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Arbitrum Open House Singapore: Online Buildathon

Build what's next

ハッカソンの状態

終了しました

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I am preparing for Arbitrum Open House Singapore: Online Buildathon. Help me understand the rules, required developer resources, project ideas, and a 7-day preparation plan based on my HackQuest builder journey.

Arbitrum Open House Singapore: Online Buildathon
Ended

主催者

Arbitrum Foundation

ハッカソンの状態

ONLINE

エコシステム

A

実施

行動規範の閲覧(外部リンク)

外部サイトの内容は各運営者が独自に管理・責任を負います。当サイトは一切の責任を負いません。

テックスタック

Solidity
Rust

参加者

ZYR
1273+

リンク

コミュニティ

115,000 USD

報酬として使用

Overall Prize70,000 USDC
Promising Products Track15,000 USDC
Grants30,000 USDC

説明

Arbitrum Open House Singapore — Buildathon

Singapore is where ambitious startups, global capital, and Asia’s rapidly growing onchain ecosystem converge.

Arbitrum provides infrastructure trusted by institutions and used by millions.

It’s time to connect the two.

The Open House Singapore Buildathon brings three weeks of intensive building with the same technology that companies such as BlackRock and Robinhood have chosen to build on.

Three weeks to build something that matters.

DeFi. Gaming. Social applications. DePIN. Something entirely new?

That’s up to you.

Build with Stylus in familiar programming languages or use Solidity. Deploy on Arbitrum One or launch a custom Arbitrum chain.

Bring an existing project or start from scratch.

No compromises. No limits. Just build.

And there’s plenty to play for.

The top three teams will each earn a place at the in-person Founder House in Singapore: three days of intensive work alongside Arbitrum’s technical team, experienced mentors, and successful ecosystem founders.

Real mentorship, valuable connections, and a tangible path from an early idea to a fundable product.

We’ve built the infrastructure. You bring the vision.

Let’s see what happens next.

Agenda & Google Calendar
Get access to the workshops & feedback sessions by navigating to the "Workshops & Sessions" tab. Find the Buildathon schedule below.

Overall Prize

70,000 USDC

Overall Prize

First Place40,000 USDC
Second Place20,000 USDC
Third Place10,000 USDC

Overall Prize

審査員基準

Your project must be deployed on an Arbitrum chain to qualify. For example: Arbitrum Sepolia, Arbitrum One, Robinhood Chain, or others.

Projects are assessed on the following criteria:

  • Smart contract quality - code following best practices, structured logically and efficiently, with minimal security vulnerabilities

  • Product-Market Fit - projects with clear potential to attract and retain users

  • Innovation and Creativity - original approaches that push boundaries

Real Problem Solving - applications that address genuine market needs.

Extra consideration is given to projects integrating Paxos' USDG stablecoin.

Note:
At minimum, 1 of 3 prizes is reserved for a project building on Robinhood Chain
At minimum, 1 of 3 prizes is reserved for a project building on Arbitrum
All prizes are subject to development-tied milestones. Please refer to our Terms and Conditions for details.

Promising Products Track

15,000 USDC

Promising Products Track

First Place7,000 USDC
Second Place5,000 USDC
Third Place3,000 USDC

Promising Products Track

審査員基準

Your project must be deployed on an Arbitrum chain to qualify. For example: Arbitrum Sepolia, Arbitrum One, Robinhood Chain, or others.

Projects are assessed on the following criteria:

  • Smart contract quality - code following best practices, structured logically and efficiently, with minimal security vulnerabilities

  • Product-Market Fit - projects with clear potential to attract and retain users

  • Innovation and Creativity - original approaches that push boundaries

Real Problem Solving - applications that address genuine market needs.

Extra consideration is given to projects integrating Paxos' USDG stablecoin.

Note:
At minimum, 1 of 3 prizes is reserved for a project building on Robinhood Chain
At minimum, 1 of 3 prizes is reserved for a project building on Arbitrum

Grants

30,000 USDC

Up to $30k USDC in milestone-based grants for selected projects

We reserve the right to distribute milestone-based grants to selected projects on a case-by-case basis. You are not guaranteed to be selected, and we reserve the right to not select any projects for this.

Grants

審査員基準

We reserve the right to distribute milestone-based grants to select projects on a case-by-case basis. You are not guaranteed to receive a grant, and it is at the sole discretion of the Arbitrum Foundation to choose grant recipients. We reserve the right to not select any projects for grants.

免責事項:
HackQuestは、特に明記されていない限り、ハッカソンの最終審査および賞の配分には関与しません。ホストの品質基準を満たす提出物がない、または少ない場合、賞金は変更される可能性があります。

スケジュール

終了
登録
Jul 29,2026 17:01 - Oct 4,2026 15:58
終了
提出
Sep 13,2026 17:01 - Oct 4,2026 15:59
終了
報酬公告
Oct 12,2026 06:00

リソース

Resources

Developer Documentation

Hey Open House Singapore builders! We have compiled a list of useful information for you below. Please take a thorough look as most of the information you will be looking for will be covered here.

  1. Developer Docs - Get started with Arbitrum

  2. Developer Docs - Get started with Robinhood Chain

  3. A gentle introduction to Arbitrum

  4. Quickstart: Build a decentralized app (Solidity)

  5. Quickstart: write a smart contract in Rust using Stylus

  6. A gentle introduction: Stylus

  7. How to run a local Nitro dev node

  8. Quickstart: Arbitrum bridge

  9. Third party docs: RPCs, Indexers, Oracles, etc.

  10. Arbitrum FAQ

  11. Get started with ZeroDev

Faucets

Ethereum Sepolia - claim testnet ETH, then bridge it to Arbitrum Sepolia using the bridge.
https://sepoliafaucet.com/
https://arbitrum.faucet.dev/
https://www.infura.io/faucet/sepolia
https://sepolia-faucet.pk910.de/

Arbitrum Sepolia - just claim testnet ETH and you're ready to go:
https://arbitrum.faucet.dev/
https://faucet.quicknode.com/arbitrum/sepolia
https://www.l2faucet.com/arbitrum

Arbitrum Sepolia USDC Faucet:
https://faucet.circle.com/

Robinhood Chain Faucet:
https://faucet.testnet.chain.robinhood.com/

RPC Endpoints

  • https://arb1.arbitrum.io/rpc

  • https://rpc.ankr.com/arbitrum

  • https://arbitrum.llamarpc.com

Useful Tools for Builders

  • Arbitrum Docs: https://docs.arbitrum.io/

  • Arbitrum SDK: https://github.com/OffchainLabs/arbitrum-sdk

  • Stylus Docs: https://docs.arbitrum.io/stylus

  • Stylus By Example: https://stylus-by-example.org

  • Stylus CLI: https://github.com/OffchainLabs/cargo-stylus

  • Stylus Rust SDK: https://github.com/OffchainLabs/stylus-sdk-rs

  • OpenZeppelin Rust Contracts: https://github.com/OpenZeppelin/rust-contracts-stylus

  • OpenZeppelin Solidity Contracts: https://github.com/OpenZeppelin/openzeppelin-contracts