Didier Krux

Fullstack Web3 Developer · Ethereum Foundation, Devcon team

The web apps behind Devcon and Devconnect, the Ethereum Foundation's flagship events.

• Devcon and Devconnect websites, and the event app attendees carry on site: schedule, map, live program.
• Devconnect World Fair, Buenos Aires, November 2025: a week of real Ethereum applications, with in-person crypto payments across the venue.
• Crypto ticket payments through the pretix Ethereum payment plugin (2026).
• Ethereum adoption work with the Argentine community and the wider ecosystem.

Next.js · TypeScript · Web app · Ethereum · pretix · Ticketing

Lead Developer and Co-Founder · Bankless Academy

Free, open-source education platform onboarding people into Ethereum, lesson by lesson, quest by quest.

• Lessons as open-source Markdown compiled at build time; AI translations in 28 languages, re-run only for what changed.
• Onchain quests verified server-side: bridging, a DEX swap, an onchain vote.
• NFT badges on Base, gasless through a smart wallet and paymaster, sybil-resistant with Human Passport.
• Sign in with Ethereum with ENS, Basenames, EFP, and Farcaster profiles; a Farcaster mini app and a React SDK to embed lessons anywhere.
• Progress indexer across lessons and outside achievements; dynamic social images per learner.
• White-label version for partners; lessons built with 1inch, Optimism, Velodrome, Gitcoin, Zerion, and Rocket Pool.
• AI assistant on Discord, Telegram, and X that answers crypto questions and points to the right lesson.

Next.js · TypeScript · Chakra UI · wagmi · viem · PostgreSQL · Base · Farcaster · AI

Level 2 Contributor · BanklessDAO

Four season launch websites for BanklessDAO, and early help getting the Education and Dev guilds started.

• Season 2 to 5 launch sites, each with an interactive twist: a three.js hex shader, a rotating 3D scene, a spinning dodecahedron.

Tailwind CSS · three.js · JavaScript

Senior Software Engineer · Toasty (formerly Juven)

Video conferencing for interactive virtual meetings, and before it a business matchmaking platform driven by natural language processing.

• Toasty Virtual: admin panel, the interactive videoconference web app, and dedicated Jitsi servers on AWS with live monitoring.
• Toasty Matchmaking: admin panel, meeting scheduler, mobile web app, and a serverless matching engine scoring people with NLP.
• Technical specs, code review, UAT, deployments, and mentoring of junior developers.
• Backend structure changes that cut development time.

React · TypeScript · Redux-Saga · Node.js · WebSocket · Redis · PostgreSQL · Python · NLP · Material UI · Jitsi · AWS · Grafana · Nginx

Software Engineer · Juven

Events, memberships, and online ticketing in one platform.

• Admin panel, event discovery, and ticket purchasing.
• Dynamic image resizing on AWS with Thumbor, Lambda, and CloudFront: pages up to fifteen times faster.
• SEO and a custom analytics dashboard in Data Studio.

React · Next.js · React Native · Redux · Node.js · MySQL · Knex.js · AWS · SEO

Full Stack Developer · SdV Plurimedia

Nine years of custom CMS and websites for three of the ten biggest French newspapers, Le Parisien, Le Point, and Les Echos, read by millions every day.

• Custom CMS and front-end on large-scale infrastructure with strict quality standards.
• Single sign-on, payment gateways, the Facebook API, ElasticSearch, and years of Symfony.

PHP · Symfony · Laravel · MySQL · ElasticSearch · SSO · OAuth · Payment Gateways · jQuery · Responsive Design · SEO

Web Developer, work-study · IRCAD, WeBSurg

Websites and internal tools for a leading international medical research institute.

• Geolocation map, email filtering, and seating plans generated on the fly for surgical courses.

PHP · JavaScript · XML · Google Maps API

Web Developer Intern · IP-Media

Admin panel and Jabber server web interface for a videoconferencing product.

PHP · JavaScript · XML · Jabber

Devcon and Devconnect apps · Fullstack Web3 Developer

Devcon and Devconnect websites and the Devcon event web app for the Ethereum Foundation, with in-person crypto payments in Buenos Aires and crypto ticket payments through pretix.

Bankless Academy · Lead Developer and Co-Founder

Free, open-source web3 education platform in 28 languages: Markdown lessons compiled at build time, onchain quests, gasless NFT badges on Base with proof of personhood, an AI lesson assistant.

EthPage · Creator

Open-source ENS profile page served from IPFS, with EAS recommendations gated by EFP follows.

Onchain Quest and NewToWeb3 · Creator and developer

Web3 event platform onboarding newcomers with quests, QR check-ins, ENS subnames, EFP, EAS, and Zupass, run at NewToWeb3 and EthCC.

Onchain Summer Challenge · Hackathon project

Base Onchain Summer hackathon entry: a first onchain action in under a minute, with a smart wallet and a paymaster.

Peermatch · Hackathon project, ETHGlobal Lisbon

ETHGlobal Lisbon 2023: Optimism Silver prize, plus the Worldcoin and The Graph pool prizes.

VirtualGames · Founder and developer

Open-source online gaming platform with built-in video calls, built during the 2020 lockdown.

CoinMarketNews · Product and mobile developer

Crypto tracker for iOS and Android: 1,600 coins, news, and alerts, built in three weeks.

Pieneer · Product and developer

Interactive presentation tool: live drawing, Q&A, and polls over WebSocket, built in one week.

Digital Krux · DJ and developer

DJ podcast, seventy sets, an audio-reactive Vue player with an RSS feed.

Smart Contract Programming · Ivan on Tech Academy

Smart contracts and dApps on Ethereum, EOS, and NEM, from developer tools to testnet and mainnet deployment.

Full-time immersive coding bootcamp · Accelerate

Sixteen weeks and over a thousand hours building web and mobile apps: React, React Native, Docker, CI, and both app stores.

Blockchain Deep Fundamentals · Ivan on Tech Academy

Cryptography, Bitcoin and Ethereum fundamentals, scaling, consensus, UTXO, tokens, smart contract use cases.

Bachelor's degree in Computer Science, distributed systems design and development · IUT Robert Schuman, University of Strasbourg

Associate degree in Computer Science · IUT Robert Schuman, University of Strasbourg