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Feb 1–28, 2026

Starknet Hackathon Re{define} Starknet Hackathon Re{define}

build privacy solutions by scaling bitcoin

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Backed by

StarkWare OpenZeppelin Xverse
1

Your Journey

1

Jan 19

Register

Sign up on DoraHacks

2

Feb 1

Start Building

Hacking period begins

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Feb 1-28

Build and Iterate

4 weeks of hacking

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Feb 28

Submit

Deadline 23:59 UTC

Mar 15

Winners Announced

Results and prizes

2

Prize Tracks

Tracks & prizes

Every track includes real project ideas for hackers, collected by Starknet Foundation, StarkWare experts, and ecosystem partners. Total prizes up to $21,500 — view the full breakdown on DoraHacks.

PRIVACY TRACK

Build privacy-preserving applications using STARKs, zero-knowledge proofs, and confidential transactions on Starknet.

Curated hacker ideas
+

PRIZES

Prizes are awarded across tracks based on impact, technical depth, and user experience.

SEE PRIZE BREAKDOWN
ZK PROTOCOL IMPLEMENTATIONS +
Implement Semaphore on Starknet
Port the Semaphore protocol to Cairo for anonymous group membership and signaling.
Build Cairo verifiers for Sigma protocols
Implement zero-knowledge Sigma protocol verifiers in Cairo.
Mental Poker implementation
Provable card shuffles under encryption, foundation for hidden-info games.
Anonymous credentials system
Prove attributes (age, membership) without revealing identity.
GAMES WITH PRIVATE STATE +
Poker / card game with hidden hands
Players cannot see each other cards, provably fair.
Strategy game with fog of war
Hidden game state between players.
Liar's poker or bluffing games
Games where lying is part of the mechanic, privacy enables fair play.
PRIVATE DEFI & COMMERCE +
Sealed-bid auction
Hidden bids until reveal, prevents front-running and bid manipulation.
Dark pool / private orderbook
Hide trade intent from front-runners, MEV protection.
Private prediction market
Hidden positions until market resolution.
PRIVATE GOVERNANCE +
Private voting system
Hide votes until tally, prove eligibility without revealing identity.
CONFIDENTIAL TRANSACTIONS +
Private payment app using Tongo
Confidential ERC20 transfers using ElGamal encryption and ZK proofs.
Shielded wallet UI
Deposit/withdraw/transfer flows using StarkWare SDK.
Privacy-first DeFi frontend
Private swaps, lending UIs.
ZK PROOF VERIFICATION +
Verify Noir proofs on Starknet
Build a ZK app in Noir, deploy verifier using Garaga.
Verify Circom/Groth16 proofs on Starknet
Port existing Circom circuits to Starknet verification.
ONBOARDING AND IDENTITY +
ZK social login dApp using Sumo Login
Onboard users with JWT proofs, no seed phrases.

BITCOIN TRACK

Create BTC-native DeFi leveraging Starknet's security.

Curated hacker ideas
+

PRIZES

Prizes are awarded across tracks based on impact, technical depth, and user experience.

SEE PRIZE BREAKDOWN
YIELD & VAULTS +
BTC yield vault
Intake BTC wrapper, borrow against it, deploy into stables, return yield.
Tokenized BTC yield representation
Create a token representing yield-bearing BTC position.
Vault curator/manager system
Curate and manage BTC vault strategies.
Leverage looping for BTC
Automated leverage strategies for BTC holders.
PRIVATE BTC DEFI +
Private BTC swap
Trade BTC without revealing amounts.
Private lending with BTC collateral
Borrow stables against BTC privately.
Private yield on BTC
Earn yield without revealing position size.
Private yield on stables
Earn yield on USDC privately.
BTC PRIMITIVES +
BTC-backed CDP
Mint stablecoins against BTC collateral.
BTC DCA (Dollar Cost Average) tool
Automated BTC purchases on Starknet.
BTC staking interface
Stake wrapped BTC and earn STRK.
INFRASTRUCTURE +
Cross-chain BTC bridge UI
Improved UX for bridging BTC to Starknet.

OPEN TRACK

Build any innovative product on Starknet. Gaming, social, payments—surprise us with real use cases.

Curated hacker ideas
+

PRIZES

Prizes are awarded across tracks based on impact, technical depth, and user experience.

SEE PRIZE BREAKDOWN
IDEA SPARKS +
Gaming
Social apps
Payments
Consumer apps
3

Social Proof

Builders Love Starknet Hackathons

What hackers love about our hackathons.

100% Virtual Up to $21.5K Prizes Open to All Levels Grant Pipeline
12+

Teams Funded

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Projects Launched

500+

Builders Supported

M
Midatopay Team
Re{solve} Winners → $25K Seed Grant → SNF Accelerator

"Participating in the hackathon was a great experience—it allowed us to validate a real idea, learn a lot in a short amount of time, and connect with strong builders."

C
ChipiPay Team
Winter 2025 Winners → Growth Grant Recipients

"Challenge yourself and participate. You nurture your competitive spirit, spend time with an excellent group of developers, and learn to build fast and solve real-life problems."

S
Starkflow Team
Re{solve} Builders

"Starknet shows what's possible when you're building on infrastructure designed for real-world performance. The native mobile SDK support and built-in scaling made the difference."

D
David
zkbadge, Re{solve} Winner

"The event greatly expanded my grasp of Starknet's architecture and tooling. Winning was extremely satisfying—developing workable solutions on cutting-edge infrastructure."

T
Troves.fi AI Team
Re{solve} Winners

"I joined to experiment and push my limits, but left with way more than expected—real learning, great feedback, and an amazing builder community. Winning felt surreal."

4

Get Started

Resources and tooling

Start with the essentials, then go deeper with verified docs, SDKs, and support channels.

Soon

Bitcoin on Starknet

Build trustless BTC bridges and OP_CAT apps

Soon

Privacy Development

Master ZK proofs and confidential transactions

Docs & tools index

Find what you need fast

Curated and verified by Starknet Foundation, StarkWare, and ecosystem partners.

Core Documentation +
OpenZeppelin Resources +
Privacy Tools +
Bitcoin and DeFi Tools +
Development Frameworks +
Workshops (Video) +
Community and Support +
5

Expert Guidance

Mentors and Judges

More mentors and judges will be announced soon

Omar Espejel - Developer Advocate

Omar Espejel

Developer Advocate

Starknet Foundation

Technical Developer Advocate at Starknet Foundation focused on privacy tech and Monero <-> Starknet atomic swaps. Hackathon lead - send questions or suggestions to Omar Espejel; former StarkWare and Hugging Face AI engineer.

Henri - Ecosystem Lead

Henri

Ecosystem Lead

Starknet Foundation

Ecosystem Lead at Starknet Foundation with a 360-degree view of ecosystem needs and progress. Expert in blockchain governance, zero-knowledge proofs, validity rollups, and BTCFi integrations like tBTC vaults.

Akash Neelesh - Ecosystem Manager

Akash Neelesh

Ecosystem Manager

StarkWare

Ecosystem Manager at StarkWare providing hands-on Cairo support and ZK proof optimization. Helps teams ship stronger DeFi, gaming, and BTCFi apps.

Benjamin Sturisky - Growth Team, DeFi Expert

Benjamin Sturisky

Growth Team, DeFi Expert

Starknet Foundation

Growth Team Lead and DeFi expert at Starknet Foundation focused on incentives, tokenomics, and crypto infrastructure. Guides projects toward sustainable economic models and growth.

Teddy - Privacy Lead, Product Team

Teddy

Privacy Lead, Product Team

Starknet Foundation

Privacy Lead on the Product Team at Starknet Foundation building core privacy tooling. Expert in confidential computing, enabling private payments and ZK-based apps.

Adrien Lacombe - Bitcoin Lead, Product Team

Adrien Lacombe

Bitcoin Lead, Product Team

Starknet Foundation

Bitcoin Lead on the Product Team at Starknet Foundation focused on BTC integrations and liquidity bridges. Works on trustless staking, BTCFi apps, and ZK-based scaling.

Jonathan Chang - Bitcoin Lead, Growth Team

Jonathan Chang

Bitcoin Lead, Growth Team

Starknet Foundation

Growth Lead at Starknet Foundation, strategizing both Bitcoin and privacy adoption while connecting projects with BTCFi opportunities. Expands the ecosystem through partnerships and growth programs.

Bitcoin Privacy DeFi General
6

Questions

FAQ

Anyone! Solo developers and teams up to 5 members. No geographic restrictions. All skill levels welcome.

Not required to start. We provide learning resources through Starknet Academy. Plus, AI tools like ChatGPT, Cursor, and Claude make writing high-quality Cairo extremely simple.

Winners can apply for seed grants up to $25K from the Starknet Foundation. Projects that continue growing successfully may qualify for additional growth grants.

Yes. Build at your own pace. Submit on DoraHacks by February 28, 2026.

All submissions via DoraHacks platform—include GitHub repo, demo video (≤3 min), and Starknet deployment link. Deadline: Feb 28, 2026, 23:59 UTC.

Join our Telegram group (t.me/+-5zNW47GSdQ1ZDkx) and ask your questions there. Our mentors and community are ready to help!

In STRK tokens within 60 days. Important: Sponsors may award $0 if no submission meets quality standards. Taxes are your responsibility. See full rules on DoraHacks.

Ready to Build?

Join the 2026 Bitcoin & Privacy Hackathon. 4 weeks. Up to $21,500 in prizes.

Register on DoraHacks →

February 1 – February 28, 2026 · Fully Virtual

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