hi, I'm Clint.

I build products.

I write down what I learn building them: healthcare integration, applied LLMs, and leading the teams behind it. Twelve years of it, mostly in Nashville, usually with espresso.

Clint Johnson with family on a golf course tee box in Bloomfield Hills, Michigan, 2024
4 Generations · Bloomfield Hills, MI · 2024
MetaCaddieTue · Nov 17

A caddie that
speaks first.

It reads the hole, the wind and your own game, then tells you the club and the target out loud, in the voice of the caddie you pick.

iPhone · Apple Watch · Ray-Ban Meta (Android coming)

Try the betaSee how it works
MetaCaddie on a par 3: a satellite view of the hole with the aim line, the club and the shot dispersion

fresh off the desk →

9 min readHealthcare integration

AI Patient Matching in an EMPI: The LLM Explains Uncertain Pairs, Humans Merge

How to use AI for EMPI patient matching: deterministic scoring, an LLM that only explains uncertain pairs, and reviewed, reversible FHIR links.

Read it →

Latest writing

All 99 articles →
  1. HL7, FHIR, MirthAI Agent Audit Log in FHIR: AuditEvent and Provenance That Name the Agent
  2. HL7, FHIR, MirthLLM LOINC Mapping: Make the Model Pick, Not Remember
  3. HL7, FHIR, MirthStop Polling the EHR: FHIR Subscriptions and Event-Driven AI Agents
  4. Snowflake, graphsAI Business Process Mapping Should Output a Graph, Not a Diagram
  5. LLMs, agents, evalsAI Forward Deployed Engineer Agent: Its Riskiest Output Is a Default

Where to start

pick the one that sounds like you, read them in order

You work in healthcare tech

  1. Healthcare Integration For Beginners: HL7v2
  2. Mirth Connect: Part 1 - Getting Started with 🐳 Docker
  3. HIPAA Consent: What Engineers Actually Need to Know

You build with LLMs

  1. Table Stakes for Pragmatic Development Using LLMs
  2. What an AI Audit Actually Finds
  3. Your Support Team Is Claude Code on a Timer

You lead engineers

  1. Staff Engineer Layoff Survival Guide: Lessons from 2008, 2020, 2023 — and Now
  2. The Food Truck Method: Building MVPs That Don't Suck
  3. The Death of Institutional Memory: Why I'm Building Atlas (And Why It Matters)

Series

HL7 & Mirth from zero
  1. 1/3Healthcare Integration For Beginners: HL7v2
  2. 2/3Mirth Connect: Part 1 - Getting Started with 🐳 Docker
  3. 3/3Mirth Connect: Part 2 - Adding 🐰RabbitMQ
Shipping LLMs in production
  1. 1/3Table Stakes for Pragmatic Development Using LLMs
  2. 2/3What an AI Audit Actually Finds
  3. 3/3Your Support Team Is Claude Code on a Timer
React state, then and now
  1. 1/2React State Management & Clean SPA Architecture
  2. 2/2React Tooling 2024: Stop Using the Wrong Shit
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