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Achievement: Pull Sharkx4Achievement: Pair Extraordinairex2Achievement: YOLOAchievement: Quickdraw

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@LoopKit @nobles-blockchain

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SwiftlyNoah/README.md

Noah Brauner

CS and Economics at Harvard, class of 2029. Founder of Appier. Game theory, quant finance, medical devices.

playredblack.com · appiertech.com · LinkedIn · nbrauner@college.harvard.edu

Appier

Branded mobile and web apps for independent schools, built on Veracross. Live at 2 schools with 5k+ daily users. One React Native and TypeScript codebase ships to iOS, Android, web and macOS, with an isolated backend per school. (Private repo.)

Red/Black

A hidden-information card game I invented, now live multiplayer at playredblack.com. Four papers: an exact count of its 2.4 × 10³³ information sets, a CFR+ solve (the algorithm behind poker solvers), and statistically tested bounds on how exploitable it is.

Papers · Play

RL against a theorem prover

Fine-tuned Qwen3-8B using the Lean 4 compiler as an exact reward, so there is no learned reward model to game. GSM8K 79.0% → 86.5% (n = 200, p = 0.0046).

Loop

Automated insulin delivery. Built Favorite Foods for Loop as a Tidepool intern, and have contributed to open-source Loop since 2022. I run it for my own type 1 diabetes. Interned on Dexcom's G7 mobile team in 2026.

Commits: tidepool-org · LoopKit/Loop · LoopKit

Also: fifth-and-flip (card-trick protocol) · PikesvilleOpportunity (econometrics paper) · HideAndCSeek50 (geolocation game) · ActivityDetector (motion classification) · NoahCoin (cryptocurrency from scratch) · TidemanVisualizer (ranked-pairs voting) · Happiness Hacker and Know Me (iOS apps)

Python TypeScript Swift C SQL · CFR+, equilibrium computation, Monte Carlo, RL

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  1. redblack-research redblack-research Public

    Four papers on Red/Black, a card game I invented: exact state enumeration, a CFR+ solve, and exploitability bounds

    TeX

  2. LoopKit/Loop LoopKit/Loop Public

    An automated insulin delivery app for iOS, built on LoopKit

    Swift 1.7k 1.4k

  3. PikesvilleOpportunity PikesvilleOpportunity Public

    Econometrics paper on opportunity and place, written for Ec 50

  4. ActivityDetector ActivityDetector Public

    Classifies movement from iPhone motion data with a neural net (97% across six activities)

    Jupyter Notebook

  5. HideAndCSeek50 HideAndCSeek50 Public

    A geolocation-based hide and seek game, inspired by Jet Lag: The Game

    Swift

  6. fifth-and-flip fifth-and-flip Public

    Four cards name the fifth. The bandwidth left over calls the coin.

    TypeScript