William Jeffries

AI consultant, founder, and independent researcher.

I build production AI systems and the tools used to evaluate them. My recent work includes agents that review medical records and search historical archives, plus experiments on agent memory and concept ablation.

William Jeffries seated at a desk in his workspace

Recent AI work

Research details

Production AI · 2024–2025

Parachute Health

Architected an agentic system that reviews medical documentation against payer rules. Built its evaluation system and AWS infrastructure.

Deployed research system · 2025–present

Józef Piłsudski Institute of America

Built a multilingual research agent over 13,000 documents and 87,000 historical page scans.

Co-founder, AI course business · 2024–present

PracticalGrowth

Built production AI pipelines for quizzes, roleplays, and other materials used across roughly 191 professional-education courses.

Experiments · 2026

Independent research

Tested how private working memory affects agent commitment and whether activation noise can train a model away from a gender shortcut.

Software clients

Engagement details