Guillaume Lessard
Founder, software engineer, author and independent researcher, based in Longueuil, Québec. I design Rust/Python quantum error-correction systems, local MCP tooling, and release workflows where correctness claims are tied to declared workloads, reproducible artifacts, and public records. I build and support QECTOR independently from Longueuil.
Making sure you have the right Guillaume Lessard
It is a common Québécois name shared by several accomplished people: including a compiler engineer working on the Swift language and a real-estate executive. None of them are me, and I claim none of their work. The identifiers below are the ones I control.
| Identifier | Value |
|---|---|
| ORCID | 0009-0000-3465-3753 |
| GitHub | github.com/qectorlab |
| PyPI | qector-decoder-v3 |
| Studio | iD01t Productions, Longueuil, Québec (founded 2023) |
| itch.io | id01t.itch.io |
| [email protected] |
Background
My engineering philosophy is rooted in practical execution. Over the course of my career, I learned to build robust systems because I wanted to make things that worked in the real world. That has been the method ever since: pick the problem, learn what it requires, ship the result, publish the evidence. Over the last twenty years that has meant 167+ eBooks, 103 audiobooks, independently released desktop tools and games, and six albums plus twenty-three singles as DJ iD01T. iD01t Productions was founded in 2023 to put all of it under one roof; it is still one person.
Skills
- Systems and performance: Rust, PyO3 bindings, CUDA / OpenCL batch kernels, memory-layout and throughput tuning.
- Python engineering: Python 3.9–3.13, NumPy/SciPy, binary wheel packaging across manylinux/macOS/Windows, PyPI release engineering, sigstore attestation.
- Quantum error correction: MWPM/Blossom matching, Union-Find, belief propagation with OSD for qLDPC, Stim/Sinter/PyMatching integration, reproducible benchmark design.
- Applications and desktop: CustomTkinter GUI, self-contained runtime bundling, PyInstaller / Inno Setup / .deb packaging, Model Context Protocol servers, offline-first architecture.
- Web and product: React, TypeScript, Vite, Tailwind, structured data and SEO, Stripe commerce integration.
- Writing and publishing: technical documentation, long-form instructional writing, audiobook production, electronic music production.
Selected work
- QECTOR Decoder v3: Rust-core Python library, 17 concrete decoder configurations, first stable release v1.0.0.
- QECTOR Workbench: live Windows, Linux, and macOS — not ready yet releases, each with an 85-tool MCP server and 19 named decoder kinds.
- v1.0.0 user manual DOI 10.5281/zenodo.21611214; normative manual DOI 10.5281/zenodo.22244510; certification/proof DOI 10.5281/zenodo.22046403.
- Evidence & Provenance: validation reports and SHA-256 sealed manifests on GitHub.
- Mastering QEC and the QEC Academy instructional series; SATI CODEX and the LCL-832/833 corpora, signed through ORCID and Zenodo.
Book a 30-minute call: calendly.com/qector-info/30min · [email protected]