Project Sandbox
HILO, HAWAII (UTC-10)

Andrew Wessels

Full-Stack & Applied AI Engineer

Full-stack engineer by trade, tinkerer by nature, and AI whisperer by necessity.

Connect with me

Portrait with a payphone receiver, neon blue and purple light, graffiti wall behind
Years professional
16+Working across the full stack, front end through back end.
Longest tenure
10Three roles at Cro Metrics, from experiment engineer to staff to product.
Years on the web
22+Started coding for fun well before it turned into a career.
Focus areas

What I like to do

See what I build for fun

Applied AI & agents

Built "Ask Iris," an agentic chat surface embedded in a client portal, plus a Cursor extension that drives MCP servers and browser automation to build A/B experiments on its own.

  • LangChain
  • RAG
  • MCP servers
  • Claude Code
  • Agentic tooling

Experimentation & CRO

A decade of A/B testing for enterprise clients including Uber, DoorDash, Atlassian, and Ring, and the architect of OLI — the local dev, compilation, preview, and deploy pipeline behind all of it.

  • Optimizely
  • VWO
  • Convert
  • Adobe Target
  • Analytics

Full-stack product

Typed React front ends over Laravel, Node, and PHP services — auth, third-party API integrations, and the database work underneath.

  • TypeScript
  • React
  • Laravel
  • Node.js
  • PostgreSQL

Tooling & enablement

Custom ESBuild plugins, a lightweight TSX runtime, CI/CD on Workers and GitHub Actions — and the code review, mentorship, and TypeScript migration that took a platform to near-complete type safety.

  • ESBuild
  • Cloudflare Workers
  • GitHub Actions
  • Mentorship
Track record

Where I've worked

  1. Diffbot

    2026 — Present

    Senior Software Engineer (Freelance)

    Open-source integrations connecting the Knowledge Graph to LangChain and Claude Code.

  2. FunnelEnvy

    2024 — Present

    Senior Software Engineer

    Product engineering on a Laravel + React platform, plus AI-assisted browser automation for Adobe Target.

  3. Cro Metrics

    2016 — 2026

    Product Engineer · Staff Engineer · Senior A/B Experiment Engineer

    Ten years and three roles: built the experimentation infrastructure, then the AI tooling on top of it.

  4. Research Corporation of the University of Hawaii

    2010 — 2013

    Researcher / Software Developer

    Built the state's EPSCoR data collection system, then generalized it for four other states.

Education

Where I studied

  • University of Hawaii at Hilo

    2006 — 2012

    B.S. Computer Science