Hey Hackers, go build cool stuff

To build out the future of identity, we want to create the next generation of use cases which use Concordium’s ID layer

Mantle Mash is a 3-week online hackathon for anyone interested in building on Mantle, a new Ethereum layer-2 network with modular design, low fees, and high security. The total bounty awards for Mantle Mash is $20,000 paid in $BIT.

Algorand has partnered with Gitcoin to bring you the first of the Greenhouse Hacks series. Join us for this 4-part bounty series designed to grow new ideas from across the world.

Leading up to the holidays we are hosting our last open hackathon of the year on Gitcoin.co! Join the festivities and celebrate with us another year of buidling.

Join us as Ubeswap evolves to reach its destiny of full community control! The endgame of complete decentralization is near. Unite with other Great Ape minds at the Ubeswap Discord discussion table and share in the purple potato feast!

A hackathon for cross-chain connected applications. This hackathon is the perfect place to experiment with Connected Contracts approaches to your DApps, with guidance and mentorship from protocol experts.

We invite you to help build the future of gaming on Tezos! Block Born is launching various XTZ Bounties focused on problems that current developers in the space are looking to solve.

The Everscale Elysium hackathon will bring new developers and promising projects to the ecosystem. Seize your chance to dive into one of the most promising technologies and take your place in the cross-chain

The Social Hour hackathon is about walking the talk. It’s about disrupting the centralized services that has a firm grasp over our digital lives. It’s about transition, a transition from web2 standards to a higher dimension. It’s time for social in web3.

Our first Creator Monetization Hackathon — invites you to experiment and innovate with ideas that will allow creators in the Solana NFT space to earn royalties or identify alternative monetization models.

Reserve’s mission is to help people around the world fight inflation, and we do this by building tools for people to create and use stable currencies globally.

Join us for a 3 day in-person hackathon during Devcon week in Bogota!

Help Gitcoin protect and improve the funding of public goods

Algorand has partnered with Gitcoin to bring you the first of the Greenhouse Hacks series. Join us for this 4-part bounty series designed to grow new ideas from across the world.

I, Game & Robot" is a global Web3 Robot-vehicle customization mobile game design challenge initiated by DeAutoDAO.

The technology, the knowledge, the tooling, the legos, the friendships, the support; all of it residing within the cocoon. It’s time for metamorphosis.

It's time to DeFi conventional finance by #BUIDLing DeFi protocols, DApps and play with the token standards of the future; giving back control of money to the masses.

Build the next generation of dApps on Universal Profiles

We want to turn sustainability into a Web3 superpower, and we need your help! If you are a builder interested in laying the foundation for tomorrow’s verifiably sustainable web, come join us.

☀️ Sun’s Out, Funds Out! Come dive in to the GR14 Hackathon: ReFi Summer Edition! 🌴 Join Gitcoin’s vibrant community of more than 200,000 builders getting paid to build on open source.

Builders, designers and creators, unite! Work together with 8 prominent cultural institutions from all around the world to create the building blocks of and open source and decentralized future to empower artists & museums all over the world to enter the possibilities of Web3.

Join us to BUIDL the next generation social applications! In the two-week hackathon, we offer a variety of online workshops, grants, mentorship. Come to team up with developers, creators, and entrepreneurs worldwide. You can participate with/without coding background.

We invite you to join us in building the future of Web3, learn from online workshops, open new grants, and if you can, help fund great projects that are contributing to the public goods ecosystem. Join a sponsored hackathon and team up with new friends!

The first Celo Connect is being held in from April 4-5th in Barcelona. To celebrate, we are inviting all mobile and web3 builders to join us in person at Attico Bogatell for the Celo Connect Mobile Hackathon.

We want to invite developers to help us improve how users on Boba deploy and engage with Arweave via Bundlr.

HackAlgo is a hackathon organized by the top teams of the Algorand ecosystem. Hack Algo is the best way to join the Algorand developer community and work on the most innovative blockchain network.

The purpose of this hackathon is to challenge developers to create fun and interactive games that operate using smart contracts on Casper. There are many bounties and three different difficulty levels, for which any team or individual may attempt.

We’d like to invite you to join us to build the future of Web3, learn from online workshops, open new grants, and if you can, help fund great projects that are contributing to the public goods ecosystem. Join a sponsored hackathon and team up with new friends!

Imagine a society of a completely private digital life where your privacy is not weaponised against you just to sell you more things. Imagine a society where data is used for social good and value is distributed fairly.

Codeless Conduct is a virtual event for web3 enthusiasts from all fields and backgrounds. Participants can deep-dive into different guilds with the help of our mentors, attend various workshops, and complete no-code bounties (alone or in teams).

Arweave is back for their 6th incubation program on Gitcoin.

In this hackathon, together with partners of the Gitcoin ecosystem, we've put up prizes for the solutions society needs to network people in the spirit of the original promises of democracy, markets, and the internet.

The Grants Round 12 Hackathon is Gitcoin's fourth "Stacked Event" to support Ethereum and Web3 by building and donating.

Gaming on Tezos competition - explore the technology of Tezos, and build toys and games that delight, entertain, and help pave the way for blockchain becoming part of our everyday future.

POAPathon 2021 is focused on driving awareness, creativity and utility of the POAP toolset and community.

Algorand gaming themed exclusive

Findora is a Layer 1 protocol that uses zero-knowledge proofs, Bulletproofs, and multi-party computation to provide programmable privacy.

The Virtual Sprint to Build Governance Primitives, Powered by Leading DAO Infrastructure Providers.

Join us for 3 weeks of building new tools for DeFi and interoperability between protocols.

Arweave is back for their 5th incubation program on Gitcoin.

NFTs can be used for more than just tokenising artworks. For this hackathon, we’d like to build on the overall ecosystem forming around the concept of tokenization through NFTs.

Build powerful new applications and features on open identity and information, powered by Ceramic Network and IDX.

Casper Labs hosts their first virtual hackathon on Gitcoin!

The Grants Round 11 Hackathon is Gitcoin's third "Stacked Event" to support Ethereum and Web3 by building and donating.

Open DeFi returns for their second hackathon on Gitcoin. Build the future of DeFi!

This 3 week hackathon is focused on building with the tools needed to scale decentralized governance, DAO treasury operations, and crypto-native organizations.

Bridge the Gap is a month-long hackathon aimed to strengthen the Sperax ecosystem as a whole.

A Hackathon to bring Traditional Finance to Decentralized Finance. Over $1,000,000 in prizes and seed funding from Harmony and Prize Partners.

Celebrate Nervos' Gitcoin integration with a kickoff education and onboarding focused hackathon.

Dive into DAO x DeFi summer with ETH CC Hackathon 2021. We are excited to bring together over 150 developers, creatives, and experts to work on the future of finance in Paris!

Arweave is back for their 4th incubation program on Gitcoin.

To kickstart the integration of tez with Gitcoin, and the beginning of a new era of hackathons targeting the Tezos ecosystem, NFT me, you can DAO it a month-long virtual hackathon encourages all talented creators to help expand the NFT and DAO ecosystem on Tezos.

The Grants Round 10 Hackathon is Gitcoin's third "Stacked Event" to support Ethereum and Web3 by building and donating.

Sovryn is launching $500k worth of bounties and grants to build DeFi on Bitcoin.

As NFTs continue to surge in popularity, Zilliqa is aiming to better certain structures and functionalities on the Zilliqa blockchain to improve our community’s experience with NFTs.

Harmony brings us round 2 of ONE love back to back!

We're creating a unique collaborative opportunity for all BUIDLers in NEARverse and the wider open web universe.

Borderless, open & decentralized online coding marathon

Open DeFi is hosting their first hackathon on Gitcoin

Degen VC makes it simple and fair to launch new projects.

RSK is now fully integrated on Gitcoin, and launching this inaugural Gitcoin hackathon!

Skynet’s Spring 2021 hackathon focuses on content and media, and features 3 phases to engage developers and non-developers alike.

True to the mission of building a better world, MetaFam putting its money where its mouth is and encouraging all that is good for our closer as well as wider ecosystem!

Harmony is back with another hackathon featuring 14 new bounties.

Green NFTs - Bounties For More Ecologically Friendly NFTs (Non-fungible Tokens)

The Grants Round 9 Hackathon is Gitcoin's second "Stacked Event" to support Ethereum and Web3 by building and donating.

We are calling on all builders, designers and innovators to come help us take the Celo ecosystem to the next level.

The Open Web Foundry is a six-week programme where founders learn, build, and pitch to top-tier investors for a chance to launch an amazing new venture on Arweave.

Build on the 100% evm compatible, low cost, high performance platform - BSC.

The Baseline Protocol is a public domain open source initiative that combines advances in cryptography, messaging, and blockchain to deliver secure and private business processes at low cost via the public Ethereum Mainnet.

The first Golem Network hackathon is a one-month-long online hackathon designed to allow developers to build on top of the platform, and compete for prizes.

This hackathon is an opportunity to rally the community not just around funding projects they care about, but helping them build as well.

Hack the Horizon is a collaborative, creative, and inclusive cross-chain hackathon focused on building applications that utilize the Horizon Bridge.

Oasis invites developers from around the world to join our exciting quest to build a better, brighter future with Open Data and Open Finance!

We're excited to engage the Gitcoin developer community in our quest to accelerate network security on PoW blockchains.

With SkyDB developers can now create applications that allow for content to be edited without worrying about sending users an updated Skylink.

Conflux Network is excited to launch our first virtual hackathon Hacking Decentralized Commerce in collaboration with Gitcoin!

SGR by Sögur - previously known as Saga // SGA - is a digital coin built to provide a self-sustaining, democratic and global currency.

The East African Virtual Hackathon is a six-week virtual programming marathon for innovative young developers in Eastern Africa to design and implement block chain- based software applications in solving real world challenges on anti-corruption.

BUIDL with $XSGD-ZRC2 is StraitsX’s first Hackathon that is hosted in collaboration with Zilliqa, a high-performance, high-security blockchain platform.

Gitcoin has integrated Polkadot and Kusama tokens (DOT and KSM) into its tech stack, making us one of the first full integrations outside of the Ethereum ecosystem.

The Open Web Fellowship is a six-week programme offering an investment pool of $100,000 which will be granted to winning profit sharing communities on the Arweave network

Introducing the first open hackathon for tokenized communities.

The hackathon includes a variety of bounties on Quadratic Funding. It brings together creative companies, non-profits, governments, and individuals, who would like to incentivize more democratic public goods governance in the context of their cause.

As part of the Witnet Testnet Incentive Program, the Witnet Foundation has allocated up to 30,000 $DAI to hackers, builders and bug-hunters

Hack the Rainbow is NEAR’s first MOOH! (Massive Open Online Hackathon) and is primarily focused on building bridges between NEAR and the Ethereum ecosystems.

GoodDollar has recently launched its basic income protocol. This bug bounty challenge serves to stress-test the GoodDollar smart contracts.

Build your DApp with Cartesi - $80k+ in prizes for the top 3 projects