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Josef Jelacic
@JosefJ_
DeFi can move billions in seconds. We’re putting it to work financing real homes for decades - on Ethereum. Building @OWN_HQ · ex-@ethereumfndn
1.2K Following    3K Followers
cooking up an ETH meetup in Astana for the end of September with @JosefJ_ - who’s in?
While I'm really thrilled about getting access to GPT 6, my weekend just ended. Thank you very much! 😅
We’re looking for a Head of Community and Ecosystem at @worldcoinfnd
Tailscale without Tailscale, by Tailscale. Meet tailcat. tailcat is an open-source Go package and CLI that lets you use Tailscale’s data plane without the control plane. No accounts, logins, admins, or IPs to manage. Learn more →
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A five-year onchain loan bought a physical space and a source of yield. Lenders and borrowers transact directly through smart contracts, providing fixed rates with no price liquidations. DeFi lending can finance something tangible in the real world, like real estate. The @own_hq team have just shared a proposal for GnosisDAO's consideration.
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Come to Zug, they said. It’s the Crypto Valley, they said. It may be home to a ton of crypto organizations, but who’s still here building exciting things on Ethereum? Let’s find out. Zug Ethereum Meetup #0#, September 7:
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we will finally kill "stack too deep" the next @ethereum update brings both: 1) the ability to deploy larger contracts 2) lets compilers fix "stack too deep" eth dev is going to rip in Q4
Freedom for iPhone now runs 5 p2p nodes in parallel 1) Ethereum light client (myotis) 2) Gnosis light client (myotis) 3) Swarm 4) IPFS 5) Radicle can't wait to release it :-)
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I'll refrain from posting about ETHEREUM today.
Checkout Powerrr - a trivial tool for comparing borrowing rates across DeFi paging @aave @Morpho @sparkfinance - let's make rates a bit more competitive? ;)
Every DeFi user has asked this at some point: “Given the assets in my wallet, where can I borrow against them - and where do I get the best rate?” We built Powerrr to answer that in seconds. 1/4 👇
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Honestly crazy. This is why people choose Ethereum
Every DeFi user has asked this at some point: “Given the assets in my wallet, where can I borrow against them - and where do I get the best rate?” We built Powerrr to answer that in seconds. 1/4 👇
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We have some difficult news to share. Unfortunately, one of our shipping providers has experienced a data breach that exposed sensitive order data. This affects new customers in the US, UK, Sweden, Colombia, Brazil, Italy, and Portugal who received an order within the 90 days prior to August 8th, 2026. The data exposed: - Full names - Shipping addresses - Phone numbers - Email addresses The incident affects 11,742 customers with full exposure (name, email, phone number, shipping address) and 1,947 customers with partial exposure (name, city, email). The breach is limited due to Trezor’s strict 90-day data storage policy (we were also able to negotiate the same terms with fulfillment partners, who follow the same policy). All affected customers have been contacted separately by email. Our systems and devices remain secure, but affected customers could experience an increase in phishing attempts. NEVER enter your wallet backup on a website or share it with anyone, and only check for updates on official Trezor channels. We are deeply sorry to the community and those affected. We are investigating this situation and will post updates on our blog:
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Important personal news: I left the Ethereum Foundation. In 2022. I didn’t make any noise about it then, but departure announcements are having a moment - so I’m finally joining the trend. 🤷‍♂️
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Here is how I'm using Ethereum as evidence of conduct: When this all happened, someone asked me a fairly naive question.. “Why didn’t you crypto people use those smart contracts?” There was no situational need at the time. But I generally agree that we should dogfood this stuff as much as possible. The apology should have been published already. It wasn’t. So I built a small monitor bot that: i) captures screenshots + html of the relevant social profiles ii) generates a validation report against keywords referenced in the court ruling (no AI needed) iii) hashes the daily evidence package iv) anchors the hash on Ethereum via a simple self-transfer v) sends me a notification with the result + tx hash Ethereum does not decide what happened or replace legal process. But it provides a durable, independently verifiable record that a specific evidence package existed, unchanged, at a given point in time. Trivial, right?! But über-useful! Down the line, I think Ethereum will play a major role in proving data existence: journalistic sources, internet archives, historical records, legal evidence and fighting AI frabrication. Because Ethereum is built to last!
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Three years ago, my crypto journey took a slightly unexpected turn. Until then, I kept things low-key, tried to live a fairly private life, avoided using my full name or my face in profile pictures, and only talked vaguely about my work. I just kept building and doing things that excited me, thinking I was living my crypto dream, surrounded by cypherpunks. Instead, I ended up in court, and all I was left with from building an alternative to the state is a bunch of worn-out merchandise. In the summer of 2023, I got a slap in the face. After about seven years of volunteering my time and helping to finance Paralelní Polis, the former cryptoanarchist base in Prague, I was accused by one of its founders of looting the organization for my personal gain. Long story short - and the reason I’m writing this - is that, on 8th of July 2026, a court ruling became final, ordering him to apologize for publishing defamatory allegations about me: a story that was used in a public call to boycott my projects and undermine my credibility in the industry. @Roman_Tyc, the person in question, proudly wears the labels of anarchist, vocal critic of state oppression, and Scout (note: Scout Law #1#: “A Scout is truthful.”) - yet from my recent experience also doesn’t mind fabricating suitable stories to sell. In his own words, Paralelní Polis, the NGO, follows a doctrine of independence from the state, and therefore they can’t go to the police or file a lawsuit to get justice. So why did I go to court with an anarchist? I didn’t. IMHO, even the anarchy part is just a pose. I went to court with a person whom I now think has zero integrity. And I did it to set boundaries. Despite all the labels, behind the scenes, I was getting requests and notices from his lawyer, and eventually I was called in by the police for questioning. I was accused of multiple crimes, both publicly and to authorities by this same “anarchist.” My work and personal life were impacted by having to explain the full story over and over. That nonsense had to stop. I don’t mind that he used the legal system - that is his right - but I’m in awe of how someone can keep publicly feeding the facade of being a defenseless victim while doing the opposite of what he preaches. Why did he do that? I don’t know. Perhaps it was bitterness at not getting his way. Anyway, I’m grateful to him for one thing: he certainly had the ability to attract a lot of interesting people, some of whom became my real friends. My clash also connected me with a handful of people who had previously had conflicts with him. I won’t retell other people’s stories here. But after my own case, it became impossible for me to treat this as an innocent misunderstanding. In the end.. stupid games, stupid prizes. It’s over now. I actually wrote a longer analytical post about lessons learned about our crypto community, but I’ll stop here. I had to get it off my chest. It's bittersweet, yet I’m glad I stood my ground. I’m glad I’m finally getting closure. Maybe just one general reminder: Today I accept my own fault and my failure of judgment. The clues were in plain sight, and I ignored them, thinking that “this time it’s different.” The signs of misbehavior, mockery, and blaming people behind their backs - they were all there, all along. I just thought it didn’t concern me, and that maybe each of those cases had a bit of merit. Well, next time you engage with a person you see using everyone else around them, you better bet you are being used as well. Here is my final appeal: should I ever, in my dealings, become a selfish narcissist who takes credit for things I have little to do with, or should I ever blame everyone else for my own failures, please send this back to me. Leb wohl.
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When was your first POAP? These were minted retrospectively btw.
Three years ago, my crypto journey took a slightly unexpected turn. Until then, I kept things low-key, tried to live a fairly private life, avoided using my full name or my face in profile pictures, and only talked vaguely about my work. I just kept building and doing things that excited me, thinking I was living my crypto dream, surrounded by cypherpunks. Instead, I ended up in court, and all I was left with from building an alternative to the state is a bunch of worn-out merchandise. In the summer of 2023, I got a slap in the face. After about seven years of volunteering my time and helping to finance Paralelní Polis, the former cryptoanarchist base in Prague, I was accused by one of its founders of looting the organization for my personal gain. Long story short - and the reason I’m writing this - is that, on 8th of July 2026, a court ruling became final, ordering him to apologize for publishing defamatory allegations about me: a story that was used in a public call to boycott my projects and undermine my credibility in the industry. @Roman_Tyc, the person in question, proudly wears the labels of anarchist, vocal critic of state oppression, and Scout (note: Scout Law #1#: “A Scout is truthful.”) - yet from my recent experience also doesn’t mind fabricating suitable stories to sell. In his own words, Paralelní Polis, the NGO, follows a doctrine of independence from the state, and therefore they can’t go to the police or file a lawsuit to get justice. So why did I go to court with an anarchist? I didn’t. IMHO, even the anarchy part is just a pose. I went to court with a person whom I now think has zero integrity. And I did it to set boundaries. Despite all the labels, behind the scenes, I was getting requests and notices from his lawyer, and eventually I was called in by the police for questioning. I was accused of multiple crimes, both publicly and to authorities by this same “anarchist.” My work and personal life were impacted by having to explain the full story over and over. That nonsense had to stop. I don’t mind that he used the legal system - that is his right - but I’m in awe of how someone can keep publicly feeding the facade of being a defenseless victim while doing the opposite of what he preaches. Why did he do that? I don’t know. Perhaps it was bitterness at not getting his way. Anyway, I’m grateful to him for one thing: he certainly had the ability to attract a lot of interesting people, some of whom became my real friends. My clash also connected me with a handful of people who had previously had conflicts with him. I won’t retell other people’s stories here. But after my own case, it became impossible for me to treat this as an innocent misunderstanding. In the end.. stupid games, stupid prizes. It’s over now. I actually wrote a longer analytical post about lessons learned about our crypto community, but I’ll stop here. I had to get it off my chest. It's bittersweet, yet I’m glad I stood my ground. I’m glad I’m finally getting closure. Maybe just one general reminder: Today I accept my own fault and my failure of judgment. The clues were in plain sight, and I ignored them, thinking that “this time it’s different.” The signs of misbehavior, mockery, and blaming people behind their backs - they were all there, all along. I just thought it didn’t concern me, and that maybe each of those cases had a bit of merit. Well, next time you engage with a person you see using everyone else around them, you better bet you are being used as well. Here is my final appeal: should I ever, in my dealings, become a selfish narcissist who takes credit for things I have little to do with, or should I ever blame everyone else for my own failures, please send this back to me. Leb wohl.
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HIRING: a research associate to help us advocate for Ethereum & DeFi in Europe: TLDR: - Data reports on: - - Decentralization & DeFi taxonomy - - Tokenization & Stablecoins - - European Ethereum ecosystem - Ideally an enrolled student - Part-time under @EuEthInstitute 👇
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