Builder's Block #029: Pitch to 50+ Investors Through the Mentorship Program & Compete for $100K

📣 Announcements

Key updates from the Arbitrum ecosystem and Foundation.

Arbitrum Mentorship Program Cohort 2: Applications Now Open

Our mission to back founders continues with the Arbitrum Mentorship Program. Together with Robinhood Chain, we’re opening doors for teams on Arbitrum One and Rohinbood Chain to:

• Connect with investors & ecosystem partners
• Pitch at Demo Day in front of +50 investors
• Compete to win $100K in prizes

Meet the Teams Taking Home $300k at Founder House Singapore

125+ founders joined us and Robinhood Chain in Singapore to bring their products out of stealth into the programmable economy. Here are the winning teams taking home a share of the $300K prize pool:

Arbitrum One Blocks Can Now Be ZK-Proven

Arbitrum’s path to bring ZK settlement to the programmable economy: 

• Today: Mainnet block proofs  
• Next: ZK settlement and faster withdrawals 

Read more on the 2026 ZK Industry report by Succinct Labs and Zero Knowledge Podcast.

📚 Learn & Build

New learning drops and hands-on resources from across the Arbitrum ecosystem.

Building with USDG on Arbitrum

USDG by Paxos is live on Arbitrum One, integrated across GMX (markets and the GMX Dollar Vault), Morpho vaults, Fluid, Maple, Uniswap v4, and more.

𝐅𝐨𝐮𝐧𝐝𝐞𝐫 𝐇𝐨𝐮𝐬𝐞 𝐒𝐢𝐧𝐠𝐚𝐩𝐨𝐫𝐞 𝐖𝐨𝐫𝐤𝐬𝐡𝐨𝐩 𝐑𝐞𝐜𝐚𝐩

Day 1 was about proving the product deserves to exist; Day 2 focused on getting it in front of the right eyes.

Get a glimpse of our DevRel Jess's fireside chat with experts from Paxos, Pendle, and SBI Digital Markets, and hear the biggest go-to-market insights founders took away from the session. 👇

Demo: USDG Earn App on Arbitrum

Looking to integrate earning opportunities into your app? Check out this fully open-source USDG earn app example and see how you can build one on Arbitrum in just 60 seconds.

🔦 Ecosystem Highlights

Fresh launches and standout threads from around the Arbitrum ecosystem.

Introducing Mentorship Program Founder Voices

In a new series featuring alumni of the Arbitrum Mentorship Program, hear from founders who joined the program to scale their apps and find success in the programmable economy  

Featuring:

• Levy from Carbon Terminal
• Juan from Capa Finance
• Adriano from LayerV
• Romain from T3tris Finance

Build with USDG & Earn a Share of 2M ARB

Huge opportunities await teams in the programmable economy. Bring $USDG to your lending, yield, AMM, or payments app on Arbitrum and apply to the Stablecoin Growth Program.

Fhenix Mainnet is Live

The programmable economy just went confidential. Fhenix mainnet is live, bringing FHE-powered confidentiality to Arbitrum. Users can now swap transactions from public to private with Fhenix's Dual Mode.

🛠️ Dev Tooling & Infra

Updates to SDKs, CLIs, and developer workflows across the stack.

Nitro v3.12.2 is Now Fully Released

This release brings a transaction-feed client example implementation, improved handling of diverged tail groups, and greater sequencer resilience when processing delayed messages. It also fixes recent block deletion when upgrading from Nitro 3.11.x to 3.12.x.

🗓️ Events

Workshops, builder and founder support programs, and ecosystem meetups to watch.

Founder House Singapore Recap

Three days, 125+ founders, and $300K in prizes and grants.

Founder House Singapore brought together builders from around the world to level up their onchain products through expert mentorship, hands-on workshops, and a chance to compete for a share of the prize pool. 

🧵 Forum & Community Discussions

What builders are debating and proposing this week.

[Constitutional] AIP: Stylus Activation Contract

This Constitutional AIP proposes to resume Stylus contract activations on Arbitrum One following the Security Council’s pause of new activations: Security Council Emergency Action – 2/10/2026.

That’s all from Builder’s Block #029.

Thank you for reading, and keep building. Arbitrum Everywhere.