Fractional CTO & AI Engineer
15+ years building and scaling AI-driven platforms. Ex-YC founder, trusted by founders and investors to lead technology through 0→1 builds, hypergrowth phases, and high-risk transitions.
About Me
As a seasoned CTO and founder with over two decades of experience, I excel in building and scaling data-intensive, secure, and AI-driven platforms. My journey began as an ex-YC founder, where I honed my skills in leading technology through pivotal 0→1 builds and hypergrowth phases. My expertise lies in translating advanced AI into production-grade systems, with a proven track record in platform architecture and security-first design.
I thrive in high-stakes environments, consistently delivering results by aligning teams around clear priorities and shipping production-ready systems. Whether serving as engineering lead at Kilo Code or pioneering real-time analytics at Bottlenose, I bring order to complexity and clarity to technical direction. Hands-on where it matters, strategic where it counts.
AI & ML Architecture
Agentic AI systems, RAG pipelines, LLM lifecycle management, and translating AI feasibility beyond demos into production-grade systems.
Platform Engineering
Scalable data-intensive platforms, cloud infrastructure (AWS, Azure), and security-first system design from prototype to production.
Engineering Leadership
Building and scaling teams, defining technical strategy, roadmap execution, and serving as technical counterpart to founders and investors.
Security & Compliance
Security-first architecture, regulatory compliance in domains like healthcare and legal, DPO responsibilities, and enterprise-grade systems.
Tools & Technologies
Services
From hands-on engineering to strategic leadership, I help startups and scale-ups build, ship, and grow with confidence.
Projects
A selection of recent projects where I led engineering, built AI-driven platforms, and scaled teams from prototype to production.
Driven by Impact. Backed by Results.
My strategic vision and hands-on approach have been instrumental in securing significant funding, scaling platforms, and delivering production-ready AI systems across industries.
Years of Experience
Funding Raised by Portfolio Companies
Companies & Startups
What others say about working with me
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.
PTPeter 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.
WBWouter BroekhofTech Person
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!
BTBart ThijsProject & Programma Management
Get in touch
I'd love to hear from you! Feel free to reach out to me for any inquiries or to schedule a call.
Let's get you to the right place
Reach out to me! I'm eager to learn more about you and how I can help.