Building AI Systems - and building systems with AI
Who’s writing this
I’m Rafael Pierre. I build AI systems for a living, and Lighthouse is where I write down what the work actually looks like: the numbers, the failure modes, and the decisions that don’t make it into the launch post.
Lighthouse AI is a weekly newsletter focusing on building AI systems (and building systems with AI). It’s written for people who build: engineers, data scientists, hackers, and product folks working with LLMs, AI and agents day to day.
A feel for what you’ll get:
Subscribe and you’ll get one issue a week. Hit reply on any of them and tell me what you’re building or what’s biting you right now. I read every reply, and it directly shapes what I write next.





