Engineer in the Loop, San Francisco

Human in the loop. Build tech to survive first contact.

I did time at FAANGs as a SWE and then Forward Deploy Engineer / Partner Engineer, a recent stint in VC, some stealthy startup time. Now I build apps with my AI interns, with a lot of quality checks. I'm the engineer who groks the business. Ship the thing that moves the number.

Currently Working on Python LoopGate Harness

Recent Projects

Demo forecast accuracy and prediction interval coverage
Python · Machine learning

Retail Demand Forecasting

Three models compete in a custom evaluation harness. The winner drives inventory recommendations, with monitoring and a reproducible notebook. Built in under seven days with my own Python harness.

AI Deployment Calculator project thumbnail
Web app

AI Deployment Calculator

Estimates VRAM and recommends GPUs for inference, embeddings, vision, image diffusion, and fine-tuning based on task, model size, quantization and batching.

LoopGate Harness thumbnail
RXDT Labs

LoopGate

Verification infrastructure for AI coding agents. LoopGate runs agent-written code through repo-specific checks before accepting output.

Browser windows passing through violet quality gates with an amber JS tile
Frontend developer tool

LoopGate JS

Gates for the browser, not just the build. A TypeScript frontend harness for coding agents. This site itself was built using loopgate_js.

Web app

Comfyday

For teens, for fun. A tiny weather-to-outfit app for what to wear today. Enter a ZIP code, check weather, get a weather-specific outfit.

VC experience from a systems engineer
Business Acumen

VC

The times I use my tech skills on the dark side.

Rent or Own Proprietor Thumbnail
Classic Full Stack Web App

Rent or Own

A quick attempt to answer the forever debate, rent or own?

What I Care About

Thoughtful adoption, not hype. Minimalism, not line count. Evidence, not guesses. And moves regardless of the crowd. Curious about: AHI (agent-human-interaction), the evolution of evaluations, and the practical mess of using AI to build.

Loops Everything comes full circle. Fresh context, clear specs, commiting, and quality. In life and in code.
Evaluation that bites Measure the path, audit the source, and treat confident wrongness as worse than refusing to guess.
Practicality Elegance in less. Clear interfaces. And enough empathy that the next human gets it.

Find Me

repos and writeups

Portrait of Rox dT