Marissa Posner (@ThewizardofPOS) / X

Marissa Posner

9,915 posts

Marissa Posner

@ThewizardofPOS

⭐️ Interop / Account Abstraction @ethereum | 📍NYC/TLV | Created the first Base appchain @GoldChainDev 📊 ML Engineer | 🇮🇱🇺🇸 Fencer 🤺

New York

Joined March 2011

Pinned
Marissa Posner
@ThewizardofPOS
Jan 3, 2025
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.
26K
Marissa Posner
@ThewizardofPOS
Jul 9, 2024
Replying to @mrconfino and @AmichaiStein1
Tell me again how anti Zionism isn’t antisemitism 😭
19K
Marissa Posner
@ThewizardofPOS
Sep 3, 2025
You may have heard about Ethereum Interop Layer (EIL). We’ve seen excitement building which is great, but we want to set expectations. ✨What is EIL? EIL is a trustless cross-L2 interop layer. It enables seamless, multichain transactions while keeping the user in control and
29K
Marissa Posner
@ThewizardofPOS
Oct 17, 2025
paradigm strategically aligns with paradigm to better serve paradigm through paradigm
Georgios Konstantopoulos
@gakonst
Oct 17, 2025
Excited to share that the @ithacaxyz odyssey continues at @tempo! We will accelerate Tempo’s mission towards real-world crypto adoption while further stress-testing and optimizing our existing open source stack for the entire crypto ecosystem. Thank you for the trust, onwards.
19K
Marissa Posner
@ThewizardofPOS
Feb 5, 2023
SybilShield, our hackathon project, was a finalist at the @StarkWareLtd hackathon at #ETHTLV! @bal7hazar @trangnv_ @FrancoisSchuers and I built an app for detecting & preventing Sybil attacks on Starknet. Give it a try here by inputting an address: sybilshield.fly.dev
34K
Marissa Posner
@ThewizardofPOS
Mar 5, 2020
I really appreciate how #WhiteClawFlavors is trending under "2 in NYC" on my twitter feed because obviously I care more about the new White Claw Flavors than the coronavirus spread
Marissa Posner
@ThewizardofPOS
Oct 30, 2023
Replying to @HenMazzig
I've been coming here for years. It's so sad to see that antisemitism permeates even Montauk. Jews aren't safe anywhere outside of Israel.
6.8K
Marissa Posner
@ThewizardofPOS
Nov 25, 2024
My boyfriend might break up with me but I’m still going $BLONDE @blonding_curve
6K
Marissa Posner
@ThewizardofPOS
Sep 15, 2025
Replying to @ThewizardofPOS
Trustlessness means you don’t need anyone’s permission. You don’t need to beg a relay. You don’t need to hope an admin key stays honest. You don’t need to trust vibes. Promises can break. Cryptographic rules don’t.
30K
Marissa Posner
@ThewizardofPOS
Nov 25, 2024
At $100M market cap I will go blonde @blonding_curve 👧
3.6K
Marissa Posner
@ThewizardofPOS
Jul 9, 2023
Like this tweet if you’re going to Paris for @EthCC 🇫🇷 RT if you’re going to buidl something awesome during the @ETHGlobal hackathon 👩‍💻
8.8K
Marissa Posner
@ThewizardofPOS
Feb 27, 2025
wake up world, Ethereum loading 🔁
2.1K
Marissa Posner
@ThewizardofPOS
Nov 17, 2024
Submitted my @ETHGlobal hack and that’s a wrap on this week at Devcon 🤝
2.8K
Marissa Posner
@ThewizardofPOS
Nov 13, 2025
The Trustless Manifesto is now live. Read it and sign the pledge: trustlessness.eth.limo/general/2025/1… co-authored with @VitalikButerin @yoavw We build so no one has to ask permission again 🚀
vitalik.eth
@VitalikButerin
Nov 13, 2025
Signed the trustless manifesto! trustlessness.eth.limo/general/2025/1… @ThewizardofPOS @yoavw
trustlessness.eth.limo
The Trustless Manifesto
5.2K