First paid client at 16. Never stopped since: freelance, a Big Four firm, two startups.
Currently building Company OS.
contact@dev-simon.comIn short
Started young, went wide, and kept the depth most people trade for speed. No single credential here is the point. The range is. What follows is the long version.
Studied · built · won
Selected work2021 to NOW
Paid clients, real stakes. Newest first.
An operating system for running a company. It works on its own instead of waiting to be asked, and it runs on a server you control, so your company’s state stays yours.
Building the whole thing: the company-as-filesystem standard, the resident agents that work it around the clock, and the web app you steer from.
Early, and built in the open. The core loop runs end to end; next is standing it up to run a company live.
Founding Engineer and CPO.
B2B intelligence on European SMEs: search, analysis, monitoring. Goes after the European long tail that PitchBook and Bureau van Dijk under-cover.
Business-development research in finance: ~2 weeks→an afternoon.
Built a large part of it: front, back, data pipeline, AI, landing page. An agentic DeepSearch pipeline on Mastra, live conversation tracking, an internal CRM.
Took it to a live pilot with top-tier European investment-banking and private-banking teams, and pitched it at Station F. Stepped down to build something of my own.
Founded it.
Real-time coordination for hospital operating rooms. The idea: turn surgical-emergency chaos into orchestrated teams and patients.
Ran the validation: market sizing, 30+ hospital interviews, surveys I built and analysed, cold and event outreach, a team of 4.
Real need, real market, but a long road to revenue and the buyers a closed circle. Sunset it to go all-in on TailorLead. I learned more shutting it down cleanly than dragging it out.
A payroll audit engine that read the documents itself, built inside the firm.
The hard part was the documents: heavy processing and data extraction, mostly Python and OCR.
Won their internal hackathon, which got me invited onto the mission as a paid engagement.
Earlier
Right hand to the CTO, owned the entire technical scope end to end.
Full project lifecycle for local businesses, on time and on budget.
StudyingÉcole 42 Paris: systems, C/C++, top 3%. · M2 LEAD, Paris-Saclay, a 360° startup training: legal, finance, operations, team.
What I do
I know how Netflix’s bytes find your couch at 2 a.m.
C and C++, manual memory, raw threads, the École 42 way. I built my own shell and a raytracer from the math up.
I take it from zero to production.
Front, back, data, DevOps, security. Building Company OS end to end.
I make the model do the boring part.
Agent pipelines, RAG, eval loops. Building Company OS on agents that run on their own; an autonomous DeepSearch on Mastra before that.
I have taste.
Interfaces that disappear when they work. This site is one of them.
I’ve pitched it, sold it, led the team.
30+ hospital interviews, a team of 4, pitched at VivaTech and Station F. I’ve run the non-engineering half too.
I win when it’s timed.
A clock is its own skill. The EY win turned into a paid mission.
What I build with
Ambition
I’m early, and I don’t pretend to have it figured out. I’ve just refused to stop building. Every year stacks another layer the last one couldn’t reach. The base is unusually deep for where I am, and it compounds. I want to put it somewhere that moves fast, around people better than me, at the edge of what’s being built.
Contact
Off the clock
The same all-in when no one’s paying me to be. 50K+ trail ultras, a regional chess title at eleven, plus the hours I put into staying fit and reading. The range isn’t only professional.
The other ledger →
