Hi I'm Jack. I build large scale RecSys and agentic systems for a day job. This blog is a mix of essays about AI, personal research projects, and crisp explanations of hard concepts. All posts are 100% written by me (no clankers).

• The Math Behind RL for LLMs - Part 1, Foundations
  Learn the foundations that actually matter for modern RL, by writing equations and hand coding a simple model
  May 24, 2026
• Evaluating the Evals
  How online evaluation determines the winners in AI
  May 13, 2026
• From Double Descent to Scaling Laws
  From high variance CNNs, to low variance LLMs
  Apr 26, 2026