VP of Engineering & Head of AI at Promise. Previously @Cashapp, @Square, @Twitter, and @Microsoft. Investor at @SpaceX. @Stanford alum. @MIT researcher.

Miami, FL
Joined May 2012
Samir Selman retweeted
OMG… the Tesla Roadster just went upside down on a half pipe and landed!
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A personalized mRNA cancer vaccine passed Phase 3, genuinely great news for melanoma patients! What happens here? They sequence your tumor, find up to 34 mutations unique to it, and build a custom vaccine that trains your immune system to hunt those exact cells. In a phase 2 trial earlier this year the vaccine with immunotherapy has shown ~49% lower risk of recurrence or death vs immunotherapy alone, which is the current standard of care. We are waiting now for the details of the phase 3. After that that concept is now expanding to lung, kidney, bladder cancer and hopefully to many more to come. Huge win for science!
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Samir Selman retweeted
Elon Musk
@elonmuskJun 4
Starlink V3 satellites have >10X bandwidth of V2 and there’ll be >10X launched, which means >100X more bandwidth. Also, altitude will be 350km vs 550km, so min latency can be cut in half. Light travels 300km/ms in space, so physics round trip min latency drops to <5ms.
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Samir Selman retweeted
Joshua Landis
@joshua_landis23 Jul 2025
BBC Confirms the massacre of #Druze doctors, nurses, and patients in the #Syria National Hospital of #Suwayda by government forces. Dr Wissam Massoud, a neurosurgeon at the hospital, told the BBC: "It was a massacre… The soldiers came here saying they wanted to bring peace, but they killed scores of patients, from the very young to the very old." Multiple testimonials By @jondonnisonbbc So many commentators insisted that this was fake news, when I originally posted. See comments below on original post. I took down my first post about this because so many comments insisted it was a massacre carried out by the Druze, that it was faked, etc. Then I redid it because it was so clearly carried out by gov troops. The commentator in the second video kept congratulating the soldiers for killing so many. youtu.be/nMFa1xLp_6Y?si=of0r…
Joshua Landis
@joshua_landis16 Jul 2025
Massacre of Druze in #Syria at the National Hospital of Suwayda. In the first video, a Druze nurse is pleading for help as regime soldiers are about to overrun the hospital. In the second video, a regime soldier films the results of the capture and proclaims that “God is Great” and thanks the lord for the victory.
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NEWS: Elon Musk's company, Neuralink, aims to implant its new brain chip, Blindsight, into a human patient for the first time in late 2025. The device aims to restore sight to people who are completely blind. Elon: "it will be low resolution at first, but over time, the impact will enable vision that is like super human." via his Wisconsin speech tonight. Neuralink's Telepathy chip pictured below.
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Samir Selman retweeted
Gold had no premine. Corn had no premine. Aluminum had no premine. #Bitcoin had no premine. Hard money is earned, not allocated. Premined, centralized garbage isn’t strategic. I call it like I see it. This isn’t about making friends, it’s about changing the world for the better
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Samir Selman retweeted
Starlink estimated to reach $6.6B revenue in 2024. Above my initial estimate for 2024 stood at $6.2 billion. Even more impressive: Quilty Space estimates Starlink’s EBITDA to reach $3.8 billion in 2024, a significant leap from -$128M in 2022.”We expect Starlink to achieve positive FCF for the 1st time in 2024,”
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Samir Selman retweeted
same week. same dude.
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BREAKING: SpaceX is now offering a Starlink service that can deliver 10 gigabit internet speeds, the fastest satellite internet speeds in the world. Starting at $75,000/Gbps/month with a one-time upfront cost of $1.25M: • Download speed: 10Gbps • Upload: 10Gbps • Latency: Under 99 ms For that $1.25M one time fee, SpaceX won’t just send a dish; it’ll help build an entire facility dedicated to receiving up to 10Gbps in broadband speeds from the company’s fleet of orbiting satellites. This new service is a business program: "With Community Gateways, Starlink satellites are able to deliver fiber-like speeds with local providers distributing connectivity to homes, businesses, and governments using last-mile fiber, fixed wireless and mobile wireless. The Community Gateway traffic transits through Starlink's global laser mesh network and utilizes our high bandwidth Gateways operating in a dedicated Ka spectrum band." Source: pcmag.com/news/starlinks-lat…
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Samir Selman retweeted
The test of character is how you treat the powerless.
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Samir Selman retweeted
Build real products that help people’s lives, instead of enabling and encouraging get rich quick schemes. Focus on long-term sustainable business models that generate revenue from real customers, and eventually generate cash flow. It’s that simple.
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Samir Selman retweeted
@jason
@Jason16 Nov 2022
.@POTUS we must extend the 60-day grace period for laid-off H1B visa holders to find another job during this economic downturn I suggest 6 months These hard-working, high-tax-paying individuals are critical to the economy & it's the right thing to do cc @SteveCase @glennkelman
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Samir Selman retweeted
Make twitter blue checks NFTs. If I could set royalty fees on mine, I'd sell it 🤪
The status part of the blue check comes from its exclusivity. How about limiting supply of #bluechecks to 5% of twitter users and auctioning them out to the highest bidders with IDV on a monthly basis? Similar to auctioning ad space to advertisers. @elonmusk @jack
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Why I’m having so much fun building a product and team with @selman and @hunt__design - they embody all of these ⚡️⚡️
Work with people who: - consistently change your mind - care more about getting it right than being right - enjoy sparring intellectually - don’t give for the sake of social cohesion Last but not least, you have an absolute blast spending time together.
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Samir Selman retweeted
Replying to @FrancisSuarez
Hello @FrancisSuarez! We at @CashApp are hiring and want to contribute in creating top-paying jobs in Miami (fully remote). Today I have a callout to all the brilliant software Engineers to join one of the fastest growing fintech companies. My DMs are open and ready for resumes!
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Welcome!!! It’s people like you that are going to help us continue to grow our tech ecosystem and create high-paying jobs for so many in our city. Thank you for choosing us!!!!
Replying to @FrancisSuarez
@FrancisSuarez first week in Miami after moving from SF. Gotta say not only the weather is awesome, but also the diversity of the people here 😍. Fellow techies, this is the place to be I promise!
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Samir Selman retweeted
Cathie Wood
@CathieDWood15 Oct 2020
Passive investing is unlikely to keep pace with the exponential growth of the five innovation platforms and 14 technologies evolving today. In our view, S&P is depriving benchmark-sensitive investors of some of the most important investment opportunities in the world, like $TSLA.
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Samir Selman retweeted
D® Phil
@philabouzeid3 Oct 2020
Replying to @jackiereses
@selman ❤🇱🇧 always proud
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