David 'JoelKatz' Schwartz (@JoelKatz) header
David 'JoelKatz' Schwartz (@JoelKatz) profile picture

Replacing TradFi with decentralized, censorship-resistant blockchain tech. CTO Emeritus at Ripple; one of the original architects of the XRP ledger.

San Francisco, CA
Joined April 2009
SCAM ALERT: There has been a huge escalation lately in airdrop and giveaway scams targetting XRPL users lately. Any such posts you see are likely scams. Anyone claiming to be me on Instagram, Telegram, or almost anywhere else is likely a scammer. Stay safe XRP fam.
470
1,382
98
6,590
730,914
So sorry to hear about Dave Ramsey's financial and marital problems. I guess it really can happen to anyone.
This quoted post is unavailable.
167
63
3
1,029
238,106
Spinning an Euler disk. (Sound on!)
444
237
70
2,241
332,866
Shill your XRP and XRPL projects here in this thread. It is also fine to shill non-XRP(L) crypto projects or even non-crypto projects. Share what you're interested in. Here's the place for it.
Replying to @JoelKatz
Obviously not here to insult or condemn, and that is not acceptable, but how do we bring a new project to your attention? Being one of the fathers of the XRPL it’s natural people will be excited to tell you what they are developing. Maybe a post once a week to invite those new to the ecosystem to say hello? 👋👋👋👋
886
281
39
2,352
150,488
Where would we be without those experts?
I too think one of these things will happen...
33
11
1
292
46,933
Recently, there's been a significant increase in people responding to replies of mine that have nothing to do with crypto with insults or crypto content. I hate to do it, but I pretty much have to block for this because otherwise the people I'm replying to have no choice but to block me. The irrelevant replies spam their followers. A significant fraction of these posts have been posts accusing me of fraud or scamming. I want to be clear that I will block for this whether your post is a criticism or a compliment. I absolutely don't mind people criticizing me or accusing me so long as it doesn't reduce to slurs and has some actual content. Just please do it in your own threads or do it in replies to my threads where it has some kind of relevance, at least a little. Stalking me around X to find places where I'm talking on other people's threads to say "scammer" or even "XRP is great!" angers the people I'm replying to, and that I will not tolerate. If you were blocked for this and promise not to do it again, find some way to get my attention and I'll unblock you, even if you absolutely hate me and think I'm worse than the devil. Just don't use me to spam other people's followers. Thank you for your attention to this matter!
644
244
35
5,142
241,558
I picked the right time to retire!
We are now allocating a significant amount of our frontier compute towards discovering and patching vulnerabilities in open source codebases, fully pro bono. In one case, we studied the Linux kernel, which is a particularly load-bearing piece of software at OpenAI. Before AI, security researchers might discover ~20 local privilege escalation (LPE) vulnerabilities in Linux in a typical year. In one week's time, our upcoming frontier cyber model was able to find ~1000 LPE vulnerabilities using about $1M of tokens. In the process, it was able to discover at least 10 novel classes of Linux exploitation techniques.
160
124
25
1,625
152,535
My hub currently has over 550 happy peer connections. Median peer application-to-application round-trip latency is around 200ms and incoming message rate is about 110,000 peer messages per second.
105
91
6
940
79,701
My daughter is a DevOps expert, currently at Binance on the hot wallet infrastructure team but frustrated with all the restrictions they impose. She's been looking for a new job for a few months. Anyone have any connections that might help her?
249
141
11
2,128
175,077
She has a lot of experience, formerly at Muchables and before that at Sky Mavis. She goes by "B".
24
20
7
396
71,477
Gemini got the joke!
19
13
3
479
39,378
You can have my RAM when you pry it from my cold, dead hands. @sama, come at me bro!
143
127
19
1,932
127,253
Also, thanks for following me. Mad respect, bro.
25
6
297
26,414
Low effort costumes, but we think we look cute.
327
170
37
4,302
182,795
At one time, I believed as many do that, as @DefendOurJuries puts it, "juries have an absolute right to acuit a defendant according to their conscience". But I no longer do. And the primary reason is that a justice system built around this principle (and ours most definitely is not) would be incredibly unfair to the accused. Think through the second-order effects of actually accepting this principle. For example, if we really do believe and accept that it is perfectly reasonable for a jury to find a person not guilty, even if they believe all elements of the charged crime are satisfied, because they cannot vote guilty with a clear conscience, then *any* evidence that would let the jury vote guilty with a clear conscience is relevant and should be subject to the normal rules of admissibility. Was the accused a bully in high school? I don't like bullies. If a person is charged with a minor drug possession offense that many jury members might not think should be a crime at all, knowing that might help me vote guilty with a clear conscience. If we generally believe that information should be relevant to my decision, why should it not be admissible? And what about evidence that drug use leads to traffic accidents that kill innocent children? That's relevant to deciding your conscience permits convicting a person for a simple drug possession offense, isn't it? So is that now admissible in drug possession trials? We either believe it's perfectly permissible for juries to vote their convictions or we don't. And if we do, it has to be permissible for prosecutors to present argument and evidence that in this particular case, you can vote guilty with a clear conscience. And that would almost literally destroy our justice system.
37
30
1
398
55,247
The last celebrity death that I can remember that hit the world as hard as Patrick Stewart, someone every decent person loved and who really felt like the person who should be immortal if anyone ever could be, was George Burns.
191
106
13
1,913
126,086
Several people responded with celebrity deaths that came close. No disrespect to any of those amazing people, but I still think Patrick Stewart and George Burns were on another level.
38
10
231
23,551
What about people who show up purely to support the right to peaceful political protest and to protest the fascist attempt to restrict it? Will you arrest them too?
Anyone planning to attend a demonstration in support of Palestine Action in the vicinity of the US Embassy on Saturday, 31 October will face arrest as part of a robust policing operation. Expressing support for the group is an offence under the Terrorism Act following its proscription in June 2025, a decision upheld by the Court of Appeal in June 2026. Read more: news.met.police.uk/news/met-…
121
61
7
911
122,144