Available for complex architectural challenges

Secure Software, Tangible Engineering.

Fullstack Cloud Engineer & Security Architect.
The bridge between Enterprise DevOps and craftsmanship precision.

Explore Projects My Journey
Go Kubernetes Cloud Security IoT / MQTT Terraform
Mathias Steierl
My Foundation

From Industrial Mechanic to Cloud Architect.

My technical journey began at the workbench. As a trained Industrial Mechanic, I learned that every system is only as strong as its weakest link. I transferred this mindset to my studies in Automotive Informatics and my years of experience as a Java developer.

Today, I design highly available cloud infrastructures at CARIAD, while privately pursuing my passion for prototyping and IoT. I appreciate the elegance of clean code just as much as a perfectly welded seam.

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

Pragmatism

Solutions that work in the real world.

Quality

Security & stability by design.

Portfolio

Engineering Showcases

An excerpt of my private projects where I combine hardware integration with modern software architecture.

Flagship Project Go Flutter Ollama PostgreSQL

Cogni-Cash

Privacy-First Financial Intelligence Engine

View on GitHub

Cogni-Cash is my vision for sovereign financial management. Instead of sending sensitive bank data and payslips to the cloud, this system combines a robust Hexagonal Architecture in a Go backend with local AI processing (Llama 3). The result is a highly secure, self-sufficient system that uses machine learning to detect, categorize, and forecast financial patterns.

Local AI (Ollama)

Automatic parsing of invoices and documents with zero cloud dependency.

Predictive Analytics

Forecasts cash flow, calculates burn rate, and uncovers seasonal trends.

Clean Architecture

Strict, highly testable Go backend built on Hexagonal Architecture principles.

Mobile Vault

Offline-first Flutter application with a local Isar database cache.

Cogni-Cash Dashboard

Main Dashboard

Central overview of all financial flows, budgets, and live transactions.

Cogni-Cash Analytics

Deep-Dive Analytics

Detailed evaluations and interactive charts to detect spending patterns.

Cogni-Cash Forecast

Predictive Cashflow

Future forecasts based on past patterns and fixed cost detection.

Cogni-Cash Payslips

Document Extraction

Local AI automatically extracts payslips and invoices into structured data.

Cogni-Cash Categories

Transaction Organization

Clear and automated categorization of all income and expenses.

Energy Transition & Sector Coupling

Smart Energy Orchestration

Intelligent Energy Core

Development of a central control unit to optimize solar self-consumption. Integration of Sonnen Batteries (REST API) and go-eChargers (MQTT) within a local Proxmox cluster.

Dynamic Load Balancing

Automatic adjustment of charging power based on real-time battery status and PV yield.

High Availability

Hosted as virtualized instances on Proxmox for maximum reliability of critical home logic.

Python MQTT Home Assistant REST API
Dashboard
System Overview (Home Assistant)
Optimization
Real-time Optimization Logic
Climate Control
IoT Extension

Resource Management & Sector Coupling

Holistic control of the indoor climate by combining a classic pellet heating system with infrared heating powered by PV surplus.

ESP32 Monitoring Predictive Analysis

Integrated Security Architecture

Security & AI

Smart Security & AI

A local security ecosystem without cloud dependencies. Integration of AI-based object detection for intelligent monitoring and threat prevention.

Local Computer Vision

Frigate/Coral AI image analysis hosted locally. Detects people and objects without transmitting data to external servers.

Multi-Sensor Fusion

Combining fire detection, soil moisture (Zigbee), and Netatmo sensors for comprehensive property protection.

Security
Security Architecture
Network Infrastructure

Home Perimeter Hardening

Implementation of an enterprise-grade security concept for the home lab via OPNsense. Focus on Zero-Trust principles and network isolation.

OPNsense & VLANs L3 Segmentation

Professional Experience

Fullstack Cloud Engineer

since 2024
CARIAD (Volkswagen Group)

Development of cloud-native services in international teams. Focus on Go, microservices, and robust deployment pipelines within the Automotive Cloud.

Senior Security Engineer

2022 — 2024
CARIAD

Security architectures for vehicle functions. Execution of TARA (Threat Analysis and Risk Assessment) and guidance through the Secure Software Development Lifecycle.

Cyber Security Architect

2015 — 2022
AUDI AG

Design and hardening of connected vehicle systems.

Let's Connect

Ready for the next project?

Send Email

info@steierl.org
85114 Buxheim (Ingolstadt area)