Software Engineer. Co-founder of @handcashapp · $rjseibane

Joined May 2012
214 Photos and videos
Rafa Jiménez retweeted
If you worked on BSV and you've got a small business or a startup today, I want you to be one of the first to use something I've built 👀 - not payment related, though. Closed beta starts this Friday. Free for a month. DM me. If you've ever used HandCash help me with a RT🙏
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I love it "No pure managers: Every leader at Coinbase must also be a strong and active individual contributor. Managers should be like player-coaches, getting their hands dirty alongside their teams."
This is an email I sent earlier today to all employees at Coinbase: Team, Today I’ve made the difficult decision to reduce the size of Coinbase by ~14%. I want to walk you through why we're doing this now, what it means for those affected, and how this positions us for the future. Why now Two forces are converging at the same time. We need to be front footed to respond to both. First, the market. Coinbase is well-capitalized, has diversified revenue streams, and is well-positioned to weather any storm. Crypto is also on the verge of the next wave of adoption, with stablecoins, prediction markets, tokenization, and more taking off. However, our business is still volatile from quarter to quarter. While we've managed through that cyclicality many times before and come out stronger on the other side, we’re currently in a down market and need to adjust our cost structure now so that we emerge from this period leaner, faster, and more efficient for our next phase of growth. Second, AI is changing how we work. Over the past year, I’ve watched engineers use AI to ship in days what used to take a team weeks. Non-technical teams are now shipping production code and many of our workflows are being automated. The pace of what's possible with a small, focused team has changed dramatically, and it's accelerating every day. All of this has led us to an inflection point, not just for Coinbase, but for every company. The biggest risk now is not taking action. We are adjusting early and deliberately to rebuild Coinbase to be lean, fast, and AI-native. We need to return to the speed and focus of our startup founding, with AI at our core. What this means To get there, we are not just reducing headcount and cutting costs, we’re fundamentally changing how we operate: rebuilding Coinbase as an intelligence, with humans around the edge aligning it. What does this mean in practice? - Fewer layers, faster decisions: We are flattening our org structure to 5 layers max below CEO/COO. Layers slow things down and create coordination tax. The future is small, high context teams that can move quickly. Leaders will own much more, with as many as 15 direct reports. Fewer layers also means a leaner cost structure that is built to perform through all market cycles. - No pure managers: Every leader at Coinbase must also be a strong and active individual contributor. Managers should be like player-coaches, getting their hands dirty alongside their teams. - AI-native pods: We’ll be concentrating around AI-native talent who can manage fleets of agents to drive outsized impact. We’ll also be experimenting with reduced pod sizes, including “one person teams” with engineers, designers, and product managers all in one role. In short: AI is bringing a profound shift in how companies operate, and we’re reshaping Coinbase to lead in this new era. This is a new way of working, and we need to leverage AI across every facet of our jobs. To those who are affected I know there are real people behind these decisions — talented colleagues who have poured themselves into this company and our mission. To those of you who will be leaving: thank you. You’ve helped build Coinbase into what it is today, and I am sincerely grateful for everything you've done. All impacted team members will receive an email to their personal account in the next hour with more information, and an invitation to meet with an HRBP and a senior leader in your organization. Coinbase system access has been removed today. I know this feels sudden and harsh, but it is the only responsible choice given our duty to protect customer information. To those affected, we will be providing a comprehensive package to support you through this transition. US employees will receive a minimum of 16 weeks base pay (plus 2 weeks per year worked), their next equity vest, and 6 months of COBRA. Employees on a work visa will get extra transition support. Those outside of the US will receive similar support, based on local factors and subject to any consultation requirements. Coinbase prides itself on talent density. Our employees are among the most talented people in the world, and I have no doubt that your skills and experience will be highly sought after as you pursue your next chapters. How we move forward To the team that is staying, I know this is a difficult day. We’re saying goodbye to colleagues and friends you've been in the trenches with. But here’s what I want you to know as we move forward together: Over the past 13 years, we have weathered four crypto winters, gone public, and built the most trusted platform in our industry. We’ve made it this far by making hard decisions and by always staying focused on our mission. This time will be no different – nothing has changed about the long term outlook of our company or industry. And most importantly, our mission has never been more important for the world. Increasing economic freedom requires a new financial system, and we’re building it. The Coinbase that emerges from this will be more capable than ever to achieve our mission. Brian
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Rafa Jiménez retweeted
1/3 CODE SHARE 💻 If you're looking to start building transactions on BSV, Rafa Jiminez, co-founder of Handcash shared a helpful tip to get you started, no low-level Bitcoin knowledge required. @_rafa_js // @handcashapp
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Rafa Jiménez retweeted
1/6 We spoke with Rafa Jiminez, co-founder of HandCash about the future of tokenisation and blockchain's role within it. Here's what we learned:​ @_rafa_js // @handcashapp
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Rafa Jiménez retweeted
1/5 BUILT ON BSV: @handcashapp removes the complexity of blockchain for devs and users alike. No keys, no wallets, no friction. Just fast, secure digital interactions with a simple handle.​ @handcashapp // @_rafa_js
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Tapas Blockchain. What else do you want?
Experts in #BSVblockchain have partnered with @unicomplutense Madrid (UCM), supported by @handcashapp and Resguardar, to offer two hands-on Spanish summer courses.​ Enrolment is open and spaces are limited – secure your place now and join Rafael Jiminez Seibane alongside BSVA's Axel Maisonneuve, Carlos Blasco Bueno, Eva Porras, PhD, and Managing Director Ásgeir Thór Óskarsson. Introduction to Blockchain Technology: Bitcoin, Altcoins - Their Cross-Cutting Utility and Use Cases in Productive Sectors​ ▪️July 22 | Madrid​ 📍Find out more about the course, available scholarships & how to enrol now: lnkd.in/eR_W2uEd Blockchain Gamification, Economy Building, Smart Contracts and Tokenised Assets on BSV​ ▪️July 23-25 | Madrid​ 📍Find out more about the course, available scholarships & how to enrol now: lnkd.in/dBcav5Ds #BlockchainCareers #BSV #BlockchainEducation #Tokenisation #BSVAssociation
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20 Jun 2025
The market is shifting from "crypto speculation" to "utility." This is your opportunity to learn the fundamentals necessary to build real-world applications. What's in your agenda next month?
Experts in #BSVblockchain have partnered with @unicomplutense Madrid (UCM), supported by @handcashapp and Resguardar, to offer two hands-on Spanish summer courses.​ Enrolment is open and spaces are limited – secure your place now and join Rafael Jiminez Seibane alongside BSVA's Axel Maisonneuve, Carlos Blasco Bueno, Eva Porras, PhD, and Managing Director Ásgeir Thór Óskarsson. Introduction to Blockchain Technology: Bitcoin, Altcoins - Their Cross-Cutting Utility and Use Cases in Productive Sectors​ ▪️July 22 | Madrid​ 📍Find out more about the course, available scholarships & how to enrol now: lnkd.in/eR_W2uEd Blockchain Gamification, Economy Building, Smart Contracts and Tokenised Assets on BSV​ ▪️July 23-25 | Madrid​ 📍Find out more about the course, available scholarships & how to enrol now: lnkd.in/dBcav5Ds #BlockchainCareers #BSV #BlockchainEducation #Tokenisation #BSVAssociation
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20 Jun 2025
Te gustaría aprender a monetizar videojuegos usando la blockchain? 📍 Únete a nosotros el mes que viene en Madrid: - Aprende los fundamentos - Ejemplos prácticos y reales - Create tu propia economía en el juego cursosdeverano.ucm.es/progra… Unas pocas plazas gratis; DM si te interesa!

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20 Jun 2025
Would you like to learn how to monetize games using the blockchain? 📍 Join us next month in Madrid: - Understand all the fundamentals - Learn from real-world examples - Create your own game economy cursosdeverano.ucm.es/progra… A few free slots available; DM me if you're interested!

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Rafa Jiménez retweeted
16 May 2025
¡Por fin ha llegado el día! 🔥 Primer episodio del podcast de nuestra agencia de posicionamiento de marca, @marcadif Empieza Marca la Diferencia.
¡Ahora sí! El primer episodio del podcast Marca la Diferencia ya está disponible en YouTube, y en unas horas también lo estará en Spotify y Apple Music. Con Alex Agut @apagut y Raúl del Río. 👉 youtube.com/watch?v=poG6VJZB…
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15 May 2025
Thanks @MNEE_cash for making it possible. After years of fighting hard to offer stablecoins for companies and users, we made it! Stablecoins offer the best of both worlds in terms of digital cash. - They are simple for users as they represent a unit of value they know. In this case, USD. - Send/receive is instant and costs ~0 USD.* *Only possible with the right blockchain and the right stablecoin 😉
15 May 2025
Welcome to HANDCASH, MNEE ❤️💵 You may now send and receive MNEE with HANDCASH Available on WEB & ANDROID (iOS update pending)
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This is massive news for game developers!! The easiest way to open a game shop right now is @handcashapp - You pay 10% instead of 30%. - You earn another 5% from the secondary market. - Gamers are happy because they own their game items and can monetize their progress. DM us to get started 🤝
30 Apr 2025
This is a huge deal and a huge win for the web… No fees on web transactions from  iOS apps in the USA 🇺🇸 (nor Europe 🇪🇺 via Digital Markets Act.) The Court has ruled that “linked-out purchases” defined as“purchases made off the Apple platform, but from which a consumer can leave the platform using a link on the app.” are not subject to 27% fees. Thank you @TimSweeneyEpic!
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Don't read this 👇
1 Apr 2025
It's been over 15 years since Bitcoin white paper was released. However, most people still don't understand one of the most interesting use cases. Let me explain... 🧵
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How often do you read the Bitcoin white paper?
17% Once a day
13% Once a month
47% Once a year
23% Never
47 votes • Final results
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31 Mar 2025
Almost there!
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28 Mar 2025
Coming soon to @handcashapp
27 Mar 2025
Why would consumers choose BitCoin over Solana when the onboarding experience is so much worse? My latest video explains the solution that could level the playing field. #BSV youtu.be/xbDnnMlzLJs?si=wbOu… via @YouTube @MNEE_cash @HarbindL
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27 Mar 2025
The UI is ready. Any progress with the contract?
21 Mar 2025
Can anyone build the following smart contract on BSV? The user sends the equivalent to $50 of BSV and receives $50 of MNEE. BSV <-> MNEE
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26 Mar 2025
Show me your wallets 👀
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25 Mar 2025
$5M / day That's how much money is traded in the CS:GO black market. @valvesoftware could monetize that market while keeping protecting players by using the blockchain. This is how...
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25 Mar 2025
4) A better game economy Players can monetize their rare items in the secondary market while CS:GO makes money from it. All of that with confidence and transparency.
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25 Mar 2025
The next time you see a secondary game market, remember how much better it could be! This is how @handcashapp is boosting game economies.
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