About

The engineer in the room — who also reports to the board.

I’m Matthijs van der Kroon. For 15+ years I’ve built and led the data and AI systems behind products people actually use.

Portrait of Matthijs van der Kroon
Matthijs van der Kroon
Utrecht, the Netherlands

I work with growing companies whose business runs on technology — SaaS, e-commerce, data-heavy operations — that have outgrown their original architecture or engineering organisation. I usually come in for three to nine months to modernise the platform, improve how the team delivers, and build production AI capabilities — and unlike many fractional CTOs, I stay hands-on throughout.

What sets me apart isn’t that I advise, and it isn’t that I code. It’s that I do both: I can sit with a board on Monday and pair on a Kubernetes operator on Tuesday. That range is rare, and it’s where I’m most useful — translating strategy into systems that ship. It’s also why I build my own tools: Flywheel, an open-source GitOps dev-loop that gets a commit into a running pod in under thirty seconds, came out of exactly this work — and runs at my client engagements.


The short version

  1. 2026Fractional CTO · Agritech SaaSTechnical strategy, scaling roadmap, board reporting, cloud cost.
  2. 2025–26AI/ML platform engineer · E-commerce groupAWS EKS, ClickHouse lakehouse, MCP/Claude analytics, K8s operator.
  3. 2024–25Sabbatical · Own house buildDesigned and built my own family home, hands-on.
  4. 2020–23Lead data platform engineer · Asset managementLed ~10; Spark, Snowflake, Kubernetes for financial risk & forecasting.
  5. 2017–23Co-founder & CTO · ML personalisationZero to market fit; real-time recommendations to millions; 20%+ pageviews.
  6. 2015–17Lead data engineer · BroadcasterNext-gen analytics/ML platform, 50+ TB per day.
  7. 2011–13Software engineer · 34th America’s CupPerformance analytics for the Swedish Challenger of Record.

Credentials

  • MSc Software Engineering, cum laude — Universitat Politècnica de València
  • BSc Information Science — Utrecht University
  • Dutch & English (native) · French · Spanish
  • AWS · Azure · GCP · Kubernetes · ClickHouse · Kafka · Python · Go · Scala
  • Author of Flywheel — open-source GitOps tooling · github.com/cobr-io/flywheel

Next step

Let’s talk about where your engineering is heading.

A 30-minute call, no pitch. Tell me what’s slowing you down and I’ll tell you honestly whether I can help.

Prefer a bounded first step? Start with the two-week review