Builder's Block #020: Final Call for Founder House London & Why Enterprises Choose Arbitrum

📣 Announcements

Key updates from the Arbitrum ecosystem and Foundation.

Last Chance to Apply for Founder House London

Founder House starts next week from July 10-12. Selected teams will spend 3 days, in-person, to accelerate product development, refine their go-to-market strategy, and launch into the programmable economy.

Read more on what to expect during the 3-day program here

Meet the Winners of Open House London Buildathon

Over the past 3 weeks, the Open House London Buildathon brought together 782 builders and 278 project submissions across DeFi, AI, RWAs, payments, privacy, and more.
➡️ Meet the winners of the $85K prize pool

The Peanut Card is Out

The brand new physical payment card from @joinpeanut is available now - a card accepted at over 150 million Visa-accepting merchants. We're letting beta users in slowly; ArbiVerse badge holders can skip the waitlist entirely.
➡️ Not a badge holder? Join the waitlist

📚 Learn & Build

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

Arbitrum Stylus on Denaria

Denaria is building a fully onchain perpetuals trading engine. As part of its development on the Arbitrum Platform, Denaria has started implementing Arbitrum Stylus inside its trading engine to make execution more efficient and cheaper for users.
➡️ Read more on how they are using Arbtrum Stylus

WakeUp Labs: Building Production Applications with Arbitrum Stylus

As part of the Arbitrum ecosystem, WakeUp Labs are building a series of open-source production applications designed to validate Stylus through real-world implementations. This first milestone focuses on one of the most demanding application types in DeFi: DEX Aggregator.
➡️ Read the full technical write-up

An Intro to Agentic Commerce

Payments are one important part, but business relationships need rules of engagement: how to discover each other, agree on terms, handle disputes, settle payments, etc. This article covers about the evolution of online commerce and why Agentic Commerce will be relevant for your project.
➡️ Read the full article

The Enterprise Blockchain Infrastructure Stack

The programmable infrastructure conversation is shifting from experimentation to production implementation.

Financial institutions, global brands, infrastructure providers, and technology teams are looking at blockchain systems not as pilots, but as production environments that can support new markets, revenue streams, and customer experiences.
➡️ Read how Offchain is delivering the right enterprise infrastructure stack to help institutions

ETH Cluj 2026: How To Build on Arbitrum

The ETHCluj team this year hosted a full day of Arbitrum workshops as part of their dedicated Educational Track. The workshops were designed around onboarding the next wave of builders into the ecosystem and offer them a chance to learn, whether they were already familiar with blockchain technology or not.

To support continued learning, they've put together open-source materials based on the workshops.
➡️ Explore the workshop materials

How Arbitrum Adapts to AI Surge

Onchain AI agents have exploded to over 250,000 daily active instances - a 400% jump in just one year. As these autonomous agents flood blockchains with transactions, networks must evolve fast to avoid congestion and high fees.

Check out the full breakdown and how Arbitrum is tackling this head-on with Dynamic Pricing.

🔦 Ecosystem Highlights

Fresh launches and standout threads from around the Arbitrum ecosystem.

$345M in tokenized non-U.S. government debt

Arbitrum just reached $345M in tokenized non-U.S. government debt.
Institutions are bringing financial products onchain to access global liquidity, reach new markets and settle transactions instantly.
➡️ Check out the data

$300 Million Private Volume on Arbitrum

Over $300 million of tokens have been privatized using RAILGUN infrastructure on Arbitrum. Every transaction strengthens privacy on Arb.
➡️ Check out the announcement

🗓️ Events

Workshops, hackathons, and ecosystem meetups to watch.

Founder House London starts next week on July 10th

We’re excited to host the Arbitrum Founder House at Encode Hub in London, a 3 day in-person event for early stage founders & teams building their ventures on Arbitrum.
➡️ Last chance to apply here

UXmaxx Hackathon: Pushing Crypto Towards Its Current Potential

The UXMaxx Hackathon has officially kicked off. Alongside @ParticleNtwrk, Arbitrum is backing builders at the UXmaxx Hackathon to create apps where infrastructure disappears and the experience comes first.

Because the tech is there - now it just needs the UX!
➡️ It’s not too late to sign up now

Berlin Blockchain Week Recap: DFC Pitch Competition

As part of Arbitrum Founder's Eve, Arbitrum and the DeFi Founders Club hosted a startup pitching competition for teams building the future of Web3. 10 selected teams took the stage for a sharp 2-minute pitch followed by 2 minutes of Q&A in front of investors, founders, builders, and ecosystem leaders.

Check out the recap 👇

Here's one story from Berlin Blockchain Week that perfectly captures it:

🧵 Forum & Community Discussions

What builders are debating and proposing this week.

[Constitutional] AIP: ArbOS 61 Elara

Update as of June 19, 2026: Offchain Labs would like to make 2 important updates to this proposal, alongside the in-line edits to reflect these updates which include Minor version bump from ArbOS 60 to ArbOS 61 and reaffirming their decision to not activate Dynamic Pricing as part of this proposal.
➡️ Read the full proposal

ArbitrumDAO Factsheet: LG Electronics Pilots Onchain Advertising on Arbitrum

LG Electronics’ Blockchain Research Lab is piloting an onchain advertising network on Arbitrum, targeting three structural problems in digital advertising: fake traffic sometimes counted as genuine performance; privacy rules and platform changes that complicate targeting and measurement; advertising volume rising while user engagement falls.
➡️ Read the full factsheet

[Constitutional] AIP Fast Feed

This Constitutional AIP proposes to establish the Fast Feed, a paid, authenticated data streaming product for Arbitrum One. The Fast Feed allows subscribers to get updates on transactions, their relative ordering, and related transaction metadata earlier than they would otherwise via the regular feed. The Fast Feed makes that stream accessible to Arbitrum’s ecosystem as a specialized, subscription-based data product.
➡️ Read the full proposal

That’s all from Builder’s Block #020. Thank you for reading, and keep building. Arbitrum Everywhere.