Koen Verstrepen

AI builder + leader

I build agentic AI systems and large-scale recommender engines, from first principles to production. I have strong conviction on combining leadership with being hands-on. This site is where I share the patterns, failures, and lessons from systems I'm shipping.

Looking to trade notes with peers working on similar problems.

Latest writing & projects

writing
#llm#synthetic-data#deepseek#ai-training#reinforcement-learning

How LLMs get smarter from self-generated data

Discussion on whether LLMs get smarter or dumber when they try to learn from their own data, based on empirical evidence from building DeepSeek V3.2.

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project
#ai-agents#web-crawling#rag#llm#infrastructure

Making AI Agents Browse the Web Blazingly Fast

Benchmarking managed web crawling APIs for AI agent pipelines. Spider.cloud's smart waterfall approach delivers 2x more content at 5x lower cost.

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