Daniel Ortega

DevRel @Arbitrum 💙| Blockchain Engineer with 6+ years in Solidity & L2 | Building from spark to product | prev @cartesiproject @bancosantander

[Daniel Ortega @blockbyvlog]

https://t.co/VhGd8jRn2I

[Jess @0xjesstech]

I used AI to find TEN vulnerabilities in a security audit 🧵

Millions of dollars are being lost to hackers every week in Web3.

So I tested 3 popular AI skills on real competitive audits to see if they can actually protect founders.

The results were NOT what I expected.

The experiment:

→ Target: Real-world competitive smart contract security audits

→ Tools: 3 highly-rated AI skills

→ Goal: See if AI can genuinely assist (or even replace) a human security auditor.

The results:

[Daniel Ortega @blockbyvlog]

AI agents become much more interesting when they stop being “assistants” and start becoming service providers

Which means:
- own a job
- expose a service
- receive payment
- build a track record
- prove the quality of their work

That shift creates the need for new reputation mechanisms, service discovery, inference validation, agentic payment rails, etc, etc

[Agama @agamafinance]

Why we build with Stylus 💚

We’re building RWA-backed lending, real-world assets as collateral.

That kind of protocol can’t afford inefficiency: every loan, every liquidation, every interest accrual has to run lean and fast.

That’s why our smart contracts run with Stylus, Rust contracts on @arbitrum.

Real-world assets deserve infrastructure that’s actually built for them.

[Vik @vivaldi0x]

We built the first app that lets you travel the world by saving money

Credit cards give you points for spending

Symphony rewards you with points for saving

Earn a fixed 5% APY, plus points transferable to the largest airlines and hotels

Let your savings take you places

[Daniel Ortega @blockbyvlog]

@glirynice @hummusonrails @arbitrum Good day to build your agent with Arbitrum 😎

[Daniel Ortega @blockbyvlog]

@RobinhoodApp 💚💙

[Ben Greenberg @hummusonrails]

What if your SQL database had onchain trust built in?

.@syndicateio open sourced exactly that. Let me walk you through the @arbitrum pattern in just 4 minutes 👇

[Arbitrum Developers @ArbitrumDevs]

Builder’s Block #018 is live!

This edition covers what's next for AI: inference verification, risks, and workshops, the sub-second proof verification with Syndicate and Stylus, and the schedule and FAQs about the Open House Online Buildathon.

Dive in 👇🏻
https://t.co/A9nCkvbdxX

[Robinhood @RobinhoodApp]

The agent era is on Robinhood

[Etherealize @Etherealize_io]

Johann Kerbrat on why Robinhood is building its own L2 on Ethereum

At Consensus Hong Kong in February 2026, Robinhood launched a public testnet for Robinhood Chain, an Ethereum Layer 2 built with Arbitrum.

Following six months of private testing, Robinhood plans to launch the mainnet in 2026 and will migrate tokenized US stocks and ETFs currently offered to EU customers on Arbitrum One to its own dedicated Arbitrum-powered L2 that still settles on Ethereum.

Coinbase has adopted a similar strategy with its plans to take full control over Base’s tech stack and advance the L2 toward Stage 2 decentralization.

Robinhood Head of Crypto Johann Kerbrat explains the rationale behind building an L2:

“We can still get the security and liquidity of Ethereum, benefit from all of the work that the Arbitrum team has done, and on top of that, customize [the chain] every time we want to build something.”

He continues:

“If we want to give people access to all of the tools and elements of traditional finance, we also need flexibility [to comply with] what regulators are asking us to do. A world where you have full privacy and you can do whatever you want without KYC and trade securities is still a bit far for us. But what we are trying to find is a good middle ground. You will be on a permissionless chain. You will be able to interact with DeFi and do a lot of things with your stock tokens. We think it’s a great compromise.”

Galaxy Head of Research Alex Thorn points out that you can embed a lot of compliance controls at the application and token layers on top of Ethereum.

Source: @glxyresearch (May 2026)

[Gap | Suby @gaspardlezin]

1 year ago, we wanted to build a crypto neobank with @subyhq

(we abandoned it because we saw a wave of major players arriving and we pivoted to payment processing)

At the time, I had tested all the neobanks on the market and @BleapApp was by far the best in UX & UI of all the ones I tested, on par with Revolut & Robinhood

[Arbitrum @arbitrum]

The Arbitrum Foundation is heading to Istanbul Blockchain Week.

On June 3rd, @itsbrendanma is hosting a workshop on how institutions think about allocating capital into the infrastructure layer powering the programmable economy.

If you're in town, register below. 👇

[Daniel Ortega @blockbyvlog]

@HooCrypto me flipa la idea

[Ana Belén @anabelen_gf]

omg por fin @Bitso acepta USDC en @arbitrum 😭😭🙌🙌🙌🙌

[Ricardo "Gordon" (💙,🧡) 🇵🇹 @Ricardo__Gordon]

.@Arbitrum TVS just exploded to $20.63B 👀

A major driver?

@Rain__Protocol, now the 3rd largest prediction market.

This is what the programmable economy looks like:
• markets, liquidity, behavior → onchain
• money becoming programmable

Arbitrum is where it’s happening.

[Datawarlock 🪓 (On a Programmable Arc) @on_datawarlock]

Sending ETH on @Arbitrum almost costs nothing.

Average native token transfer fees on Arbitrum are currently around $0.000007.

On Arbitrum, the costs to transfer native tokens are now:

• ~83x cheaper than @Base
• ~367x cheaper than @Optimism
• ~2,350x cheaper than @Ethereum

As ETH transfer costs approach near-zero, programmable onchain interactions become far more scalable on @Arbitrum

[0xAllan @0x_allan]

The @CashApp crew couldn't have timed it better.

250ms blocks on @Arbitrum make the UX even better.

[Ethereum Mexico 🇲🇽 @ethereum_mexico]

Why Building your MVP with AI is not enough with Daniel from Arbitrum - AI x Blockchain Hackathon https://t.co/nkMLqSkl2E

[Ethereum Mexico 🇲🇽 @ethereum_mexico]

🚨 Workshop today! 12:00 PM (GMT-6)

Join @blockbyvlog, Developer Relations at @arbitrum Foundation, for a session on:

🎤 “Why building your MVP with AI is not enough”

See you there 👀

[Arbitrum Developers @ArbitrumDevs]

We're supporting @ParticleNtwrk's UXMaxx Hackathon starting June 22.

It's time to create consumer apps where the UX is seamless and the onboarding frictionless - because we have the technology. Sign up now: https://t.co/h0qovjdaCV