Marcio K

Just open-sourced Gust, our task orchestration system. Like Airflow, but faster and much more efficient, written in Elixir. Check it out! github.com/marciok/gust

The countdown to @ElixirConfEU has begun! Excited to share the stage with Elixir creator @josevalim, @chris_mccord from @elixirphoenix, and many other 10x engineers. I’ll be speaking about DAGs and durable workflows through a real story. Also bringing swag :)

@Yampeleg And most of them don't know what P = NP means 🫥

Everything is computer. Everyone is computer scientist. 2026.

@shaig What about AI companies buying dev tools? Right after announcing software dev is dead.. 😑

@WizLikeWizard Same here! I’ve just conclude my OpenClaw experiment. I’ve tried to use on my startup but no real gains. Overall it’s more of a toy for personal use.

Have been using OpenClaw for ~a month and it kinda sucks? I spend more time battling it to get basic crons fired reliably, remember things, and not repeat itself. Am I doing it wrong or are we just still very early on all of this?

@jxnlco Elixir -- Try it, it's addictive: process supervision, fault tolerance, hot code swapping, and speed. It's the sweet spot for AI.

Future of AI

AI secret sauce: Elixir ;)

@zeeg tks!

@MarcioK cra.mr/astro/gear

dust is enemy #1 right now

@GergelyOrosz WhatsApp secret sauce: Erlang :)

How did a tiny team of 30 engineers build WhatsApp, more than a decade ago? From Jean Lee, engineer #19 at the company. Timestamps: 00:00 Intro 01:39 Early years in tech 06:18 Becoming engineer #19 at WhatsApp 13:53 WhatsApp’s tech stack 18:09 WhatsApp’s unique ways of working 25:27 Countdown displays and outages 27:07 Why WhatsApp won 28:53 The Facebook acquisition 33:13 Life after acquisition 39:27 Working at Facebook in London 44:07 Transitioning to management 47:27 Performance reviews as a manager 53:29 After Facebook 58:53 AI’s impact on engineering 1:02:34 Jean’s advice to new grads and startups 1:06:45 Empowering employees 1:08:17 Book recommendations Watch or listen: • YouTube: youtu.be/5Kn32cIWPSY • Spotify: open.spotify.com/episode/56bXJZ… • Apple: podcasts.apple.com/us/podcast/bui… Brought to you by: • @statsig  – ⁠ The unified platform for flags, analytics, experiments, and more. statsig.com/pragmatic • @SonarSource – The makers of SonarQube, the industry standard for automated code review. sonarsource.com/pragmatic/ • @WorkOS – Everything you need to make your app enterprise ready WorkOS.com Three interesting observations from this episode: 1. WhatsApp had no code reviews after in-place. WhatsApp cofounder, Brian Acton, reviewed the very first pull request of each new hire, and after that, there were no more code reviews. Jean recounts how Brian reviewed her debut PR in extreme detail. This first (and only!) review set the bar high, and she wrote code to that standard from then on. 2. WhatsApp had close to zero formal processes. WhatsApp had no Scrum, no Agile, no TDD (test driven development), and no formal code reviews beyond the first commit. In contrast, Skype had 1,000 engineers and mandatory Scrum training, but WhatsApp still outcompeted it and won. Jean’s response to hearing of all the formal processes Skype used in order to execute faster: “I’m surprised to hear they thought they were shipping faster because of it.” Perhaps process is often a substitute for trust, not quality?” 3. Saying “no” to features was a competitive advantage. WhatsApp’s CEO, Jan Koum, rejected 99% of feature requests from the team. While competitors shipped dozens of shiny, new features, WhatsApp ruthlessly prioritized reliability and simplicity. Jan repeatedly told the team what the mission was. “I want a grandma living in the countryside to be able to use our app”, he said.

@himanshustwts OpenClaw fans / heavy users are typically non-developers who use it for personal purposes rather than work. Disclaimer: I am currently evaluating the user for my startup, and it's not going well :/

Dude are you kidding me

Also, importing credentials to the Mac mini could be more smooth and secure, like Rails does with an encrypted file and a key

After waiting for the dust to settle (and the renaming to stop 🙃), here are my 24 hrs with @openclaw as an assistant for my startup: ⤵️

Best part: it helped find a data inconsistency on my website and fix it, though I was very specific with the instructions.

The good: - Web browsing is extremely good. It even reads the NEXT.js JSON. - Lots of skills are available and easy to create. - It worked around limitations nicely: it couldn’t upload an image to Slack, so it uploaded to a private link instead.

@EvanJarman_ @gregisenberg Hi! Can you give an example?

@gregisenberg manus ai is a dark horse for automating backend workflows its ability to handle nuanced decision trees is a major differentiator most people sleep on it because it doesn't have a flashy ui

claude cowork and manus ai are probably two of the most underrated ai tools I can think of

@gregisenberg I think @openclaw took a big chunk out of @ManusAI. I used them for a few things here before moving to OpenClaw.

@zeeg I am only going to believe his word when an OpenAI or any other major lab openly shows how much of their code was written by AI. Most startups are ‘just’ specialized CRUD apps running on private data.

"thanks for giving me billions of dollars suckerssssss"

@nazzari Oi Bella! 😌

I'm looking for great founding engineers in the EU and LATAM. special callouts to 🇧🇷🇱🇺🇬🇧🇩🇪🇨🇴🇲🇽

DAGs are underrated for deterministic AI workflows (the non-agentic kind). In a few hours, I built a daily stock checker on Gust: - fetch market data - ask GPT, Gemini, Claude: buy / sell / hold - compute the votes - email the result via @Mail_Gun The code: github.com/marciok/gust/b…