Big Data
  • No tracking, no cloud recordings documented security architecture, not a black box
View security core How Timmy is built with AI

Privacy first

Timmy should process only what the connection needs: no analytics SDKs, no cloud recordings, and data flows you can read about.

Technology with readable boundaries

I keep the security core separate. Pairing, signaling, and backend boundaries live there so they can be checked.

AI with human review

AI helps me build faster. What goes into the app is still my decision after review.