Dmitry Petrashko @darkdimius

Currently @AnthropicAI. Ex @Stripe, https://t.co/mgpYgtgojo compiler architect, PhD on developing fast & maintainable compilers. d-d.me San Francisco, CA Joined November 2010

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Dmitry Petrashko @darkdimius

4 months ago

I don't tweet often, but this felt worth it. The dependability and safety of the systems I help build matter. So does the integrity of the company building them. Proud of @AnthropicAI for standing firm.

Anthropic @AnthropicAI

4 months ago

A statement on the comments from Secretary of War Pete Hegseth. anthropic.com/news/statement…

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Dmitry Petrashko @darkdimius

5 months ago

Being able to use Fast Opus early at Anthropic has been one of the best perks of the job. Come build with us and help drive a race to the top for safe, powerful AI.

Claude @claudeai

5 months ago

Our teams have been building with a 2.5x-faster version of Claude Opus 4.6. We’re now making it available as an early experiment via Claude Code and our API.

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Dmitry Petrashko @darkdimius

2 years ago

🔍 Ever wondered how Stripe maintains 99.999+% availability? 🤔 🗄️ Our internal Database as a Service system handles version upgrades, resharding, and more while ensuring consistency without any downtime. 💪 🌟 Check out our latest blog post to lean!

Stripe @stripe

2 years ago

How Stripe’s document databases supported 99.999% uptime with zero-downtime data migrations: stripe.com/blog/how-strip….

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Patrick Collison @patrickc

2 years ago

I was an undergrad in 2006. Friends who've been in academia since then, and remain on campus today, tell very similar stories.

John Arnold @johnarnold

2 years ago

Two Harvard Crimson articles, one from 2006 and the other from 2023, describing the legendary Math 55 class showcase how much college has changed in less than a generation. '06: “This is probably the most difficult undergraduate math class in the country,” reads a page on the

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Martin Odersky @odersky

3 years ago

I am very saddened by this news. Niklaus got me into CS since I became fascinated by the beauty of his language designs and compiler architectures. And later he became the guiding mentor for my doctoral studies at ETH.

Bertrand Meyer @Bertrand_Meyer

3 years ago

We lost a titan of programming languages, programming methodology, software engineering and hardware design. Niklaus Wirth passed away on the first of January. We mourn a pioneer, colleague, mentor and friend.

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Patrick Collison @patrickc

3 years ago

John's and my 2022 annual letter for Stripe: stripe.com/annual-updates…. Topics covered include: • The increase in startup creation rates. • Trends in startup hubs. • The perils of "low-revenue mode".

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Dmitry Petrashko @darkdimius

4 years ago

Many challenging opportunities in product and infrastructure (Databases, Observability, Compute, Developer productivity, Networking, BigData, etc). Solving each one of them directly or indirectly impacts businesses across the world. We're hiring. stripe.com/jobs

John Collison @collision

4 years ago

This year, we decided to publish our annual letter to all of Stripe's users stripe.com/annual-updates…

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Vera Bergengruen @VeraMBergen

4 years ago

Here's a transcript of a Russian soldier's last text messages to his mother that Ukraine's Ambassador to the UN just read out from screenshots at the emergency session of the UN General Assembly

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Dmitry Petrashko @darkdimius

4 years ago

#Ukraine needs medical supplies for civilians. Currently there isn't enough supply and money can't buy something that isn't there. Trucks from Italy, Germany and Switzerland will be bringing supplies soon. Find how you can help in docs.google.com/spreadsheets/d…. #UkraineRussiaWar

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🇺🇦 Alex Polozov @Skiminok

4 years ago

Folks, public protests & posts are all very nice. And we appreciate them, truly ♥️ But the best way you can help #Ukraine _right now_ is this: Army: savelife.in.ua/en/donate/ Military tech support: armysos.com.ua/en/help-the-ar… Medics: facebook.com/hospitallers/ (English in each post)

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Dmitry Petrashko @darkdimius

5 years ago

Since Thursday last week @stripe Infrastructure and Security teams have been investigating the Log4j vulnerability. We’re happy that our defence in depth has protected our systems. We're sharing tools that help find vulnerable hosts and see if your mitigations are effective.

David Singleton @dps

5 years ago

I’m proud of Stripe’s security and infra teams who have investigated and patched all our systems against the Log4j vulnerability since the moment the news dropped. Our pre-existing controls protected Stripe from any form of remote code execution.🧵

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Dmitry Petrashko @darkdimius

5 years ago

@jeanqasaur @hongyihu What are the topics you'd like to cover? first 90% or last 10%? I was on @sorbet_ruby team starting from design-prototyping stage till 90% of production code was typed. Someone from the current team is likely going to be able to cover last 10% & typing test code much better.

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Dmitry Petrashko @darkdimius

5 years ago

@alevermeulen @stripe We have a Dublin engineering hub that coordinates remotes from across Europe. Both product and infrastructure teams have presence there.

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Dmitry Petrashko @darkdimius

5 years ago

There's a lot of exciting engineering at @stripe. We have high security, compliance, correctness, reliability, latency and efficiency requirements. All while empowering engineers be more productive than ever in their career. This creates impactful challenges. We are hiring.

Sorbet @sorbet_ruby

5 years ago

For the past year, the Sorbet team has been working on an experimental, ahead-of-time compiler for Ruby, powered by Sorbet and LLVM. Check it out! sorbet.org/blog/2021/07/3…

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Dmitry Petrashko @darkdimius

5 years ago

@grashalm_ @eregontp @Albozdroid @patrickc @thomaswue @ChrisGSeaton @headius Again, we're not a JIT. If these invariants fail, you don't get to have a green CI build and your change cannot get merged.

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Dmitry Petrashko @darkdimius

5 years ago

@grashalm_ @eregontp @Albozdroid @patrickc @thomaswue @ChrisGSeaton @headius If these invariants fail, you get a failed CI build and your change cannot get merged. Stripe uses an opinionated dialect of Ruby and most requirements predate compiler. E.g. we don't allow to define behaviour for a class/module in multiple files since 5 years ago.

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Dmitry Petrashko @darkdimius

5 years ago

@eregontp @Albozdroid @patrickc @thomaswue @ChrisGSeaton @headius We don't alter semantics, but we require and check a set of invariants that are enforced at Stripe. That includes checking that nothing redefines Integer#+ and other things that we have found useful for reliability, security and developer velocity in our huge codebase.

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Dmitry Petrashko @darkdimius

5 years ago

@eregontp @Albozdroid @patrickc @thomaswue @ChrisGSeaton @headius It's AOT. Rollout of JIT or anything that generates executable code on production machines at Stripe will be a much more complex due to security constraints we chose to operate under for our customers.

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Dmitry Petrashko @darkdimius

5 years ago

@Albozdroid @patrickc @thomaswue @ChrisGSeaton @headius But neither JRuby nor TruffleRuby can be adopted gradually and invisibly for engineers. Our compiler allows to run inside rubyVM with a subset of files compiled and another one interpreted. All cRuby tools continue working as they did before - it's completely transparent.

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Dmitry Petrashko @darkdimius

5 years ago

@Albozdroid @patrickc @thomaswue @ChrisGSeaton @headius Both of JRuby, and, in particular, TruffleRuby indeed are faster on synthetic benchmarks then our internal compiler. (continued in reply)