Hello, I'm

Daniel Shafer

I write software, teach it on YouTube, and put capital to work for people who need it through Chiron Capital and the Shaight Foundation. Based in San Francisco.

Get in touch↗ GitHub YouTube

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About

Putting technology to work for people.

01 / 03

My name is Daniel and I'm a software engineer and I'm passionate about making the world a better place through the programs I build and through Bitcoin.

I create and post coding lessons on front-end and back-end topics to the Arachne Tutorials YouTube channel and invest with Chiron Capital.

Ever since moving to the San Francisco Bay Area, I've been captivated by the way engineers and entrepreneurs use technology to solve the world's challenges and improve peoples' lives. I love working on teams, parsing problems, and learning.

↗ GitHub, last twelve months

Commits, pull requests, and the occasional issue.

See the full graph on GitHub.

Stack

ReactReduxTypeScript JavaScriptRubyRails PythonDjangoHTML / CSS

FOSS

Merged upstream

Fixes and features merged into useful open-source projects.

Silo Server typeshed Ecto Atuin Litestar nats.go templ minijinja indicatif Huma h3

All merged pull requests in public repos ↗

Currently

Running Vesper, a rule-based options trading system
Recording new lessons for Arachne Tutorials
Stacking sats and watching the blocks go by

↗ YouTube

Arachne Tutorials

Coding lessons for people who learn by building.

Selected work

Things I've built and backed.

02 / 03

↗ Trading system, live since 2026

A trading system that sells options premium by rule, not by feel.

Vesper scans a watchlist of leveraged ETFs every trading morning, sells cash-secured puts for the handful of strategies that have cleared a pre-registered backtest and paper gate, and manages each position with resting take-profit orders and an assignment guard. Collateral caps scale with the account, a dead-man health check halts new orders if anything goes stale, and every strategy keeps a paper twin so live fills can be judged against what they should have been.

It started as a Polymarket bot and taught me more about measurement than about markets: pre-register the test, cluster the sample, and never promote on a point estimate. Python, FastAPI, React, Postgres, Docker.

Every openScanned at the bell, sized against live equity

Every positionResting close at 50% of credit, guarded to expiry

Every strategyBacktest, paper gate, read date. Then live.

PythonFastAPIReact PostgresRobinhood APIPolymarket

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