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.

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

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10 min readHealthcare integration

Stop Polling the EHR: FHIR Subscriptions and Event-Driven AI Agents

Wake healthcare AI agents on EHR event notifications: FHIR Subscriptions, webhooks or HL7v2, id-only payloads, gap detection, debounce and audit.

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Latest writing

All 96 articles →
  1. Snowflake, graphsAI Business Process Mapping Should Output a Graph, Not a Diagram
  2. LLMs, agents, evalsAI Forward Deployed Engineer Agent: Its Riskiest Output Is a Default
  3. HL7, FHIR, MirthIs Text Messaging HIPAA Compliant? Only With a Gate Before send()
  4. HL7, FHIR, MirthLLM Decision Support Without Alert Fatigue: Make the Hook Say Nothing
  5. LLMs, agents, evalsAI Draft Replies to Patient Messages: Route, Ground, Measure

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