Marissa

@marissaposner

627 Following

2503 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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5-1-2025 🇮🇱 Happy birthday Israel ✨ Israeli Independence Day in full force 🩵 I celebrated with a barbecue and sunset party by the beach 🏖️

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4-30-2025 💻 Nothing like a near death experience to make you be productive lol 😂 grinded it out today and got it done 💪🏼 I worked on a technical analysis of something new we are working on. It was fun diving so deep and learned a ton 🤓

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What are the best miniapps for cross-chain execution of swaps, actions, etc?

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4-29-2025 😢 My heart still is beating fast from what happened earlier. It is Memorial Day in Israel and I went to a memorial service for the fallen at a central square outside. We had a 1 minute siren all across the country to commemorate the lives lost. We resumed the service with stories of those lost. All of the sudden, we heard what sounded like shots. Everyone started running towards the exits which they had made out of barricades. There weren’t enough exits and people started trampling each other. We got out and helped a couple people up. Many of my friends lost their shoes and we ran all the way home, some of them without their shoes. In the end, they had arrested someone suspicious but there was no attack. The community is so on edge here and ready to react in a moments notice. It was a life flashes before your eyes moment and I’m grateful that I’m okay and safe at home 🏠

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4-28-2025 👩‍🍳 Met in the office today and worked on some architecture diagrams. Chefs are cooking!

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4-27-2025 📝 Worked on some of the architecture for a new system we are building out. And wrote a bit for a new article I’m putting together.

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4-26-2025 ⛱️🌈 Tel Aviv beach days hit like no other 🥰 got off the grid and was able to relax today. Let’s get back to the grind tomorrow!

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4-25-2025 🧖‍♀️ Didn’t get the relaxing day I wanted today - it’s hard when my weekend doesn’t align with the rest of the world’s weekend. Trying again for tomorrow and planning to hit the beach with friends.

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my boyfriend just told me I don’t have culture because I’ve never seen the Lego movie

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4-24-2025 🕐 The grind hit hard today 🫠 I want to absolutely disconnect from the planet this weekend lol let’s see if that can happen. I love that my job is always on but at the same time sometimes I need a break. My telegram DMs are always full and I’m never at inbox 0 but I’m just doing my best 🥹

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This is the vision I’ve had since the beginning! Your account isn’t just where your assets live - it’s where you live onchain. Socialize, play, transact, and earn - all from 1 account. I remember talking about this vision back at Devcon with @jessepollak and it’s so cool to see it coming true.

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4-23-2025 💻 Long day in the office today and Pectra updates are out 🎉 As mentioned in the official announcement, the recommendation for wallets implementing EIP-7702 is to use ERC-4337 bundlers for gas abstraction, batching, and validation.

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4-22-2025 💳 AI agents are a great use case for smart wallets bc: 1. Gas abstraction - agent doesn't have to hold ETH 2. Programmability - limit what the agent interacts with i.e. "never spend>0.1 ETH in a tx" 3. Session keys - time-limited authority while the user holds the private key

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Smart accounts ≠ just wallets. They’re programmable identities. That can vote, stake, swap. Recover access. Enforce rules. Act across chains. And stay private. Accounts become the interface to Ethereum. Not the dApp, not the wallet. The account.

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4-21-2025 ⛓️‍💥 L2 fragmentation has gotten worse by the day. The more chains there are, the more confusing it is for the user. The end user shouldn’t have to choose between chains or bridges. Uniswap could have focused on cross-chain Interop but instead launched another L2. Interop standards solve this.

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Follow the gas! The top L1 spenders aren’t L2s - they’re dApps and bots. Today, if you look at the top 30 customers of L1 gas fees there aren't any L2s - there are dApps and MEV bots. Blobs aren't the answer - enough L2 scaling, let's scale the L1.

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one day our kids will ask us how we lived without ai tools like ChatGPT and it will be like us asking them how they lived without internet

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4-20-2025 🌅 Heading back to Tel Aviv today. Bittersweet to leave but excited for the beach and getting back to my routine.

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4-19-2025 🌸 Happy first nice day of spring nyc! Sheep’s Meadow is elite 🔥

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