Marissa

@marissaposner

606 Following

3893 Followers

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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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1-20-2025 🇺🇸 As someone from DC, I’ve always felt a part of Inauguration Day and would sometimes go down to the national mall. However you feel about Trump, this is an exciting (albeit a little scary?) time for crypto. Buckle up because the next 4 years are going to be crazy 🚀

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my boyfriend made me dinner tonight which consisted of a slab of hamburger meat and rice with soy sauce 🫠 that’s what I call boy dinner 👦🏼

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Is this just a power nap then? https://x.com/solana/status/1880534255438295191?s=46

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the entire market getting rugged by the prez and his super hot wife

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are we buying $Melania or is it a scam?

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1-19-2025 💛 Today I am happy because 3 daughters were returned home to their moms after 471 days. It is truly a special moment in a country that values life over everything and will pay a steep price to save the lives of our people. May the other 94 return home 🏠

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1-18-2025 💰 The fiat financial system is broken. I literally cannot transfer money over the weekend. Crypto must solve this.

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1-17-2025 🏡 Officially signed my lease on an apartment in Tel Aviv 🎉 I found such a nice building and it has a pool which is pretty clutch when summer is 9 months a year 👙 To new beginnings 🥂

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1-16-2025 💭 I went in to our office today which I do once a week or so to be able to talk to our researchers in person. I had a bunch of meetings and I’m calling it a week! The weekend starts now 🥳

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1-15-2025 ⛓️ I spent a large chunk of my day thinking about technically how to abstract away chains from users at the protocol level. A large part of my role will be working on building and rolling out chain abstraction on Ethereum and today I got to speak to a lot of the key cross-functional players.

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1-14-2025 🔥 It's cool to work on a product where you are deeply committed to the vision. As a previous founder, it was hard for me to conceptualize working for a company. However, working for Ethereum to build a more sustainable, decentralized, and user friendly network and experience is something I am truly passionate about and lights a fire within me.

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1-13-2025 ⛓️ This is niche but TIL: I spent today learning a lot about nonces, especially 2d nonces. One of the problems with cross-chain TX is that single sequence numbers across networks make failure a nightmare. If 1 chain breaks, you have to re-sign everything. With a 2d nonce you have two dimensions of identification for transactions, rather than a single linear sequence number.

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1-12-2025 💻 👩‍💻 It is 11:24 PM and I'm still grinding on meetings 🔥 I finally feel like I can see the landscape in front of me clearly. Also I went boxing today for the first time in a while which was fun!

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1-11-2025 ⛓️ Today I looked in to cross-chain communication protocols. I deeply believe the future will be chain-less (the user won’t know what chain they are transacting on) and I’m interested in building the future to get there.

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1-10-2025 🏃🏼‍♀️ Today was a weekend day for me but also the only half day for errands in the whole week. I went to the grocery store, saw a couple apartments, went on a run, and hosted Shabbat dinner. I’m grateful for everyday views like this one 👇🏻

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1-9-2025 👏🏼 Dug deep into the weeds and got to work with some pretty cool people cross-functionally.

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The paradigm for the IDE is changing: Old IDE models show you the code + commits. New IDE models have AI create the code faster than you can track. The new models will need to have an interface that shows what is happening and the downstream impacts.

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What are your favorite protein lunch inspo ideas? I want quick + easy with a lot of protein. I'm trying to level up my protein game ☺️

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1-8-2025 🤓 I went in to the office today and it was great to talk to our researchers more in depth about the technical implementation. I usually go to the office once a week or every other week so when I do it’s like a fun field trip.

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