Marissa Posner
@ThewizardofPOS
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⭐️ Interop / Account Abstraction @ethereum | 📍NYC/TLV | Created the first Base appchain @GoldChainDev 📊 ML Engineer | 🇮🇱🇺🇸 Fencer 🤺
New York
Joined March 2011
New year new role 🚨 I’ve joined @ethereum as part of the Account & Chain Abstraction Team! This new chapter is deeply connected to a goal I’ve held: to positively impact 1 billion people in my lifetime. To me, Ethereum is the perfect place to make that happen.
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1/ Software should not wait for permission to be useful. An economy should not be trapped where it was born. This open, permissionless ethos is the heart of @ethereum, and it is the core architectural principle of elizaOS. For autonomous agents to create real value, they must
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If we collectively decide to ship FOCIL, Ethereum will make history. It will become the first L1 to rely on a committee of proposers to deliver unmatched inclusion guarantees, making it the most reliable and credibly neutral place to transact onchain. With real-time zkVMs, the
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Guys don't miss the event of the year @trustlessconf!
if you're going to @EFDevcon, i'm putting you on game: > on the 18th/19th > the @erc4337 is hosting their first @trustlessconf > to all those interop people who love interop and interop only, you should attend > if u care about the future of ethereum, you should attend > if
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@OctantApp @binance @avax @Celo @Stacks @MentoLabs Introducing @ThewizardofPOS, leading product at @ethereum. Marissa Posner is a builder and researcher at the Ethereum Foundation, working on Account Abstraction and the Ethereum Interop Layer—defining how users, wallets, and apps interact across rollups in a secure,
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The way we interact with Ethereum is evolving to become simpler, and easier for newbies to use. We present the Account Abstraction Hub, a space dedicated to exploring how this technology is being implemented today. Read on to learn more about the AA Community Hub↓
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I’m getting a lot of pushback for my support of Cuomo, the sexual harasser, so let me explain. My ancestors made a very brave decision to flee from what is now North Korea in the mid-1940s shortly after Kim Il Sung came into power in Pyongyang. They were high ranking, had a big
If you're a New Yorker, please vote for the lesser of our choice of evils: Cuomo ...
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Trustlessness is how ethereum stays incorruptible 🚀
Incorruptibility is Ethereum's most important property.
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free + censorship resistant mempool = 🔥
I'm a bit of a maximalist when it comes to preserving the core tenants of Ethereum at the protocol level. EOA wallets upgrading to AA with EIP-7702 must stay censorship resistant and decentralized I'll be speaking more about this in 30 min https://t.co/OlwmrOtR66
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trustlessness is at the heart of what makes Ethereum great @etherspot was awarded a grant from @EF_ESP to promote just that - so any wallet upgrading to 7702 can keep their users censorship resistant, just like how they already are with the EOA mempool
EIP-7702 Infrastructure is now live 🫡 Built to support Account Abstraction @erc4337 for EOAs: open, free, and censorship-resistant by using the UserOp mempool. Live on @Ethereum and @Optimism. Learn more and check out the dev docs👇 https://t.co/jvu5zOe0IT
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sAAy whAAt ethereum foundation + etherspot are building a public, censorship-resistant eip-7702 userop mempool and offering free early access at no cost to any dev or team. dm if interested! i'm gonna be knocking on your doors to help them if you don't 🖖 why: most txs now
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Public mempools matter! If your account abstraction depends on private relays, you’ve already lost trustlessness. Proud to see this launch kudos to the @etherspot team @ch4r10t33r @mm319
EIP-7702 is opening new opportunities for EOAs. Join us as we dive into what the infra enables, how it works, and where it fits in the bigger Account Abstraction picture. 👉 Set a reminder now: https://t.co/RYIDcej3qw
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See you on November 20th and get ready for an epic WalletCon 🫡
WalletCon Buenos Aires programming is LIVE. Build your day → https://t.co/xt9EXNbhc8 What’s the one session you can’t miss? Reply below & tag your +1.
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RT @ethereumfndn: App Builders at Devconnect Join us live now https://t.co/JVgScqWkOA
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1/🧵 Applications for the EF 2026 Internship Program are now open. A paid, full-time, 12-week opportunity to work directly with the teams advancing the Ethereum protocol and ecosystem.
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The more Ethereum scales, the less reason there is to live outside it. Once you can rent Ethereum’s security for pennies, running your own validator set stops making sense.
Celo and Ronin just demonstrated why every alt L1 might eventually become an Ethereum L2 Celo shut down 110 validators and cut security costs by 99.8%, from $6.9 million per year to just $13,200. Ronin paid out $35 million in staking rewards since 2023 just to maintain their
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ChatGPT Atlas just did to Google what Google did to Yahoo
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Using ChatGPT's new browser, Atlas, I am already confident that my Google search traffic is going to pretty much zero. I assume the same for other adopters. If I was Google, I would be seriously worried. https://t.co/0XGiLOI4FR
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The gap between "I'll think about it" and "I'll do it" is where most teams lose months.
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Censorship resistance is what it's all about. FOCIL For Glamsterdam
It's nice to see more people advocating for FOCIL inclusion in Glamsterdam, knowing there is a good chance it becomes too difficult to include in subsequent forks. For the record, I think it would be a pretty big mistake to gamble the censorship resistance properties of the
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