Cloud builder. Java Champion. Prev: @testcontainers co-creator, CEO/co-founder at @AtomicJarInc (acqd by @docker), StaffEng at @Pivotal/@vmware, @zeroturnaround
Joined April 2011
- Tweets 23,479
- Following 1,775
- Followers 8,147
- Likes 56,382
1,748 Photos and videos
Jun 10
I miss the days when startup people had dignity and thought twice before tweeting.
The braindead Twitch culture has become a norm at startups these days 🤷♂️
I guess we can thank AI and “they will buy it anyway” for this. Endorsed by @Cloudflare, btw!
im late to the loops discourse but from what i'm seeing it's mostly about creating a loop from your asshole back into your own mouth?
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Jun 9
They were so excited to celebrate Dow Jones breaking the 50,000 mark that they decided to do it again a few more times! 👏
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May 23
Ahh, right! The famous DynamoDB wire protocol that we all admire and couldn't wait to use with other databases, especially the pesky PostgreSQL 👌
“You're absolutely right, it should be the other way around! Let me rewrite that PRFAQ”
May 22
🚀 Just launched: ExtendDB — an open source DynamoDB-compatible adapter written in Rust.
✅ Full wire-protocol compatibility ✅ PostgreSQL storage backend ✅ Pluggable architecture for more backends ✅ Works with existing AWS SDKs & CLI
Apache 2.0 | v0.1 — come build with us 🛠️
go.aws/4fzBl2C
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Antigravity is built with Bubble Tea and Lip Gloss.
x.com/shengzheyao/status/205…
May 20
Super excited to finally drop agy — the Antigravity CLI,
built completely in golang bubbletea (@charmcli). We took the exact same agent harness powering antigravity and brought it straight to your terminal. It is blazingly fast, zero bloat, pure local speed.
some pro-tips for the power users in the thread below 👇
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May 19
At this stage, I'm thinking about revisiting some of my "I will never be able to monetize this" GitHub projects 😂
May 18
Anthropic is acquiring @stainlessapi, an SDK and MCP server platform that has powered every Anthropic SDK since the earliest days of our API.
Read more: anthropic.com/news/anthropic…
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May 5
Second day of @bldrstartupweek and I can't stop thinking of the following:
We need a bolder startup community in Boulder.
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May 4
My Vitamin B is too high, by A LOT. Ooops!
Still testing various super powers, nothing works yet 😅
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May 4
The rumors are that the original name was Amazon Supply Services, but apparently it wouldn't be as catchy as AWS in the acronym form.
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May 4
I am at @bldrstartupweek and was really excited to attend the “Build in Public, Sell in Public How Founder Content Turns Attention Into Revenue” talk.
5 minutes in, the speaker shows a slide with 8 random names and says that if you don't know them - you were living under a rock. Apparently they are TikTok/LinkedIn/YT sloppers.
Welp, that's a start 🤦♂️
Then the speaker proceeds talking about herself. “I, I, me, I”, and how she started posting random trash on TikTok.
IMO such talk is “you had one job: NOT to talk about yourself” and so far the speaker failed miserably, with an arrogant opening. Sadge.
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May 3
So... Should I start doing the leg days or wait another year?
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May 2
If only there was a @Docker product to Offload these containers... 🤓
I've never utilized my local machine that hard before. 30 coding agent, and a full test suite with testcontainers on every commit.
worth it
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Apr 30
TIL GitHub's CTO is an advisor at CSS.
No surprise they have beautiful web UIs but major scalability issues!
(I will let myself out)
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Apr 23
This week, both Google and Microsoft launched a sandboxing solution for agents.
Perfect time to go and slop-post how your yet another vanity metric is growing if you're a Series A startup's CEO 😅
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Apr 23
I can't even 😂
x.com/ivanburazin/status/204…
Apr 23
We've been growing close to 75% month over month (on a purely cash collected basis)
The logos signing up are insane, and its 100% PLG.
x.com/ivanburazin/status/204…
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Apr 23
That moment when the OSS Pekko is faster than the original now-relicensed Akka 😅
Apr 23
Fresh #gRPC benchmarks just dropped (Apr 2026) and the results are 🌶️
# 1 CPU: #Rust Tonic dominates at 102K req/s using just 15 MiB RAM
# 2-4 CPUs: #Java Vert.x takes the crown at 153K req/s... but needs 305 MiB to do it
Meanwhile Rust Thruster does 139K req/s on 12 MiB. That's 25x less memory than Java.
#dotNET quietly sitting at #4-#8 across all configs. No hype, just solid numbers. The boring enterprise choice... that keeps winning.
Scala Pekko & Akka? Surprise top-5 finishers at 3-4 CPUs. JVM tuning is real.
Now let's talk about the bottom of the chart:
- #Python: 4,492 req/s (1 CPU)
- #Node: 12,471 req/s (1 CPU)
That's 23x slower than Rust.
Node doesn't even scale past 1 CPU — 16K req/s whether you give it 1 or 4 cores 💀
But sure, "developer productivity" even when it is AI generating code these days... 🫠
Full results → github.com/LesnyRumcajs/grpc…
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