BWC Series 2: Social Sign-in

282 Registered Allowed team size: 1 - 4
282 Registered Allowed team size: 1 - 4

Winners are announced.

starts on:
May 22, 2023, 04:00 PM
ends on:
Jun 19, 2023, 06:59 AM



Welcome to the Build With Celo Hackathon Series!

This 4-part, monthly, virtual series is a celebration of the newest technology debuting around the Celo ecosystem. We invite developers around the globe to work with this technology to create, design, and build projects with real-world impact.

Every month comes with a new challenge, use these challenges as an opportunity to iterate and improve on your idea, bring a a new idea to reality, and have fun doing it.

In this second edition of B_WC, we invite you to BUILD Social Sign-in dApps WITH CELO, Masa, and SocialConnect

Follow us on @celodevs Twitter for updates!

Masa Repo

Masa Docs

Join Masa's Discord

SocialConnect Video Series

SocialConnect Docs

SocialConnect Website

Join Celo's Discord

Click here for more information about judging and project ideas

Listen to the Twitter Space recording!

Check out the announcement!


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Integrate social sign-in into your project using Masa’s .celo Soulnames and/or Social Connect


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Masa creates identity infrastructure for developers building web3 communities. Since launching Prosperity Passport on Celo on March 10th, 2023, over 332,000 .celo Soulnames have been minted by users. Follow simple steps below and integrate .celo Soulnames into your dApp.

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SocialConnect is a privacy-first naming service, made for phone numbers, email addresses and other social identifiers.

What can you build with Masa and Social Connect?

Here are a few examples of what you can build for this hackathon:

  • User Interface: Display a user’s soulname or phone number in your application’s UI under a user’s profile to replace their account address.
  • Community Building: Utilize soulnames and phone numbers to connect users with similar values or interests, fostering a sense of community within the Celo ecosystem.
  • User Authentication: Implement soulnames and phone numbers as an authentication method, ensuring users are genuine and not bots.
  • Sending Payments: Simplify transactions by using soulnames and phone numbers as an identifier for users, replacing the need for lengthy hexadecimal addresses.
  • Web3 Gaming: Integrate soulname and phone numbers minting and registration within web3 games, allowing players to use their social identifiers as in-game identities.
  • NFT Platforms: **Incorporate soulnames and phone numbers into NFT platforms to personalize and identify users, enhancing the trading and ownership experience.
Build Social Sign-in dApps with Celo, Masa, and SocialConnect

Delight your community with social sign-in. Use Masa’s Celo Prosperity Passport, .celo Soulnames and/or SocialConnect’s phone number name service in your app for a chance to win prizes.


Main Prizes
Masa Pool Prize (10)
USD 1000

$10,000 cUSD for 10 projects. $1000 cUSD each

SocialConnect Pool Prize (10)
USD 1000

$10,000 cUSD for 10 projects. $1000 cUSD each

Special Prizes
1st Place, Masa Soulname Integration Developer Grant
USD 3000
2nd Place. Masa Soulname Integration Developer Grant
USD 2000
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