Geoffrey Heckmann.Geoffrey Heckmann.Geoffrey Heckmann.

03Stack

Everything I can actually operate.

Every capability I have, worth up to five skill points and laid out the way it was learned: a cell opens once a neighbour in its own discipline has a point in it. Nothing can be driven past what has actually shipped — the cells that stop short say so on the rim.

• Leadership & Product: Four CTO seats. The part that does not compile.
  • Technical strategy & roadmap — 5 of 5 skill points — shipped in production. Twelve years of deciding what not to build.
  • Architecture review & due diligence — 5 of 5 skill points — shipped in production. Reading someone else's system before money moves.
  • Hiring & engineering culture — 4 of 5 skill points — shipped in production. Teams built from zero, twice over.
  • Team leadership · 4 CTO seats — 5 of 5 skill points — shipped in production. Objectify, Ternoa, ViVoka, Meria.
  • Product direction — 4 of 5 skill points — shipped in production. Roadmaps that survive contact with users.
  • Founder & board alignment — 4 of 5 skill points — shipped in production. Translating engineering reality upward.
• Frontend & Creative Coding: Where the machine gets a face.
  • TypeScript · React · Next.js — 5 of 5 skill points — shipped in production. The daily instrument. App Router, RSC, the lot.
  • Three.js · React Three Fiber — 4 of 5 skill points — shipped in production. Every 3D object on this page.
  • GLSL shaders · procedural geometry — 4 of 5 skill points — shipped in production. Nothing here is a texture file.
  • Simulation & motion design — 4 of 5 skill points — shipped in production. Motion derived, not keyframed.
  • Tailwind · design systems — 4 of 5 skill points — shipped in production. Tokens first, components second.
  • React Native · Unity · C# — 3 of 5 skill points — shipped in production. Shipped mobile and real-time before the web caught up.
• Backend & Infrastructure: The part nobody sees until it stops.
  • Node · Python · Rust · C/C++ — 4 of 5 skill points — shipped in production. Down to the metal when the metal is the problem.
  • Postgres · MongoDB · Redis — 4 of 5 skill points — shipped in production. Schema design, migrations, the cost of both.
  • REST · GraphQL · RPC — 4 of 5 skill points — shipped in production. Contracts that outlive their authors.
  • Vercel · GCP · Cloudflare · Supabase — 4 of 5 skill points — shipped in production. Deployed, metered, and paid for.
  • Observability · Sentry · PostHog — 3 of 5 skill points — shipped in production. You cannot run what you cannot see.
• AI: One genuine credential, and a deliberate rebuild.
  • Voice AI SDK · shipped, 4 years — 4 of 5 skill points — shipped in production. ViVoka. Four years, in production, on device.
  • Applied ML product leadership — 4 of 5 skill points — shipped in production. Scoping what a model is actually allowed to decide.
  • LLM app integration — 3 of 5 skill points — in build. In build — shipped internally, not yet for a client.
  • RAG · embeddings · vector stores — 2 of 5 skill points — in build. In build — retrieval quality is the whole game.
  • Agentic tooling · MCP — 2 of 5 skill points — in build. In build — tools, not chat.
  • Evals & prompt workflow — 2 of 5 skill points — in build. In build — the only honest way to claim the rest.
• Web3: History, not identity. Still load-bearing.
  • Solidity · smart-contract architecture — 5 of 5 skill points — shipped in production. Contracts in production holding real assets.
  • EVM chains · Viem · Ethers — 4 of 5 skill points — shipped in production. Mainnet, L2s, and the gas bills.
  • Substrate · Rust chains — 4 of 5 skill points — shipped in production. An L1 in Polkadot, from inception to launch.
  • Audits & security review — 4 of 5 skill points — shipped in production. Commissioned them, answered them, fixed them.