George Guimarães.

Ecto's embedded schemas and changesets give you casting and validation in a declarative API, and I reach for them constantly.

I spent years as a consultant walking into other companies' engineering teams and culture.

The Leiden algorithm is the modern replacement for Louvain for community detection in graphs.

I've spent a good part of my career writing code, consulting for dozens of companies, launching products, and managing engineering teams.

If your company forces password changes every 90 days, your company is making you less secure.

Keep one GitHub account for your entire career.

I just open-sourced Hallmark, a small Elixir library I wrote to score whether an LLM's output is actually grounded in source material or if it's making stuff up.

I know.

I've built RAG systems more than once now.

When I was building the retrieval layer for Arcana, single-vector search kept disappointing me on technical queries.

Everyone calls themselves an "AI-assisted developer" now.

The previous post about AI agent frameworks and Elixir landed on Hacker News and the pushback was fair.

Testing LLM outputs is frustrating.

Follow-up: This post got some fair pushback on Hacker News.

I've been on both sides of live coding interviews.