--- title: CV date: 2026-09-02 lang: en-US author: Julien Béranger model: Claude Opus 5 source: https://julienberanger.com/cv-sept-2-2026 --- # CV **Smart Contract & Full-Stack Engineer — AI / LLM integrations** Montpellier, France · [julien@strat.cc](mailto:julien@strat.cc) · +33 6 30 90 54 48 [julienberanger.com](https://julienberanger.com) · [GitHub](https://github.com/julienbrg) · [LinkedIn](https://www.linkedin.com/in/julienberanger/) · [X](https://twitter.com/julienbrg) · [Farcaster](https://warpcast.com/julien-) · [Telegram](https://t.me/julienbrg) · [Element](https://matrix.to/#/@julienbrg:matrix.org) Senior full-stack developer with 6+ years in production — [TypeScript](https://www.typescriptlang.org/), [React](https://react.dev/)/[Next.js](https://nextjs.org/), [Node.js](https://nodejs.org/en), REST APIs, CI/CD, and LLM integrations. I build complex business interfaces, data pipelines, and AI features — and I teach people how to do the same. Working languages: English, French, Chinese. --- ## Core Skills ### Languages & Frameworks [Solidity](https://docs.soliditylang.org/), [Node.js](https://nodejs.org/en), [TypeScript](https://www.typescriptlang.org/), [React](https://react.dev/), [Next.js](https://nextjs.org/), [Nest.js](https://nestjs.com/) ### AI & LLM Agentic [RAG](https://github.com/w3hc/rukh) systems, multi-model orchestration ([Claude](https://www.anthropic.com/claude), [ChatGPT](https://openai.com/), [Mistral](https://mistral.ai/)), LLM fine-tuning, [Anthropic API](https://docs.anthropic.com/) integrations, [Claude Code](https://www.anthropic.com/claude-code) and LLM dev tooling ([Zhankai](https://github.com/w3hc/zhankai)), prompt and context engineering for production business workflows ### Web3 [Hardhat](https://hardhat.org/), [Foundry](https://book.getfoundry.sh/), [Ethers](https://docs.ethers.org/v6/), [Viem](https://viem.sh/), [Wagmi](https://wagmi.sh/), [Reown](https://reown.com/), [OpenZeppelin](https://www.openzeppelin.com/solidity-contracts) ### Zero-Knowledge Privacy-preserving Web3 design, proof verification workflows, Rate-Limit Nullifiers ([ZK API](https://github.com/w3hc/zk-api)) ### Developer Relations & Training Technical docs, app examples, tutorials, live coding, workshops, hackathon mentoring, cohort facilitation in English ### Engineering Practices [Git](https://git-scm.com/), CI/CD, [Jest](https://jestjs.io/), DevOps, [Docker](https://www.docker.com/) --- ## Career Summary ### CEO & Lead Developer — [Strat](https://strat.cc/) *2020 – Present · Montpellier, France* - Built an AI quoting assistant for [Batappli](https://www.batappli.fr/) ([Systemlog](https://www.systemlog.fr/), 5k+ MAU): tradespeople describe a job in a few words and get a ready-to-send quote in seconds. Shipping to production. - Built a report-drafting tool for a partner running nursing-home compliance inspections — turning hours of manual writing into a guided, structured workflow. - Delivered a custom RAG system for [Systemlog](https://www.systemlog.fr/). - Built an NFT registry for [AFNIC](https://www.afnic.fr/), the institution managing 4 million `.fr` domains. - Developed multiple Web3 projects for [Kleros](https://kleros.io/) and Hexarchia. - Organised Web3 hackathons for [UNESCO](https://www.unesco.org/) and [Université Paris 8](https://www.univ-paris8.fr/). - Trained students at [Epitech Digital School](https://www.epitech.eu/), [STUDI](https://www.studi.com/), and [emlyon business school](https://em-lyon.com/). - Won 1st Prize at the [DAO Global Hackathon](https://daoglobalhackathon.com/past-hackathons) 2022 ([Core DAO](https://coredao.org/) tech track). ### Co-founder & Lead Developer — [W3HC (Web3 Hackers Collective)](https://github.com/w3hc) *Feb 2023 – Present* - Designed and built [Rukh](https://github.com/w3hc/rukh), a Nest.js agentic RAG API with per-session model selection (Claude, ChatGPT, Mistral) and persistent context — [live API](https://rukh.w3hc.org/), [demo video](https://youtu.be/5YDAfwaddNI). - Built [Zhankai](https://github.com/w3hc/zhankai), a CLI that turns any repo into structured markdown for LLM processing — [300+ downloads/month on npm](https://www.npmjs.com/package/zhankai), [demo](https://youtu.be/kdNZEml9Vns). - Created [w3pk](https://github.com/w3hc/w3pk), a passwordless Web3 authentication SDK with encrypted self-custodial wallets — [site](https://w3pk.w3hc.org/), [docs](https://w3pk.w3hc.org/docs#quick-start), [npm](https://www.npmjs.com/package/w3pk). - Implemented [ZK API](https://github.com/w3hc/zk-api), anonymous API access to LLMs using zero-knowledge proofs (TypeScript implementation of the Crapis–Buterin proposal). - Developed [Gov](https://github.com/w3hc/gov), an on-chain voting system for everyday people — [cross-chain contracts](https://github.com/w3hc/gov-crosschain), [docs](https://w3hc.github.io/gov-docs/), [deployer app](https://gov-deployer.netlify.app/). - Implemented the [game of Go in Solidity](https://github.com/julienbrg/game-of-go) — [live demo](https://go-onchain.netlify.app/). ### Developer Relations Engineer — [Arthera](https://www.arthera.net/) *Jul 2023 – Dec 2023* - Wrote the [technical documentation](https://docs.arthera.net/), guides, tutorials, and app examples. - Led technical support online and during hackathons. - Supported partners in integrating the product. - Organised a 150+ attendee event during [EthCC 2023](https://ethcc.io/) in Paris. - Improved the core product: load testing, upgradeable system contracts. ### Developer Relations Engineer — [Aurora Labs](https://aurora.dev/) *Sep 2022 – Dec 2022* - Wrote the technical documentation, guides, tutorials, and app examples. - Led technical support online and during hackathons. ### CEO & CTO — Āto *2020 – 2022* - Designed an IP-licensing product for NFTs in collaboration with an intellectual property lawyer — [demo video](https://www.youtube.com/watch?v=LcGz6WcmZjM), [GitHub org](https://github.com/orgs/ATO-nft). - Contributed to [EIP-5560: Redeemable NFTs](https://eips.ethereum.org/EIPS/eip-5560). - Managed a remote team of six developers. - Built NFTs, an [NFT marketplace template](https://github.com/ATO-nft/nft-deep-wire), and a [live auction service](https://github.com/ATO-nft/auction-app) in Solidity and React. Worked with authors, auction houses, and fine art galleries. ### Head of Communications — [iExec](https://iex.ec/) *2016 – 2019* - Led the ICO, raising 10,000 BTC in under 3 hours. - Grew the Twitter account from 0 to 30k followers in a few months. - Organised 200+ attendee events during Devcon Prague. ### Customer Support Manager — [OpenClassrooms](https://openclassrooms.com/) *2014 – 2016* - Built the customer service function from the ground up, handling over 1,000 requests weekly. ### Chinese Teacher — French National Education *2008 – 2013* - Taught students from CEFR level A1 to B2. --- ## Teaching & Enablement - **Cohort training:** [Epitech Digital School](https://www.epitech.eu/), [STUDI](https://www.studi.com/), [emlyon business school](https://em-lyon.com/) — technical and non-technical audiences. - **Workshops & hackathons:** organised and mentored events for [UNESCO](https://www.unesco.org/), [Université Paris 8](https://www.univ-paris8.fr/), and [EthCC 2023](https://ethcc.io/) (150+ attendees). - **Developer relations:** documentation, tutorials, app examples, live coding, and online support at [Arthera](https://docs.arthera.net/) and [Aurora Labs](https://aurora.dev/). - **Classroom experience:** five years teaching Chinese in the French national education system. - **Delivery languages:** English (bilingual), French (native), Chinese. --- ## Selected Projects ### [Rukh](https://github.com/w3hc/rukh) — agentic RAG API Modular AI framework with a RAG system supporting multiple LLMs and personalised contexts. Pick your model per session, keep context across sessions. [Live API](https://rukh.w3hc.org/) · [Assistant demo](https://julienberanger.com/chat) ### [Zhankai](https://github.com/w3hc/zhankai) — LLM dev tooling CLI that converts a repository into a structured markdown file for LLM processing. [npm](https://www.npmjs.com/package/zhankai) · [Demo video](https://youtu.be/kdNZEml9Vns) ### [w3pk](https://github.com/w3hc/w3pk) — passwordless Web3 auth SDK WebAuthn-based self-custodial wallets, no seed phrases, with stealth addresses and ZK primitives. [Site](https://w3pk.w3hc.org/) · [Docs](https://w3pk.w3hc.org/docs#quick-start) · [npm](https://www.npmjs.com/package/w3pk) · [Next.js starter](https://genji.w3hc.org/) ### [ZK API](https://github.com/w3hc/zk-api) — anonymous LLM access Prepaid, ZK-proof-backed anonymous access to AI models using Rate-Limit Nullifiers. ### [Affix](https://affix.w3hc.org/) — on-chain document authentication Anchor document hashes on-chain so anyone can verify a document is genuine and unaltered, without changing existing workflows. [UI](https://github.com/julienbrg/affix-ui) · [Contracts](https://github.com/julienbrg/affix-contracts) · [Demo video](https://www.youtube.com/watch?v=XoquF4TzP54) ### [Gov](https://github.com/w3hc/gov) — on-chain governance Voting and proposal tooling for real groups, not just DAOs. [Cross-chain](https://github.com/w3hc/gov-crosschain) · [Docs](https://w3hc.github.io/gov-docs/) · [Deployer](https://gov-deployer.netlify.app/) ### [Shebam](https://shebam.w3hc.org/) — regulated on-chain Euro payments Payments settled in EURe via Safe — faster and cheaper than card rails, fully auditable. [GitHub](https://github.com/w3hc/shebam) ### [Avventura](https://avventura.fun/) — AI-driven Web3 RPG Text-based RPG where choices, assets, and progress live on-chain, with LLM-powered storytelling. [GitHub](https://github.com/w3hc/avventura-v3) ### [Wulong](https://github.com/w3hc/wulong) — confidential API Nest.js API running inside a TEE with ML-KEM-1024 encryption and SIWE authentication. --- ## Awards & Recognition - **[Optimism RetroPGF Round 3](https://vote.optimism.io/retropgf/3?search=gov)** — funding recipient for [Gov](https://github.com/w3hc/gov), recognising its contribution to public goods. - **[DAO Global Hackathon](https://daoglobalhackathon.com/past-hackathons) — 1st Prize** ([Core DAO](https://coredao.org/) tech track). - **[GitHub](https://github.com/julienbrg)** — 171 repositories, Arctic Code Vault Contributor. --- ## Education - **Degree in Chinese Studies** (Philosophy, Literature and Arts) — [INALCO](https://www.inalco.fr/), National Institute for Oriental Languages and Civilizations, Paris, 2007. --- ## Languages English (bilingual) · French (native) · Chinese