Lambros Petrou
@lambrospetrou.com
Bootstrapping a business to simplify HTTP API testing 🐻 skybear.net
Principal Software Engineer @cloudflare.
Past: DDOG, WhatsApp, AWS/Amazon
🏠 lambrospetrou.com
Principal Software Engineer @cloudflare.
Past: DDOG, WhatsApp, AWS/Amazon
🏠 lambrospetrou.com
Pinned
Lambros Petrou
@lambrospetrou.com
· Feb 9
Insights
Monitor your script runs over time, and deeply understand your service behavior in production.
www.skybear.net
#SkybearNET Insights documentation📝 www.skybear.net/docs/feature...
I just documented the new Insights dashboard for SkybearNET.
Check out what you get out of the box across all your tests, and more are continuously added.
Hundreds of requests, thousands of asserts, each run.🤯
I just documented the new Insights dashboard for SkybearNET.
Check out what you get out of the box across all your tests, and more are continuously added.
Hundreds of requests, thousands of asserts, each run.🤯
Reposted by Lambros Petrou
> We've been profitable from month one – every single month for 20 years. That consistency has given us the freedom to make decisions based on what's right for our customers and our family.
The dream.
Hugely inspired by your journey, Ian. It’s something I’d love to have for myself one day.
The dream.
Hugely inspired by your journey, Ian. It’s something I’d love to have for myself one day.
I wrote up a few thoughts on HelpSpot turning 20 today ianlandsman.com/helpspot-tur...
HelpSpot Turns 20
ianlandsman.com
October 25, 2025 at 3:24 PM
> We've been profitable from month one – every single month for 20 years. That consistency has given us the freedom to make decisions based on what's right for our customers and our family.
The dream.
Hugely inspired by your journey, Ian. It’s something I’d love to have for myself one day.
The dream.
Hugely inspired by your journey, Ian. It’s something I’d love to have for myself one day.
Reposted by Lambros Petrou
Those benchmarks from @t3.gg revealed some interesting issues in Workers. Happy to say it's all fixed now, save for some lingering next.js-specific stuff we're continuing to work on. Thanks for the reproducible test cases, @t3.gg.
Excessive details in blog post: blog.cloudflare.com/unpacking-cl...
Excessive details in blog post: blog.cloudflare.com/unpacking-cl...
October 14, 2025 at 8:40 PM
Those benchmarks from @t3.gg revealed some interesting issues in Workers. Happy to say it's all fixed now, save for some lingering next.js-specific stuff we're continuing to work on. Thanks for the reproducible test cases, @t3.gg.
Excessive details in blog post: blog.cloudflare.com/unpacking-cl...
Excessive details in blog post: blog.cloudflare.com/unpacking-cl...
Next project: AI agent for investing.
Based on my own preferences and criteria for company fundamentals, combined with some trend following technical analysis and breakout detection from pivot points.
An MCP server to allow me to chat with the agent through LLMs, and web UI.
Based on my own preferences and criteria for company fundamentals, combined with some trend following technical analysis and breakout detection from pivot points.
An MCP server to allow me to chat with the agent through LLMs, and web UI.
October 8, 2025 at 11:08 AM
Next project: AI agent for investing.
Based on my own preferences and criteria for company fundamentals, combined with some trend following technical analysis and breakout detection from pivot points.
An MCP server to allow me to chat with the agent through LLMs, and web UI.
Based on my own preferences and criteria for company fundamentals, combined with some trend following technical analysis and breakout detection from pivot points.
An MCP server to allow me to chat with the agent through LLMs, and web UI.
I still need to get better at this.
October 8, 2025 at 8:12 AM
I still need to get better at this.
Reposted by Lambros Petrou
I started reading software blogs before I got my first programming job 20 years ago. At this point, I’ve read thousands of blog posts and essays about software, but only a small handful stuck in my mind and changed the way I think. refactoringenglish.com/blog/softwar...
The Software Essays that Shaped Me
I started reading software blogs before I got my first programming job 20 years ago. At this point, I've read thousands of blog posts and essays, but a small handful stuck in my mind and changed the w...
refactoringenglish.com
October 2, 2025 at 6:56 PM
I started reading software blogs before I got my first programming job 20 years ago. At this point, I’ve read thousands of blog posts and essays about software, but only a small handful stuck in my mind and changed the way I think. refactoringenglish.com/blog/softwar...
I have been listening to the Market Wizards books by Jack Schwager and I loved them.
It does make investing and trading seeming like a skill that needs a lot of work, consistency, patience, and risk management.
However, not a single strategy is best. It depends on your character.
It does make investing and trading seeming like a skill that needs a lot of work, consistency, patience, and risk management.
However, not a single strategy is best. It depends on your character.
September 17, 2025 at 6:45 PM
I have been listening to the Market Wizards books by Jack Schwager and I loved them.
It does make investing and trading seeming like a skill that needs a lot of work, consistency, patience, and risk management.
However, not a single strategy is best. It depends on your character.
It does make investing and trading seeming like a skill that needs a lot of work, consistency, patience, and risk management.
However, not a single strategy is best. It depends on your character.
Reposted by Lambros Petrou
Reliability is sort of like a stomachache. It’s hard for people to really appreciate not having issues until you have issues.
September 4, 2025 at 3:13 PM
Reliability is sort of like a stomachache. It’s hard for people to really appreciate not having issues until you have issues.
Share your best resources, articles, publications, talks, about "AI in Databases and Storage products".
I imagine some applications are for query optimization.
What else is already being explored or would benefit from AI? Infrastructure or application level.
I imagine some applications are for query optimization.
What else is already being explored or would benefit from AI? Infrastructure or application level.
September 3, 2025 at 8:03 AM
Share your best resources, articles, publications, talks, about "AI in Databases and Storage products".
I imagine some applications are for query optimization.
What else is already being explored or would benefit from AI? Infrastructure or application level.
I imagine some applications are for query optimization.
What else is already being explored or would benefit from AI? Infrastructure or application level.
Finally updated the #SkybearNET landing page with the Insights feature that's been out for several weeks, and some stylistic changes.
New pricing as well.😉
www.skybear.net
New pricing as well.😉
www.skybear.net
August 31, 2025 at 9:35 AM
Finally updated the #SkybearNET landing page with the Insights feature that's been out for several weeks, and some stylistic changes.
New pricing as well.😉
www.skybear.net
New pricing as well.😉
www.skybear.net
I mentioned a few times that DynamoDB is among my favourite databases. I collected my favourite articles, videos, and its papers into a single place.
Great to go through and learn the internals of DynamoDB.
Let me know if I missed something.
www.lambrospetrou.com/articles/dyn...
Great to go through and learn the internals of DynamoDB.
Let me know if I missed something.
www.lambrospetrou.com/articles/dyn...
Amazon DynamoDB references | Lambros Petrou
Various references to Amazon DynamoDB's architecture, publications, articles, videos.
www.lambrospetrou.com
August 19, 2025 at 10:28 PM
I mentioned a few times that DynamoDB is among my favourite databases. I collected my favourite articles, videos, and its papers into a single place.
Great to go through and learn the internals of DynamoDB.
Let me know if I missed something.
www.lambrospetrou.com/articles/dyn...
Great to go through and learn the internals of DynamoDB.
Let me know if I missed something.
www.lambrospetrou.com/articles/dyn...
BlueSky wants me to verify my age (seems to be a new UK law), and the provider they use failed at least 4 times today in different times.
If you force a check on your users, make sure it works first.😮💨
If you force a check on your users, make sure it works first.😮💨
August 18, 2025 at 10:42 PM
BlueSky wants me to verify my age (seems to be a new UK law), and the provider they use failed at least 4 times today in different times.
If you force a check on your users, make sure it works first.😮💨
If you force a check on your users, make sure it works first.😮💨
"Investing in 3x Daily Leveraged Nasdaq 100 ETFs (TQQQ or QQQ3) using QQQ weekly MACD signals" 💸
I have written down the strategy I have been researching and backtesting over the past few months.
I wish history repeats.😅
www.lambrospetrou.com/articles/inv...
I have written down the strategy I have been researching and backtesting over the past few months.
I wish history repeats.😅
www.lambrospetrou.com/articles/inv...
August 18, 2025 at 10:19 PM
"Investing in 3x Daily Leveraged Nasdaq 100 ETFs (TQQQ or QQQ3) using QQQ weekly MACD signals" 💸
I have written down the strategy I have been researching and backtesting over the past few months.
I wish history repeats.😅
www.lambrospetrou.com/articles/inv...
I have written down the strategy I have been researching and backtesting over the past few months.
I wish history repeats.😅
www.lambrospetrou.com/articles/inv...
Future in 20XX. Custom UI (websites, apps) doesn't matter anymore, at all. All devices directly handle multimodal input, and based on "intents" the service's APIs are called, and the response is converted to visual/audio/feeling (e.g. vibrations).
Hardware + APIs + Data, wins.
Hardware + APIs + Data, wins.
August 2, 2025 at 9:09 AM
Future in 20XX. Custom UI (websites, apps) doesn't matter anymore, at all. All devices directly handle multimodal input, and based on "intents" the service's APIs are called, and the response is converted to visual/audio/feeling (e.g. vibrations).
Hardware + APIs + Data, wins.
Hardware + APIs + Data, wins.
Reposted by Lambros Petrou
😎 Super happy to announce Hurl 7.0.0!
✅ better ways to checks every step of redirections
✅ new filters to templatize HTTP request and response
✅ new curl options supported, --max-time / request, --ntml, --negotiate, --pinnedpubkey
=> hurl.dev/blog/2025/07...
✅ better ways to checks every step of redirections
✅ new filters to templatize HTTP request and response
✅ new curl options supported, --max-time / request, --ntml, --negotiate, --pinnedpubkey
=> hurl.dev/blog/2025/07...
Announcing Hurl 7.0.0
hurl.dev
July 31, 2025 at 3:36 PM
😎 Super happy to announce Hurl 7.0.0!
✅ better ways to checks every step of redirections
✅ new filters to templatize HTTP request and response
✅ new curl options supported, --max-time / request, --ntml, --negotiate, --pinnedpubkey
=> hurl.dev/blog/2025/07...
✅ better ways to checks every step of redirections
✅ new filters to templatize HTTP request and response
✅ new curl options supported, --max-time / request, --ntml, --negotiate, --pinnedpubkey
=> hurl.dev/blog/2025/07...
Assuming you have an initial capital of 200K USD.
What gets you to at least 2 million USD in the bank faster and more probable?
A) Investing/Trading vs B) Building a business (3y+ horizon)?
What gets you to at least 2 million USD in the bank faster and more probable?
A) Investing/Trading vs B) Building a business (3y+ horizon)?
July 30, 2025 at 6:02 PM
Assuming you have an initial capital of 200K USD.
What gets you to at least 2 million USD in the bank faster and more probable?
A) Investing/Trading vs B) Building a business (3y+ horizon)?
What gets you to at least 2 million USD in the bank faster and more probable?
A) Investing/Trading vs B) Building a business (3y+ horizon)?
Reposted by Lambros Petrou
“$110M a year on AWS? I could do it for half!”
Bro, your last infra project was making a cron job email you weather updates.
Sit down.
www.duckbillgroup.com/blog/figmas-...
Bro, your last infra project was making a cron job email you weather updates.
Sit down.
www.duckbillgroup.com/blog/figmas-...
Figma's $300k Daily AWS Bill Isn't the Scandal You Think It Is
Well, the internet did what the internet does best this week: it collectively lost its mind over a number in an S-1 filing. Figma disclosed they signed a ~$550 million contract with AWS, someone used ...
www.duckbillgroup.com
July 10, 2025 at 11:05 PM
“$110M a year on AWS? I could do it for half!”
Bro, your last infra project was making a cron job email you weather updates.
Sit down.
www.duckbillgroup.com/blog/figmas-...
Bro, your last infra project was making a cron job email you weather updates.
Sit down.
www.duckbillgroup.com/blog/figmas-...
I finally got some time to implement the "Per Request" insights for #SkybearNET.
You can now drill down at the request level and figure out how your API is behaving, latency timings (DNS, TCP connect, transfer, and total duration), alongside response body sizes and status.
You can now drill down at the request level and figure out how your API is behaving, latency timings (DNS, TCP connect, transfer, and total duration), alongside response body sizes and status.
July 6, 2025 at 12:30 PM
I finally got some time to implement the "Per Request" insights for #SkybearNET.
You can now drill down at the request level and figure out how your API is behaving, latency timings (DNS, TCP connect, transfer, and total duration), alongside response body sizes and status.
You can now drill down at the request level and figure out how your API is behaving, latency timings (DNS, TCP connect, transfer, and total duration), alongside response body sizes and status.
"As AI expands, the real opportunity is to find a way to use human effort to create more value. [...]
What we do have is agency over how we’ll thrive in a world where human work is being redefined.
Either you work for an AI or AI works for you."
seths.blog/2025/07/prod...
What we do have is agency over how we’ll thrive in a world where human work is being redefined.
Either you work for an AI or AI works for you."
seths.blog/2025/07/prod...
Productivity, AI and pushback
Typesetters did not like the laser printer. Wedding photographers still hate the iphone. And some musicians are outraged that AI is now making mediocre pop music. One group of esteemed authors is d…
seths.blog
July 2, 2025 at 6:53 PM
"As AI expands, the real opportunity is to find a way to use human effort to create more value. [...]
What we do have is agency over how we’ll thrive in a world where human work is being redefined.
Either you work for an AI or AI works for you."
seths.blog/2025/07/prod...
What we do have is agency over how we’ll thrive in a world where human work is being redefined.
Either you work for an AI or AI works for you."
seths.blog/2025/07/prod...
I am a hard core fan of Claude 4 and Claude Code, but using jules.google.com for easy changes without having to leave the browser is super nice too!
Need to set up my remote access to Claude Code through Tailscale, but Jules is sufficient for quick things.
Need to set up my remote access to Claude Code through Tailscale, but Jules is sufficient for quick things.
Sign in - Google Accounts
jules.google.com
June 29, 2025 at 1:30 PM
I am a hard core fan of Claude 4 and Claude Code, but using jules.google.com for easy changes without having to leave the browser is super nice too!
Need to set up my remote access to Claude Code through Tailscale, but Jules is sufficient for quick things.
Need to set up my remote access to Claude Code through Tailscale, but Jules is sufficient for quick things.
Reposted by Lambros Petrou
I decided to record a talk on agentic programming and why I'm so damn addicted to this. I think there are a few useful things in it, but I'm sure in a month this will be outdated :) www.youtube.com/watch?v=nfOV...
Agentic Coding: The Future of Software Development with Agents
YouTube video by Armin Ronacher
www.youtube.com
June 28, 2025 at 11:37 PM
I decided to record a talk on agentic programming and why I'm so damn addicted to this. I think there are a few useful things in it, but I'm sure in a month this will be outdated :) www.youtube.com/watch?v=nfOV...
"Logistician - ISTJ" sounded wrong initially, but the more I read about it, the more it fits me. I expected the "Architect - INTJ" type, and in hindsight I can even trace back to the questions that probably tipped me over.
I find this personality test not to be very bullshity.😅
I find this personality test not to be very bullshity.😅
June 29, 2025 at 9:42 AM
"Logistician - ISTJ" sounded wrong initially, but the more I read about it, the more it fits me. I expected the "Architect - INTJ" type, and in hindsight I can even trace back to the questions that probably tipped me over.
I find this personality test not to be very bullshity.😅
I find this personality test not to be very bullshity.😅
"Not everything that can be counted counts. Not everything that counts can be counted."
- William Bruce Cameron
- William Bruce Cameron
June 21, 2025 at 9:02 PM
"Not everything that can be counted counts. Not everything that counts can be counted."
- William Bruce Cameron
- William Bruce Cameron
💡 Shower idea, "ATTACHITE: SQLite files coordinator across servers".
You like servers (VPS), and want to be able to use more than 1 machine. Shard your dataset across N SQLite files (N>=120). ΑTTACH them to the app to query across them. Grow by moving files to new servers.
You like servers (VPS), and want to be able to use more than 1 machine. Shard your dataset across N SQLite files (N>=120). ΑTTACH them to the app to query across them. Grow by moving files to new servers.
June 19, 2025 at 8:39 AM
💡 Shower idea, "ATTACHITE: SQLite files coordinator across servers".
You like servers (VPS), and want to be able to use more than 1 machine. Shard your dataset across N SQLite files (N>=120). ΑTTACH them to the app to query across them. Grow by moving files to new servers.
You like servers (VPS), and want to be able to use more than 1 machine. Shard your dataset across N SQLite files (N>=120). ΑTTACH them to the app to query across them. Grow by moving files to new servers.
I love these simple and fun sites. Would pick one over those purple gradient websites any day.
pointerpointer.com
pointerpointer.com
pointerpointer.com
Please hold still while we locate your pointer...
pointerpointer.com
June 14, 2025 at 4:07 PM
I love these simple and fun sites. Would pick one over those purple gradient websites any day.
pointerpointer.com
pointerpointer.com
Since you cannot do any work, visit www.skybear.net and let me know what you wish an HTTP Synthetic testing platform should offer in addition to that.😅
Skybear.NET - Automate your HTTP API tests
Skybear.NET is a managed platform automating Synthetic HTTP API testing. Get started today, ensure your APIs work. Always!
www.skybear.net
June 12, 2025 at 7:22 PM
Since you cannot do any work, visit www.skybear.net and let me know what you wish an HTTP Synthetic testing platform should offer in addition to that.😅