Monad Blitz Paris: 19 Projects Shipped in 12 Hours
On Saturday, September 19, DeVinci Blockchain hosted Monad Blitz Paris on the Pôle Léonard de Vinci campus, with the Monad Foundation as co-host. It was the first Paris edition of Monad Blitz, the one-day, in-person hackathon format held in cities such as New York, Denver, Seoul and Lisbon. Over 50 builders took part, and 19 projects were shipped between 9 am and 9 pm.
The Paris edition was agreed with the Monad team in June 2026 at Monad Blitz NYC, where DVB members were building. DeVinci Blockchain then ran the day end to end, from the briefing and the Monad 101 workshop to the vote and the awards. About three in four builders were students, and six in ten were building on Monad for the first time. The Blitz also closed the third DVB Student Cohort, whose participants had spent the Friday on beginner talks and workshops.
Monad is an EVM-compatible layer 1 blockchain that executes transactions in parallel. Its documentation lists a 300 ms block frequency and 600 ms finality. Builders write Solidity with the usual Ethereum tooling, and blocks are short enough for an on-chain action to feel almost instant.
How a Blitz works
Teams have at most four members, and every project must be new: no existing codebase, and no code written before the day. The rules ask each team to submit a public GitHub repository, started as a fork of the official monad-blitz-paris starter repo, and to deploy the project on Monad testnet.
Each team then gave a three-minute demo. Participants voted during the pitches and for 15 minutes after the last one. The Paris edition used a capital-allocation vote, in which each voter splits a fictional budget between the projects they back. The guidelines favor new ideas and original mechanics over polish.
The Monad Foundation funded $3,000 in prizes: $1,500, $1,000 and $500 for the top three.
Meet the winners
1st place: Street Aura
Hugo Thomas, Lancelot Watelle, Clément Darmon
Street Aura is an on-chain "aura battle" between two brainrot characters, played by the whole room from their phones. Players stake MON into a vault, join a random team, earn points in 10-second mini-games and spend them on emotes that drain the other team's aura bar. Every emote is a real Monad transaction.
There is no game server: the big screen and every phone read the same contract events, so everyone sees the same fight. Session keys let players sign once when they join instead of approving each emote. When a bar hits zero, the winners split the losing team's stakes, and each draws an NFT card that gets rarer the more they took part. Hundreds of transactions land in about 90 seconds of combat.
2nd place: Aura Farming
Noémie Flament, Nathan Levy, Ilan Martin
Aura Farming built an app for rating playful videos, deployed like every Blitz project on Monad testnet.
3rd place: FUSÉE
Eden Baudin
FUSÉE is a mobile rocket crash game: bet, watch the rocket climb, cash out before it explodes. There is no wallet to connect, since the first visit creates one in the browser and tops it up with test MON for gas and 1,000 test USDC. Each flight takes two on-chain transactions, sent with eth_sendRawTransactionSync, which returns the receipt in a single round trip, so a tap is confirmed in about half a second. Clips of the rapper Kaaris and other French memes react to every flight.
GitHub: edenbd1/jetx-monad
Jury favorites: a trip to Lisbon
Alongside the podium, DeVinci Blockchain named two jury favorites, Monad Murder and Bric à Brac. Both teams win a trip to Lisbon for HackMeridian, the Stellar hackathon taking place on October 25 and 26, just before the Meridian conference.
Monad Murder
Fabien Chevallereau
Monad Murder is a murder mystery game on Monad testnet. Players investigate a crime scene and collect clues, then lock in a hidden accusation through a commit-reveal scheme, so nobody can see or copy it before it is revealed on-chain. The smart contract generates the solution and checks whether each revealed accusation is correct.
GitHub: lelegendaire/monad-murder
Bric à Brac
Gaspard Tanguy, Boris Danailov
Bric à Brac turns an ordinary room into an absurd live auction. A phone films the room, an AI model recognizes everyday objects, and a selection of them goes on sale as collector's pieces while the audience follows the stream on their phones. Prices fall over time, so waiting makes a lot cheaper, but the first accepted purchase wins. The contract computes the price whenever it is read, so no bot has to lower it, and only test MON with no value changes hands.
GitHub: boris94300/monad-blitz-G-B
What the teams built
More than half of the 19 submissions were games, several of them built for the whole room at once: a 2,304-cell canvas repainted live, a fare-dodging party game on the RER B line, an arcade race that spectators boost from their phones. Some teams also took the wallet out of the way by generating and funding a throwaway wallet in the browser, so players never had to install an extension or see a gas fee.
For DeVinci Blockchain, the Blitz brought an international hackathon format to its own campus, so students could take part without traveling. The two jury favorites head to Lisbon at the end of October.
Co-hosted by DeVinci Blockchain and the Monad Foundation.