wy Will Yennie
available for hire

Full-stack engineer who builds new things and fixes old things.

say hello see work →

# a fit if you're hiring for

role
full-stack, polyglot
where
Sag Harbor, NY. Onsite, hybrid, or remote; comfortable across US/EU hours
work
hard problems that reward going deep (debugging, observability, performance)
start
available now

# featured work

all projects →

Firefly

2023

Open-source observability framework for AWS Lambda serverless functions.

  • Node.js
  • OpenTelemetry
  • AWS Lambda
  • Terraform
  • Docker

Workforce

2026

A CLI that gives you a persistent roster of Claude specialists, assignable across projects, dispatchable on tickets, and runnable in parallel via git worktrees.

  • Python
  • Typer
  • claude-agent-sdk
  • Pydantic
  • asyncio

Tabletop Ledger

2025

Campaign organizer for tabletop RPG game masters: a tree of pages, plus an AI chat that takes whatever page you're on as context.

  • Ruby on Rails
  • WebSockets
  • AI APIs
  • WYSIWYG editor
Will Yennie, smiling, in glasses and a maroon sweater

# the short version

I came to engineering through Launch School's multi-year, mastery-based program. Fundamentals first (data structures, networking, REST, databases), then a capstone in system design and distributed systems.

That work became Firefly, a four-person open-source observability framework for AWS Lambda. I spent my favorite weeks on the cross-Lambda trace propagation puzzle. Most of my professional work since then has been at Insight Designs, a Boulder web agency.

Off the clock: photography, and fixing old game cartridges that have no business still working.

Currently looking. Get in touch.