LD

Selected work

Healthcare systems, applied AI, and product engineering.

Each project carries its honest build status. Where a figure appears, it is countable from source control — tests, migrations, commits. Nothing here claims a deployment or a user base it does not have.

5

Systems architected end to end

498

Automated tests

154

Database migrations authored

1,229

Commits across those systems

Flagship system

Where the workflow lives in the database

The deepest system in this portfolio: an equipment fleet platform whose 11-state lifecycle and tenant isolation are enforced in Postgres rather than in the client.

Flagship system · Live deployment
ProductionCase Study

Multi-Tenant Clinical Equipment Tracking

Running across 4 Vancouver Coastal Health sites, tracking 800+ wheelchairs and clinical assets through an 11-state lifecycle the database enforces directly — so a transition that skips a step, or a role that is not permitted to make it, simply cannot be written.

  • Live across 4 Vancouver Coastal Health sites, tracking 800+ assets
  • An 11-state request lifecycle whose transitions are gated by role in the database
  • Postgres row-level security isolating every tenant, enforced below the API
  • QR scanning driving intake, assignment, and return from the floor

React · Vite · Supabase · PostgreSQL · Row-Level Security · Edge Functions · QR workflows

Read the case study

Request lifecycle · 11 states

  1. Requested
  2. Acknowledged
  3. Searching
  4. Waiting
  5. On Hold
  6. Assigned
  7. In Use
  8. Discharged
  9. Completed
  10. Cleaning
  11. Available

Enforcement path

QR Scan
RPC
State + Audit
Tenant RLS
Dashboards

4 sites

live deployment

800+

assets tracked

11

workflow states

243

test files

Engineered systems

Regulated data, retrieval, and financial correctness

Three more systems built end to end. Each one solves a problem that a CRUD app cannot: encrypted-but-searchable identity, retrieval that refuses, and a ledger the database will not let you edit.

HEALTHCARE / REGULATED DATA

MEPP 2.0 — Equipment Provisioning

PrototypeCase Study

Provisioning system-of-record where vendors structurally cannot receive patient identity. Encrypted PHI stays searchable through a keyed blind index, and row-level security is forced at the database role.

TypeScript · PostgreSQL · Row-Level Security · AES-256-GCM · OpenAPI
APPLIED AI / CLINICAL RETRIEVAL

Clinical AI Assistant

PrototypeAI-AssistedCase Study

Retrieval-grounded clinical answers with page-level citations — and a refusal path engineered so the model says what it is missing instead of improvising from memory.

Python · LangChain · ChromaDB · OpenAI embeddings · PostgreSQL
FULL-STACK PRODUCT ENGINEERING

SpendWise

PrototypeCase StudyDemo Available

Envelope budgeting on a double-entry ledger Postgres will not let you edit — zero-sum validated at commit, with triggers forbidding UPDATE and DELETE outright.

React Native · Expo · Express · Prisma · PostgreSQL

Also built: Gemms AI Assistant — a multi-tenant retrieval widget on pgvector with an HNSW index, where tenant filtering runs before ranking rather than after. Case study not yet written.

Design studies

Systems designed, modelled, and reasoned about

Architecture and modelling exercises. These are design work with in-browser demonstrations — they are not shipped backends, and each page says so.

Clinical Risk Engine

Population-Health Intelligence Platform

Clinical GenAI Agent & Analytics Pipeline

Enterprise Healthcare Workflow Automation Engine

EquiTrackr

The earlier clinical-equipment prototype that Wheelchair Tracking grew out of.

Apex Protocol

Client & web work

Delivered for clinics and local organisations

Service work rather than product engineering — marketing and booking sites built for real businesses.

Client & Deployed Web Work

Marketing and booking sites delivered for clinics, community organisations and local business.

Website Gemms

Third-party infrastructure

Open-source platforms evaluated, not authored

Listed separately and explicitly: these are open-source codebases written by other people, assessed as a possible foundation for a clinic booking product.

Self-Hosted Healthcare Infrastructure

Evaluating open-source EMR and scheduling platforms as the foundation for a clinic booking product.

Let's build the next healthcare system.

I'm running a multi-site hospital equipment-tracking and analytics system in production, and I'm open to healthcare data, analytics, AI, and application engineering roles — remote, hybrid, or on-site. The best way in is a short conversation.

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