Theo Park

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.

Building an AI agent in public — new episodes Mondays. Sub on YouTube.

The agent walkthrough I'd start with

YouTube · The Carbon Layer

Book a 1:1 mentoring call

30 minutes — career, side projects, or AI tooling.

Take with you

Ship It — free ebook (78 pages)

A 30-day system for building and shipping indie AI tools. Excerpt today, full PDF on Substack.

Resume (2026)

Senior engineer roles · AI/infra preferred · remote or NYC.

Hire me / consulting inquiries

AI agents, dev infra, technical writing. Email first — calendars later.

AI projects I've shipped

tiny-gpt — a GPT in 300 lines of NumPy

Following Karpathy's nanoGPT, stripped further. Two-hour video walks through the math.

pr-agent — Claude that ships pull requests

Agent reads a GH issue, writes the patch, opens the PR. Bring your own keys.

substack-rag — chat with my own writing

Self-hosted retrieval over my Substack archive. Open source the day after each episode.

embeddings playground

Drop any text. Watch the 1024-d vectors collapse to 2D and cluster. Browser-only.

eval-harness — minimal LLM evals you can read

A 200-line eval harness that doesn't pretend to be Weights & Biases.

Courses I recommend

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.

Keyboards I use

HHKB Studio

Topre 45g. Pointing stick + gesture pads. The daily. Worth the price.

ZSA Moonlander

Split, ortholinear, fully programmable. Travel keyboard — fits in carry-on.

keychron.com

Keychron Q1 Pro

Wireless 75% with hot-swappable switches. Heavy in a good way. Recommended starter.

Glove80 (MoErgo)

Concave columnar split. Most ergonomic I've tried — but the learning curve is real.

Realforce R3

Topre full-size for long writing sessions. The marathon keyboard.

Logitech MX Keys S

What plugs into the laptop on the road. Not exciting, but it just works.

personna