Boulder, Colorado · Mechanical Engineering, CU Boulder

Ben Goldfeder

Engineer, builder, occasional card player. I make software, start small companies, and write down what I learn.

Read the writing Sit at the table

Currently

Studying mechanical engineering (quantum engineering minor) at CU Boulder and interning on the data side at Magid — time-series forecasting, Power BI, and Microsoft Fabric. On the side: running Lakeside Web Devs, co-founding EdVolution Tutors, and tinkering with machine learning for medical imaging. Former national blitz chess champion.

  • 1st, Nationals Blitz ('22)
  • Python · SQL · JS · Go
  • Forecasting · Power BI · Fabric
  • ML & medical imaging
  • Founder ×3 · tutor · TA

Latest writing

All posts →
  1. I. Building the Card Room Jun 11, 2026 What writing a poker evaluator teaches you about the rules you thought you knew
  2. II. Strategies as Data, Not Code Apr 20, 2026 A policy-as-JSON trading agent for a Jupiter bounty
  3. III. Stimulants Sep 12, 2025 Adventures with Ritalin (prescribed)

Selected work

Full portfolio →

Magid

Sales forecasting and BI for a national safety-products manufacturer — Prophet models, 16 Power BI reports, and an LLM-integrated dashboard built on Microsoft Fabric.

  • Prophet
  • Power BI
  • Fabric

ORlogic

Healthcare analytics platform that forecasts surgical volume weeks ahead. Rebuilt the public site and app interface; shipped a neural-net model that cuts OR staffing costs 2–7%.

  • Next.js
  • Neural networks
  • Healthcare

Lakeside Web Devs

Web development studio I founded — custom design, full-stack builds, and ongoing maintenance for small-business clients.

  • React
  • Full-stack
  • Founder

On GitHub

github.com/BenGoldfeder17 →

jup-policy

Policy-as-JSON trading agent for the Jupiter Developer Platform. Submission for Jupiter's 'Not Your Regular Bounty' — policies as JSON, Jupiter APIs as primitives, signing out-of-process.

TypeScript

Photographic plates

The gallery →

The card room

Sit down, you're dealt in

The full game room →

Two house games, virtual chips, no stakes. Your bankroll keeps itself in this browser.

Blackjack

dealer stands on 17 · blackjack pays 3:2

Dealer

You

Place a bet to start.

House rules: blackjack pays 3:2, dealer stands on 17 · hold 'em heads-up, blinds 5/10 · keys HSD↵ and FCBAN · play money only — if it ever stops being arithmetic, 1-800-GAMBLER.

Marginalia

After hours

The non-engineering parts of the week: a camera, a lake, and a deck of cards.

Lake fishing

Bass, mostly. Patience-based debugging. Try a cast — reflexes count when the bobber dips.

creel: 0 bass

Correspondence

Letters, work, or a seat at the table.

I'm open to freelance web work, interesting collaborations, and good conversations.

Get in touch bengoldfeder@icloud.com