Theo Park

@theo

Software engineer who ships ideas as videos, code, and ebooks. AI tools, dev infra, and a small problem with mechanical keyboards. NYC.

Courses I recommend

Free or nearly free. Ordered roughly by where to start if you're getting into AI engineering.

Start here if you've never built an agent

YouTube · Tech With Tim

Andrej Karpathy — Neural Networks: Zero to Hero

The foundational course. Free, ~10 hours, you build a GPT from scratch by the end.

fast.ai — Practical Deep Learning for Coders

Top-down, hands-on, deeply pragmatic. Free. Best second course after Karpathy.

Hugging Face — NLP Course

The best free path into transformers if you want to skip most of the math.

Anthropic — Prompt Engineering Interactive Tutorial

Free Jupyter-style course. Best prompting reference I've used — Claude-flavored but transfers.

DeepLearning.AI — Short Courses

Free 1-hour courses on RAG, agents, evals, function calling. Snackable.

LangChain Academy

Free. Slower-paced. Good if you want to ship something using LangGraph soon.