Software that lasts. Built faster with AI.

What I do

• Architecture & modernisation

  Untangle legacy platforms, plan the migration, and stay hands-on until it ships. Cloud, Kubernetes, Infrastructure as Code.

• Interim CTO & engineering leadership

  Fill the gap while you hire, or take the first CTO seat at an early-stage company. Strategy, hiring, teams that own their work.

• Hands-on development

  Scala, Java, Python and TypeScript. AI integration from RAG to multi-agent systems and MCP, and helping teams adopt agentic coding without losing code quality.

• Technical due diligence

  An honest, readable assessment of a codebase, team and platform before you invest, merge or acquire.

Recent work

Freelance since 2022. A few of the things clients have trusted me with.

• 2026 · SME, custom web application

  Print shop

  Replaced a complex Excel-based order management and accounting setup with a simple, fast web application. Delivered in one week.

• 2023 – 2025 · Interim CTO

  Waste-management startup

  Led the system architecture migration, cutting infrastructure costs in half. Integrated truck scales into the platform.

• 2023 – today · Process orchestration, support platform

  Vehicle scanner manufacturer

  Maintain their Python process orchestration system. Replaced the ticketing tool with a custom support platform with AI capabilities and deep process integration.

• 2023 · Enterprise architect, integrations

  Energy utility

  SAP to Microsoft Dynamics migration as part of a digital transformation programme.

• 2022 – today · Software architect

  Automotive SaaS company

  Planning and building the platform modernisation with a team of five. Introduced Infrastructure as Code with AWS CDK. Technical advisor during a merger due diligence.

Splits

Twenty years, one leg at a time.

• 2019 – 2022

  Chief Technology Officer Automotive SaaS company

  Led the platform strategy with open APIs, enabling more than ten partner integrations. Grew the division from 10 to 30 people, restructured it into cross-functional teams and established product management.

• 2018 – 2019

  Head of Engineering Automotive SaaS company

  Led the migration from on-premise to AWS with Kubernetes, introduced CI, centralised logging and monitoring. Managed and grew a team of eight developers.

• 2014 – 2018

  Senior Scala Developer & Tech Lead Automotive SaaS company

  Search, performance and reliability on the platform. Onboarded and trained junior developers.

• 2011 – 2014

  Software Developer & Trainer Software consultancy

  Trainer for Scala, JavaScript and AngularJS. Consultant for automotive clients. Open-source committer to a type-safe Scala ORM.

• 2005 – 2011

  Software Developer Wholesale group

  Migrated an EDIFACT system from COBOL to Java handling more than 200,000 messages a day. Internationalised distributed Java systems for Eastern European markets.

• 2000 – 2005

  Software Developer IT service providers

  Apprenticeship and first years. Distributed call-center system in .NET, Linux and Oracle administration, business-process automation.

Products

Things I build and run on the side.

• Email validation SaaS

  CampaignKit

  Cleans mailing lists before you send. Real-time verification, a developer-friendly API, integrations with the usual CRMs and marketing tools, and an MCP server so AI assistants can validate addresses too. GDPR compliant, hosted in the EU.

  campaignkit.cc →

• iPhone app for running training plans

  RunFast Training

  Builds a periodised training plan around your fitness, your goal and the days you can actually run, with a target pace for every session. Completes runs from Apple Health with one tap. No account, no ads, no tracking.

  App Store →

Speaking

Conference talks I've given.

• 2013

  Leichtgewichtige Webanwendungen mit dem MEAN-Stack wJAX

  A tour of the MEAN stack (MongoDB, Express, AngularJS and Node.js) for building modern web applications end to end in JavaScript: schema-less data modelling, RESTful APIs on an event-driven server, and a client-side framework to tie it together. Slides →

• 2012

  Bidirektionale Verbindungen für Webanwendungen JAX, Mainz

  Why HTTP was never designed for two-way communication, and what to do about it. AJAX polling, Comet and WebSockets compared, plus the browser and proxy pitfalls, fallback frameworks like Atmosphere, and a look ahead at SPDY. Slides →

Good to know

Languages

German, English, Spanish

Tech

Scala · Java · Python · TypeScript · AWS · Kubernetes · PostgreSQL

Certified

AWS Solutions Architect · Functional Programming in Scala (EPFL) · Machine Learning (DeepLearning.AI)

Where

Remote, working with teams across Europe.