>_ hi, I'm Younes —
I'm a full-stack AI engineer with 9+ years turning ideas into production systems — across AI engineering, backend, and frontend. Currently on ALTEN's specialized AI team, delivering client-facing AI solutions end to end, from first scoping to what keeps running after launch.
Products and systems I design, build, and ship end to end — a few highlighted here, the rest live in the archive.
The platform behind this site — a single Next.js app with git-based MDX content, a scanline "membrane" home that morphs as you scroll, and an AI copilot grounded in the site's own content through a three-layer answering system.
TypeScript · Next.js · Keystatic · Tailwind CSS
A backlog maturity assessment platform that ingests story CSVs, runs structured evaluations, and surfaces run/story diagnostics through a Next.js analysis workspace.
FastAPI · SQLAlchemy · PostgreSQL · Next.js
Where I think in public — notes on AI engineering, product behavior, and the architecture decisions behind real systems.
Everything before this was proven and in production. This is the edge — two bets on what comes after naive retrieval. Recursive language models that compute over the corpus in code instead of retrieving from it, and Google's Open Knowledge Format standardizing the curated substrate. Their potential, their limits, and an honest snapshot as of mid-2026. Part eight of eight.
A mid-size industrial company, one messy corpus, forty real questions. The whole method from this series run once, in order: golden set, histogram, substrate work, typed tools, hybrid search — and an evaluation that can actually fail. Part seven of eight.
A decision framework that starts from the shape of your questions rather than the size of your corpus, the cases where the right answer is to retrieve nothing at all, and the production half nobody writes about: citations you can't fake, permissions inside retrieval, freshness, injection, and measuring retrieval separately from generation. Part six of eight.
Building an AI product? Send me the brief.
>_ Younes Lesfer · 2026