Leo Ritzenthaler
Information Electronics Technician & Founder of Ritzenthaler IT
I turn uncertainty into security — with reliable systems and clear decisions.
Security through reliable systems
I'm Leo — an Information Electronics Technician based in Munich, Germany. My mission is to make companies secure and capable of action, with reliable security systems and clean data infrastructure.
As a qualified Informationselektroniker at Elektro Kreutzpointner GmbH, I work daily with fire alarm systems, KNX building automation, and IT networks. Parallel to that, I founded Ritzenthaler IT — delivering IT network planning, VoIP, and IP camera solutions.
I'm also an iOS developer with three shipped apps: 3DFire (AI-powered fire detector planning), WattWissen (my apprenticeship graduation project), and PhysioMaid — a mobile office for physiotherapists, currently in beta.
I graduated top of my class — skipping a full school year — and received multiple state-level awards for academic excellence. Currently pursuing my Meister qualification in Information Technology.
Where I've worked
Where I learned
Things I've built
Side projects and products I've shipped — combining security expertise with software development.
3DFire
An AI-powered iOS app that supports digital planning of smoke and heat detectors. Simplifies the layout and compliance process for fire alarm systems.
PhysioMaid
A mobile office for physiotherapists — scan prescriptions with OCR, manage patient records, schedule appointments with Apple Calendar sync, and generate professional PDF invoices. Fully offline, all data stays on device.
WattWissen
My graduation project as Informationselektroniker — a self-built iOS app using Swift and Xcode. Demonstrates deep knowledge of Apple's development ecosystem and AI integration.
My other websites
Other sites and tools I run across different domains.
Writing
Thoughts on IT security, software, and building things.
Licenses & certifications
Every credential I hold — fire alarm systems, building automation, IT and project management.
Brandmeldesystem Integral EvoxX I 1.9 Programmierung von Wasserlöschanlagen
Workshop FlexES Control
Brandmeldesystem Integral EvoxX I 1.3.A Aufbaukurs Grundlagen Programmierung
Brandmeldesystem Integral EvoxX I 1.3 Grundlagen Programmierung
Brandmeldesystem Integral I 1.2 Grundlagen
Workshop System 8000 Teil 1 — Selbstlernmodul
Workshop System 8000 Teil 2 — Praxis
How to prevent access to KNX Installations
ETS ECampus
Gesellenbrief für Informationselektroniker
ASIP
Recognition
Let's work together
Whether you need secure IT infrastructure, fire alarm systems, or an iOS app — I'm always glad to talk. Send me a message and I'll get back to you.