CTO & Head of AI | ex-YC

20+ jaar ervaring in het bouwen en opschalen van AI-gedreven platformen. Ex-YC founder, nu help ik startups en scale-ups productie-AI te shippen, engineering teams te bouwen, en de technische kant goed te krijgen voor investeerders.

Beperkte beschikbaarheid.Medeoprichter vanKlimeAdviseur bijChangeBlueCoach bijCodehive
KLMWakoopaRoadSkinVisionDPG MediaOthotBottlenoseRekall.aiARAGTidalflowEvidenceHuntY CombinatorDig VenturesKiloKLMWakoopaRoadSkinVisionDPG MediaOthotBottlenoseRekall.aiARAGTidalflowEvidenceHuntY CombinatorDig VenturesKilo

Over mij

Ik bouw al meer dan twintig jaar software, van een Y Combinator startup in Silicon Valley tot fractional CTO-rollen door heel Amsterdam en daarbuiten. Het grootste deel van die tijd heb ik besteed aan het moeilijke deel: AI en data omzetten in systemen die daadwerkelijk werken in productie, niet alleen in demo's. Ik geef om architectuur die schaalt, security die er vanaf dag een in zit, en het opleveren van dingen waar gebruikers op vertrouwen.

Bij Kilo Code hielp ik een AI-codeerassistent opschalen die meer dan een biljoen tokens per week verwerkt. Bij Bottlenose bouwde ik real-time social analytics pipelines vanaf de grond. Het patroon is steeds hetzelfde: neem iets complex, breng er structuur in, en ship het.

Hands-on waar het ertoe doet, strategisch waar het telt.

Coen Stevens

AI & ML Architectuur

RAG-pipelines, agentic AI-systemen, LLM-lifecyclemanagement. De focus is altijd hetzelfde: AI voorbij de demo en in productie krijgen.

Platform Engineering

Schaalbare data-intensieve platformen, cloud-infrastructuur (AWS, Azure) en security-first systeemontwerp van prototype tot productie.

Engineering Leiderschap

Engineering teams bouwen en opschalen, technische richting bepalen, en de persoon zijn die founders voor investeerders zetten als de vragen technisch worden.

Security & Compliance

Security-first architectuur, compliance in domeinen als gezondheidszorg en juridisch, DPO-verantwoordelijkheden en enterprise-grade systemen.

Diensten

Van hands-on engineering tot strategisch leiderschap, ik help startups en scale-ups het juiste te bouwen en te shippen.

Het Track Record

Twee decennia bouwen, shippen, en af en toe dingen stuk maken bij startups en scale-ups.

Jaar ervaring

Funding opgehaald door portfoliobedrijven

Bedrijven & startups

Wat anderen zeggen over de samenwerking

I've had the pleasure of working together with Coen on a roller coaster startup venture in both Amsterdam and Silicon Valley. During this time, he has routinely impressed me with the ease with which he picks up new technologies, architected two production systems in two different frameworks, and overall by his sheer work capacity. In addition, as our CTO he has shown great technical leadership over our small team of developers, and in general I consider him one of the best technical minds that I know. I recommend him wholeheartedly.

PT
Peter TegelaarFractional Chief AI Officer | ex-Klarna, ex-YC

Coen did great work at Wakoopa rewriting and improving our recommender system and version parser. He needs very little time to understand complex problems and solving these problems with the right tools, even if he needs to learn them from scratch. Coen is passionate about everything related to statistics and machine learning systems. Very easy to get along with and works well in a team.

Over the past months I hired Coen as a Rails developer for a scrum based web project we ran for an educational publisher. Coen has proven to be a hard working consultant, a pure teamplayer with a positive attitude and a strong can-do mentality. This guy is highly recommendable!

BT
Bart ThijsProject & Programma Management

Veelgestelde vragen

Inzichten

Gedachten over AI, engineering en producten bouwen. Oorspronkelijk gepost op LinkedIn.

Coen Stevens
Coen StevensStevens.devPremium

CTO & Head of AI | Lead Product Engineering | ex-YC Founder

15 jul 2026

Anaconda acquired Kilo today. Almost 10 trillion tokens a month, used by more than 3 million developers. Congratulations to everyone at Kilo, especially those I had the pleasure of working with.

AI on Your Own Terms: Anaconda Acquires Kilo Code

AI on Your Own Terms: Anaconda Acquires Kilo Code

anaconda.com

Coen Stevens
Coen StevensStevens.devPremium

CTO & Head of AI | Lead Product Engineering | ex-YC Founder

2 jul 2026

I had my birthday last week, time to reflect on the past year. So, cue the obligatory staring-into-the-distance photo. Here goes. Almost everything good about the past year came down to the people in it. Which, it turns out, is the oldest bet in startups: YC funds people, not ideas. Ideas pivot, markets move, the team compounds. I co-founded Klime this year, out of the Hacker building, alongside Robert Gaal, Stefan Borsje and Patrick Nijssen, people I really enjoy spending my days with. Before that, a chapter at Kilo, and people there I'd work with again in a heartbe

Coen Stevens gazing into the distance with one of his kids beside him
Coen Stevens
Coen StevensStevens.devPremium

CTO & Head of AI | Lead Product Engineering | ex-YC Founder

12 jun 2026

What is your favorite agent skill? And why is it /grill-me? The biggest risk with AI agents isn't bad execution. It's thinking your plan is clear when it isn't. I used to handle that by hand. I'd tell the AI to debate me, poke holes in the plan, play devil's advocate. It pushed back for exactly one reply, then went right back to agreeing with everything I said. /grill-me, a tiny skill by Matt Pocock, keeps the pressure on. The whole thing is about ten lines. Before the agent builds anything, it interviews the plan. One question at a time. What's ambiguous, what's as

grill-me - an agent skill by Matt Pocock

grill-me - an agent skill by Matt Pocock

github.com

Coen Stevens
Coen StevensStevens.devPremium

CTO & Head of AI | Lead Product Engineering | ex-YC Founder

10 mrt 2026

I have Claude Code sessions running across 4 projects and no idea which one just finished. Claude Code's VS Code extension (v2.1.70) just added a sidebar that shows all your sessions continuously (no more searching in the topbar) with status indicators. Blue dot means it needs permission, orange means it finished while you weren't looking. You can open agents in separate tabs now. Getting very close to Cursor. The visual cues are nice but easy to miss. So I stumbled upon Peon-Ping. It plays sound effects when your AI agent needs attention. Warcraft III peons, StarCra

peon-ping - Stop babysitting your terminal

peon-ping - Stop babysitting your terminal

peonping.com

Coen Stevens
Coen StevensStevens.devPremium

CTO & Head of AI | Lead Product Engineering | ex-YC Founder

10 dec 2025

Excited to see this milestone become public: Kilo Code raised $8M in seed funding. Grateful to have been part of the journey from the early days, working alongside an incredible team. Moments like this remind me how fast things move when you operate at Kilo Speed, leaning fully into velocity, execution, and learning through shipping. There's something powerful about shipping early and often, even when it's imperfect, and letting real feedback shape what comes next. In the last month alone we have released parallel agents, one-click deploy, code review, autocomplete,

Kilo Code raises $8M in seed funding as its open-source AI coding agent hits #1 on OpenRouter

Kilo Code raises $8M in seed funding as its open-source AI coding agent hits #1 on OpenRouter

techstartups.com

Coen Stevens
Coen StevensStevens.devPremium

CTO & Head of AI | Lead Product Engineering | ex-YC Founder

6 apr 2023

Do you know why Kubernetes is a great fit for Startups? Or you just don't know how to get started? Find out why and how you can leverage k8s for your MVP or business in my latest blog.

Running your Startup on Kubernetes ($90 per month)

Running your Startup on Kubernetes ($90 per month)

beatletech.com

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