# Hey, I'm Stefan 👋

Senior Software Developer & Software Architect based in Munich, with 20+ years of experience building and running microservices and IT architectures. Current focus: **.NET Core**, **Kubernetes**, and **AI-driven software development** (Claude Code).

## 🚀 What I do

- **Architecture & Backend:** .NET Core (containerized), Clean Architecture, Microservices
- **Infrastructure:** Kubernetes, Terraform, Azure (WebApps, Tables, Blobs), Docker
- **AI-assisted development:** Claude Code at work for end-to-end delivery — from concept through documentation (Confluence, Jira) to production. Privately, I run OpenCode with models like MiMo V2.5, Laguna S 2.1, GLM 5.2, DeepSeek V4 Flash and North Mini Code
- **Observability & Ops:** Sentry, Loki/Grafana, Uptrends, Quartz.NET
- **Search & Data:** Solr, vector search, MariaDB, InfluxDB, MongoDB

Currently at **TENHIL GmbH & Co. KG**, responsible for migrating background workers to Kubernetes, building an MCP server for a ChatGPT integration, and establishing a production-ready AI development workflow for the team.

## 🔭 More about me

- 📄 My full CV & project portfolio: [stefankoelle.de](https://stefankoelle.de)
- 🏠 I run an extensive homelab: [Proxmox](https://infra.moonweb.org/proxmox/), [Docker](https://infra.moonweb.org/docker/), MQTT, InfluxDB, [home automation](https://smarthome.moonweb.org/), retro computing (Atari ST, Amiga, MiSTer FPGA)
- 🐘 My [software roots](https://stefankoelle.de/#programminglanguages) go back to 1992 (Pascal, Assembler, GFA Basic on the Atari ST)

## 🔗 Links

[![CV](https://img.shields.io/badge/CV-555?style=for-the-badge&logo=googlechrome&logoColor=white)](https://stefankoelle.de) 
[![Personal Hub](https://img.shields.io/badge/Personal%20Hub-3b6ea5?style=for-the-badge&logo=homeassistant&logoColor=white)](https://hub.moonweb.org) 
[![LinkedIn](https://img.shields.io/badge/LinkedIn-0A66C2?style=for-the-badge&logo=linkedin&logoColor=white)](https://www.linkedin.com/in/stefankoelle/)

## 📌 Pinned

A selection of projects. Full catalog: [code.moonweb.org](https://code.moonweb.org)