Matthias Vongerichten Freelance Software & Data Engineer, Berlin, DE
Matthias Vongerichten

Matthias Vongerichten

Freelance Software & Data Engineer, Berlin, DE

tl;dr: LinkedIn Malt

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About Me

I built Mercedes-Benz 🚗 software for almost a decade, then spent nearly four years integrating data 📄 at ARMEDANGELS 👼. Since November 2024 I work for myself.

Most of what I do now is AI agents 🤖 and automation. I run Von Court Agents, a fleet of specialist agents running on EU-hosted models 🇪🇺 with no US cloud in the loop — and I am currently building an emissions accounting platform for Zukunftswerk eG, end to end. I like Python, TypeScript, PostgreSQL and Kubernetes.

I choose projects by the sustainability impact they can have 🌿 — that is my filter, not my niche. Whatever the domain, the work still has to be engineered properly.

Want me for freelance work? You can contact 📧 me in english, german and you can also try hungarian.

"We must all suffer one of two things: the pain of discipline or the pain of regret or disappointment."

– Jim Rohn

Services

💪 I'm good at...

  • AI Agents & Automation
    • Agent fleets and orchestration (Claude, MCP, n8n)
    • LLM integration – retrieval, embeddings, evaluation (Python)
    • Workflow Automation (Airflow, Python, n8n)
  • Data Integration
    • Data Processing & Replication (Airflow, Python)
    • Data Modeling (dbt, Snowflake, Looker)
  • Backend Development (Python, FastAPI, Java, PostgreSQL)
  • Infrastructure Automation & Self-Hosting (Kubernetes, Docker)
  • Research & Proof of Concepts
  • Technical Product Ownership/Management (Jira, Confluence)

🧪 I'm experimenting with...

  • Sovereign AI – EU-hosted and local models as the default, not the fallback
  • Long-lived memory for agents across sessions
  • ... and a lot more!

Experience

  1. –
    Present

    Zukunftswerk eG

    Freelance Software Engineer

    • Built an emissions accounting platform end to end – sole engineer
    • Web application and UI (Next.js, React, TypeScript)
    • Backend services and APIs (FastAPI, Python)
    • Data model and processing pipelines (PostgreSQL, Python)
    • Embedding-based matching of activity data to emission factors (Python)
    • Containerised deployment across development, staging and production (Docker)
    Next.js TypeScript FastAPI Python PostgreSQL Docker

  2. –

    ARMEDANGELS logo

    ARMEDANGELS

    Data Engineer

    • Introduced unit tests into the Airflow environment (Python)
    • Refactored Airflow DAGs and Operators (Python)
    • Transformed XML files (XSLT, Python)
    • Created and maintained a system landscape (diagrams.net, UML)
    • Built BI reports and dashboards (Looker, Excel, DAX)
    • Maintained and extended the data model/data warehouse (dbt, Snowflake, SQL)
    • Integrated several partner services (Python, Airflow, WSDL, REST)
    Airflow Python UML Looker dbt Snowflake

  3. –

    Mercedes-Benz logo

    Mercedes-Benz

    Software Engineer & Technical Product Owner

    • Technical Product Owner of the MB Vans Configurator for potential end customers – owned the product and its technical direction (Java, TypeScript)
    • Technical Product Owner Proxy of a vehicle configuration and offer creation application, critical to MB Vans Sales
    • Oversaw the modernization of the MB Vans Configurator tech stack, directing the developers who built it:
      • Migration from Oracle to PostgreSQL DB (Java, Spring Boot)
      • Migration from a legacy application for data manipulation to a low-code platform (Retool, JavaScript, SQL)
      • Automation of data processing and software deployments (Jenkins, Java, Shell)
      • Migration to a container orchestration platform (Kubernetes)
    • Managed the technical side of adapting and operating a modified version of the MB Vans Configurator API for an internal customer (Java, Spring Boot, Git)
    • Managing software development in Scrum-style, and coordinating user testing (Jira, Confluence)
    • Planning and execution of the rollout of software versions in various countries (Jira, Confluence, GitHub)
    • Ascertaining of customer requirements, and creation of epics and stories (Jira)
    • Giving presentations on future software features to international audiences (PowerPoint)
    • Driving the rollout of usage analytics across multiple applications (Adobe & Google Analytics)
    • Acting within the department as an expert for a complex vehicle configuration interface (Java, Postman)
    • Managing external development team
    • Creation and ongoing maintenance of comprehensive representation of the department-wide system and service landscape (diagrams.net)
    • Developed the scenarios for modernizing legacy applications (micro frontends, microservices)
    • Drove the introduction of E2E monitoring for the production environment (Jenkins, Protractor, TypeScript)
    • Designing an interface for an internal financing service (OpenAPI)
    • Introduced a smoke test automation process built on SikuliX (open source, Python, OCR-only)
    • Administration of Jira, Confluence and SharePoint instances
    Java TypeScript Spring Boot PostgreSQL Kubernetes Jenkins Retool
  4. ...

Projects

Von Court Agents

A fleet of specialist AI agents, self-hosted

A set of agents that each own one job – infrastructure maintenance, bug fixing, email, UI work, coordination – instead of one assistant that does everything badly. They share a memory layer, a credential broker that isolates every agent's secrets from the others, and a task board they pull work from.

Two constraints shape the design. Everything runs on EU-hosted models with no US cloud in the loop, so the data stays under European jurisdiction. And model choice weighs emissions per task as a first-class criterion, not an afterthought – the smallest model that can do the job gets it.

Python MCP Docker Matrix Notion API

Education / Training

Master of Computer Science (on hold)
IU International University of Applied Sciences, Germany; part-time; approx. 40% completed
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Bachelor of Science – Business Informatics
AKAD University Stuttgart, Germany; part-time; grade 2.1
-

Courses

Data Analyst Nanodegree
Udacity
Professional Scrum Master I
Scrum.org

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