Mathias Steierl | Fullstack Cloud Developer

The Maker-Engineer: Mind, Hand, and Heart.

My technical foundation is built on practice. After completing my apprenticeship as an Industrial Mechanic, I studied Automotive Computer Science. During my studies, I worked in parallel as a Java Developer, allowing me to apply theoretical knowledge immediately and learn to take ownership of projects at an early stage.

Today, I work as a Fullstack Cloud Developer at CARIAD in international DevOps teams, but the "Maker" in me remains. Whether designing cloud architectures or welding my own home gym equipment—I want to build things that last.

"I am not a theorist sitting in an ivory tower. I am a practitioner who rolls up his sleeves—whether it's deploying a new Kubernetes architecture or welding a dumbbell rack."

Engineering Projects

REST, MQTT & Proxmox

Intelligent Energy Core

A robust integration orchestrating Sonnen Batteries and go-eChargers within a private Home Assistant cloud on Proxmox.

By bridging the Sonnen Battery API (REST) with the Charger (MQTT), I developed custom sensors and logic to achieve the best possible solar self-consumption when charging—far exceeding standard manufacturer features.

System Overview (Home Assistant)

Real-time Optimization Logic

Long-term Reliability (2024-2026)

Sector Coupling & IoT

Climate & Resource Management

Holistic control of indoor climate through a combination of classic pellet heating and modern infrared technology.

Pellet Tracking

Predictive monitoring of fuel consumption and real-time visualization of physical stock levels.

Infrared Autarky

Active control of infrared panels exclusively during PV surplus. The house becomes an energy storage unit.

Smart Security & AI

A local security ecosystem with zero cloud dependency.

Multi-Sensor Fusion: Heat detection via floor sensors, Zigbee & Netatmo.
Private & Offline: Frigate/Coral AI image analysis hosted locally.

Integration & Infrastructure

Connecting "Dumb Devices" with modern IT security standards.

Smart Pool

Weather-based control of pumps and heating.

Privacy by Design

Consistent local-only strategy for critical systems.

Prototyping

CAD & 3D printing for custom housings and mounts.

Professional Experience

Fullstack Cloud Developer

CARIAD (Volkswagen Group) | since 2024

Development in international DevOps teams using Go and Cloud technologies.

Senior Security Engineer

CARIAD | 2022 - 2024

Conducted security analyses and threat modeling for vehicle systems.

Cyber Security Architect

AUDI AG | 2015 - 2022

Engineering Secure, Intelligent Systems