Hi, I’m Quentin.

• IkitaiSince October 2026An AI app that turns screenshots and saved links into plans with friends.
• FairmintsSince 2024A platform for creating, minting and trading Bitcoin-native tokens and NFTs.
• FestCompassSince July 2026Festival discovery and schedule planning for people attending festivals in Japan.
• TapLogSince August 2026Live tap lists for Tokyo craft beer bars, with a personal log of what you’ve tried.

1. Jul 2026 – now

   Beyond Blockchain Founder and product engineer, Tokyo

   My one-person studio. I build and run Ikitai, FestCompass, TapLog and this site: Vue 3 apps for web, iOS and Android with NestJS back ends. I set up the multi-agent workflow behind them, in which Claude Code, Codex and Grok take tasks in parallel and hand work to each other through an agent network and a job board, with 15 Grok bots for research and content.

2. Oct 2024 – now

   Fairmints Founder, Tokyo

   A platform to create, mint and trade Bitcoin-native tokens and NFTs: markets, an AMM and an explorer on the Alkanes protocol, plus Counterparty (XCP) assets, in English, Japanese and Chinese. Built with Vue 3, Tailwind CSS, Three.js, NestJS, Socket.IO and bitcoinjs-lib.

3. Dec 2017 – Mar 2026

   Ownest Co-founder, CEO for its last three years, Paris

   SaaS that traced who is responsible for goods along supply chains, built on NFT-based tracking. I owned the technical architecture across Vue, NestJS and Polygon, and hired and led the product team as the company grew to 20 people, with corporate clients in France including Saint Laurent, Orange, Carrefour and Bouygues.

   

   Ownest joined Lafayette Plug and Play in 2017 and The Warehouse by Cdiscount in 2018. Customer use cases include Cdiscount parcel tracking and Saint Laurent’s transfers between warehouses, head office and stores.

   Company milestones

   • 2021From pilot to deployment. Cdiscount signed a three-year contract with Ownest to deploy parcel tracking with a scope of 2.5 million large parcels per year. Ownest’s story
   • 2021LSA Retail Tech Live. Ownest received the Transformation award for the 2020 edition, awarded in January 2021. Ownest’s story
   • 2018Recognition for Ownest. Orange Consulting TechOff jury prize, SITL Europe jury’s Coup de Cœur, and the Sirius Business Transformation award with La Poste for Easy Shopping. Ownest’s story
4. Feb 2016 – Nov 2017

   LedgysCo-founder and CEO, Paris

   Ethereum-based data sharing through decentralised marketplaces.

5. 2014 – now

   CryptoFR Founder

   A French-speaking Bitcoin and blockchain community: a Node.js forum on MongoDB and Redis, then meetups that brought the conversations into the same room.

6. Nov 2012 – Jan 2016

   AvistoWeb developer, Cachan

   Websites and web applications for clients, with Symfony, eZ Publish and jQuery Mobile.

7. Mar – Aug 2012

   CommOnEcouteWeb development intern, Paris

   The front end of a web application, in jQuery.

1. 01

   Brief

   Each task gets acceptance criteria.

2. 02

   Parallel agents

   Claude Code, Codex and Grok take separate tasks and hand work to each other through an agent network.

3. 03

   Review

   I read every diff before it merges. Agents never deploy on their own.

4. 04

   Feedback

   A recurring mistake becomes a rule in the agents’ instructions.

Ikitai reached 148 commits in its first two weeks (from its repository on 30 October 2026). The code of this site

Languages

TypeScript, JavaScript, HTML/CSS

Front end

Vue.js 3 (Composition API, Pinia, Vue Router, vue-i18n, server-side rendering), Vite, Tailwind CSS, Three.js

Back end and APIs

NestJS, Express, REST API design, TypeORM, Prisma, PostgreSQL, SQLite, Socket.IO

Mobile

Capacitor for iOS and Android apps from one Vue codebase

Testing

Jest, Vitest, Playwright

Delivery and hosting

Docker, GitHub Actions, Cloudflare, Firebase, Supabase, AWS

Internationalisation

Apps shipped in English, Japanese, Chinese and other languages

AI

Claude Code, Codex and Grok for development; Claude API and Gemini API in product features

Blockchain

Bitcoin (Counterparty, Alkanes, bitcoinjs-lib), Ethereum and Polygon, Solidity, Rust contracts

• Now

  AMF · Retail Investors Consultative Commission

  Member of the AMF’s Retail Investors Consultative Commission (Commission consultative Épargnants), representing Association CryptoFR.

  Official commission membership
• 2021

  ACPR–AMF Fintech Forum

  Represented Association CryptoFR in the working group on access to bank accounts for crypto-asset businesses.

  Working-group report
• 2019

  French National Assembly

  Represented Ownest in hearings for the fact-finding mission on virtual currencies, as listed in its January 2019 report.

  National Assembly report

• 2024

  Food, water, energy & supply chains Conversation

  An open conversation at Blockchain for Good Unconference in Brussels, recorded during EthCC.

• 2022

  Ownest on B SMART Interview · French

  Talking about Ownest on Instant Bitcoin with Nicolas Pagniez and Eva Ben-Saadi.

• 2022

  NFTs for supply chains Talk

  At EthCC[5], presenting Ownest’s approach to transferring responsibility alongside physical goods.

• 2021

  NFTs for Supplychain Article

  Why we used NFTs to track responsibility, and how the “hot potato” model works.

• 2016

  A conversation with Vitalik Buterin Interview · French

  An interview I helped conduct with Ethereum France and members of the CryptoFR community.

• 2015

  Starting CryptoFR Interview · French

  On creating a French-speaking crypto community, building the forum, and taking the conversations into meetups.

• La Chaintech

  Co-founded in June 2016 to bring together people working on blockchain in France.

  The story of the founding team

• NFT Factory Paris

  Founding member of the collective bringing together people across art, technology, and Web3.

  Meet the collective

• EDCON · Paris, 2017

  Helped the organizing team prepare the European Ethereum Development Conference in Paris in February 2017.

  Ethereum France’s event recap

• The Nakamotos Club

  Founder. A project around the original Rare Pepe Nakamoto cards: their individual histories on Bitcoin, the collectors, and the portraits that represent them.

  Visit thenakamotos.club

• Onigiri

  Smart contracts and community. The work of ONI-GIRI, a Japanese Rare Pepe artist: 9 Rare Pepes on Bitcoin in 2017, then Onigiri Pepes in 2022, 6,198 pepes on Ethereum painted in the artist’s own style. I helped build the NFT collections’ smart contracts and manage the community.

  Visit onigiri.art

• 2008–2012

  ENSEM (INP Lorraine)

  Engineer’s degree, Master’s level, in general engineering, information systems track

• Languages

  French (native) · English (business) · Japanese (studying toward JLPT N2)