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Sebastián Ramírez

@tiangolo.com
2.7K followers 48 following 309 posts

Creator of @fastapi.tiangolo.com, Typer, SQLModel, Asyncer, etc 🚀 From 🇨🇴 in 🇩🇪 Open Source, APIs, and tools for data/ML 🤖 Building @fastapicloud.com ⚡️

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Sebastián Ramírez @tiangolo.com · 8h
I think this is big. 🌠 FastAPI's objective is to provide what you always need for real prod apps. And not provide what you don't. You always want metrics, there's just not enough time to always set it all up. Now it's just there, by default.
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Sebastián Ramírez @tiangolo.com · 23h
The new official Redis SDK for FastAPI is so cool! Come and see it in action. 🚀
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Sebastián Ramírez @tiangolo.com · 24/09/2026
I will keep reviewing and adjusting any AI generated code until the models can consistently one-shot produce something I would consider acceptable. I haven't been able to just "trust the model". But anyway, trust is earned, applies to humans, companies, products, AI.
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Sebastián Ramírez @tiangolo.com · 23/09/2026
SQLModel 0.0.47 adds direct support for Postgres, MySQL, MariaDB 🐘 sqlmodel.tiangolo.com (It was already supported via SQLAlchemy, but now all the SQLModel tests run with each DB)
sqlmodel.tiangolo.com
SQLModel
SQLModel, SQL databases in Python, designed for simplicity, compatibility, and robustness.
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FastAPI @fastapi.tiangolo.com · 22/09/2026
Talk update 🎙️ François Voron is bringing a new topic to FastAPI Conf 2026: You don’t need /v2: API Versioning with FastAPI Come and learn the latest tricks from Polar.sh, including a custom SDK for clients, based on the new FastAPI versioning system 🤖 fastapiconf.com/speakers/#fr...
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FastAPI Cloud @fastapicloud.com · 22/09/2026
In FastAPI Cloud, you get the fastest Python distribution for your FastAPI apps by default ⚡️ (x.com/charliermars...)
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Sebastián Ramírez @tiangolo.com · 21/09/2026
A couple of SQLModel releases in a row, latest is 0.0.45 ✨ Potentially breaking change: datetime now uses UTC by default (as it should be) 🚨 sqlmodel.tiangolo.com/advanced/dat...
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Sebastián Ramírez @tiangolo.com · 19/09/2026
Very interesting idea by @seldo.com to solve open source funding. Have PyPI and npm be the ones to charge corporates for downloads and distribute it to maintainers. I like several aspects, I would pay if I was charged. seldo.com/posts/nobody...
seldo.com
Nobody pays for open source. We can force them to. | Seldo.com
Thirty years of voluntary funding schemes haven't paid open source maintainers because asking doesn't scale. The real money already flows — to JFrog, Docker, Sonatype — at the registry layer. The fix:...
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Sebastián Ramírez @tiangolo.com · 18/09/2026
I bet we'll get many "simple" tricks that are not always obvious and leave you thinking "wait, you can just do that?" ☕️
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Sebastián Ramírez @tiangolo.com · 17/09/2026
Welcome back dear softmax, what jev been doin?
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Sebastián Ramírez @tiangolo.com · 15/09/2026
That's crazy!!! (as @marcelotryle.bsky.social would say) It's always very fun seeing Marcelo live, don't miss it. 🤙
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FastAPI @fastapi.tiangolo.com · 10/09/2026
Want your FastAPI Conf T-shirt in your size? 👕 Get your ticket and select your size by September 20! Tickets bought after that still include a T-shirt, but your size won't be guaranteed. Join us in Amsterdam! 🚲 fastapiconf.com
fastapiconf.com
FastAPI Conf 2026 · Amsterdam
A day of FastAPI with the people who build it. October 28, 2026, at the Transformatorhuis in Amsterdam.
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Sebastián Ramírez @tiangolo.com · 08/09/2026
I'm still amazed that @fastapi.tiangolo.com helps scientists around the planet access space telescope data. ✨ I'm really looking forward to this talk. 🤩
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Sebastián Ramírez @tiangolo.com · 03/09/2026
You really want to get more insights into how a mastermind like this thinks about code and AI. I definitely do.
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FastAPI @fastapi.tiangolo.com · 01/09/2026
The FastAPI full-stack template now comes with the agent skills (uvx library-skills) for FastAPI and SQLModel built in. You can create your project, point your agent to it, and it will be able to write modern and correct code with the libararies. github.com/fastapi/full...
github.com
GitHub - fastapi/full-stack-fastapi-template: Full-stack web application template with FastAPI, React, SQLModel, PostgreSQL, Vite, Tailwind CSS, shadcn/ui, FastAPI Cloud, and Docker Compose.
Full-stack web application template with FastAPI, React, SQLModel, PostgreSQL, Vite, Tailwind CSS, shadcn/ui, FastAPI Cloud, and Docker Compose. - fastapi/full-stack-fastapi-template
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FastAPI @fastapi.tiangolo.com · 31/08/2026
Come and learn how typing.Annotated works underneath from François Voron at FastAPI Conf. 🤓 Learn things you won't learn anywhere else. Join us in Amsterdam! 🚲️ fastapiconf.com/speakers/#fr...
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FastAPI @fastapi.tiangolo.com · 28/08/2026
A few days ago, the Early Bird tickets for FastAPI Conf got officially SOLD OUT! 🐦️ The response has been incredible. 🚀 If you’ve been thinking about joining us, don’t wait too long. 🏃‍♀️ Get your ticket: fastapiconf.com
fastapiconf.com
FastAPI Conf 2026 · Amsterdam
A day of FastAPI with the people who build it. October 28, 2026, at the Transformatorhuis in Amsterdam.
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Sebastián Ramírez @tiangolo.com · 27/08/2026
Finally, I can guide you to build a proper full-stack app, from scratch, until it's deployed to your users, in minutes. 🤏🚀 I've been working towards this for the past 10+ years. 😅 Now it's about continuous improvements and more planned features. 😎
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Sebastián Ramírez @tiangolo.com · 26/08/2026
I didn't see this coming. 👀 I always thought @fastapi.tiangolo.com should have more followers than me individually, but it hadn't happened yet. This makes more sense to me. 😅
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Sebastián Ramírez @tiangolo.com · 25/08/2026
One of the few friends I asked if it would make sense to build a cloud for @fastapi.tiangolo.com, in 2023 was @dynamicwebpaige.bsky.social She said "you have to, not only for humans, but for agents" This was way before we all used agents for coding And now at FastAPI Conf! So cool. Full circle. 💃
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FastAPI @fastapi.tiangolo.com · 24/08/2026
The full-stack FastAPI template now serves the React - TanStack frontend with FastAPI ✨ One single app, one single deployment, one single domain. No CORS fights and debugging. github.com/fastapi/full...
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FastAPI @fastapi.tiangolo.com · 22/08/2026
There are only a few early bird tickets left for FastAPI Conf 🤏 🐦 fastapiconf.com
fastapiconf.com
FastAPI Conf 2026 · Amsterdam
A day of FastAPI with the people who build it. October 28, 2026, at the Transformatorhuis in Amsterdam.
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Sebastián Ramírez @tiangolo.com · 21/08/2026
A bunch of improvements in development workflows and style for emails from Alejandra in the full-stack-fastapi-template, so you can create your app with the best baseline. ✨
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Sebastián Ramírez @tiangolo.com · 20/08/2026
Did you see the famous talk "Pydantic is all you need"? And how that ended up in AI Labs providing structured output? It seems Jason Liu is all you need! 🙌 (And we'll all keep making references to the Transformers paper until morale improves).
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FastAPI @fastapi.tiangolo.com · 18/08/2026
This is the last week to get your early bird tickets for FastAPI Conf, hurry! 🏃 Prices increase next week. 📈 Do you need to convince your boss? Use our convincifyinator: fastapiconf.com/convince-you...
fastapiconf.com
Convince Your Boss · FastAPI Conf 2026
Generate a personalized, business-focused letter to get your manager's approval to attend FastAPI Conf 2026 in Amsterdam.
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Sebastián Ramírez @tiangolo.com · 14/08/2026
I'm from Colombia 🇨🇴 It was hit by a heavy earthquake these past days. The damage is overwhelming, the loss unmeasurable. Many places I remember are now destroyed. Wishing strength for those who lost, and those helping others. Can you donate too? ⛑️ ayuda.cruzrojacolombiana.org
ayuda.cruzrojacolombiana.org
Emergencia Colombia Sismo
Emergencia Colombia Sismo
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Sebastián Ramírez @tiangolo.com · 13/08/2026
It was great to get a sense of how GitHub's security experts think, including how to react, when to act, where to draw the line. Even more important now that there's an overwhelming flood of AI generated reports consuming maintainer human effort. tiangolo.com/open-source/...
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FastAPI @fastapi.tiangolo.com · 13/08/2026
FastAPI Conf news! 📢 @marcelotryle.bsky.social , maintainer of Starlette and Uvicorn, the web components behind FastAPI, will join us as a speaker in Amsterdam! 🙌 Get your tickets: fastapiconf.com
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FastAPI @fastapi.tiangolo.com · 12/08/2026
Here's the full-stack-fastapi-template 0.12.0 🎁 More modern, simpler, easier. Too many improvements to fit here, but let's start: You can now simply click the "Use this template" button in GitHub to create a new repo, possibly private. ✨ github.com/fastapi/full...
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Sebastián Ramírez @tiangolo.com · 11/08/2026
Python is the most reviewable language 🐍
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Sebastián Ramírez @tiangolo.com · 10/08/2026
Remember this image from the James Webb space telescope? Wanna know how the science data here is transferred to scientists around the world using @fastapi.tiangolo.com ? And also the images we will see in January from The Roman Telescope (about to be launched). Come to FastAPI Conf. 🌠
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Sebastián Ramírez @tiangolo.com · 09/08/2026
Coding agent thingies extending what you can research and build combined with giving them FastAPI Cloud to deploy feels like such a superpower. First print("hello world") vibes ✨ I just replaced 50 GitHub personal access tokens with 3 apps, while making everything more secure.
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FastAPI @fastapi.tiangolo.com · 06/08/2026
Early Bird tickets for FastAPI Conf are still available, but only until August 23 🐓 Get yours before prices go up! 🎟️ You don't want to miss what we'll announce there 🤫 fastapiconf.com
fastapiconf.com
FastAPI Conf 2026 — Amsterdam
The premier conference for FastAPI developers. October 28, 2026 — Amsterdam.
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Sebastián Ramírez @tiangolo.com · 05/08/2026
Two hard problems in computer science: 1. cache invalidation 2. naming things @nucleonjohn.bsky.social is (very cleverly) taking care of the cache invalidation for you, so you can focus on naming your app. 🤓 You code. We cloud. ⚡️
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FastAPI @fastapi.tiangolo.com · 04/08/2026
New FastAPI Conf speaker! 📢 @sa.muelcolvin.com , creator and founder of @pydantic.dev ✨ FastAPI is built on top of Pydantic and the two ecosystems are a perfect match. Of course we had to have him! 🤝 Early bird ending soon, got your tickets? fastapiconf.com
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Sebastián Ramírez @tiangolo.com · 03/08/2026
Typer 0.27.1 fixes formatting of the epilog (if you use it) 🐛 Thanks @oxykodit.bsky.social ! 🙌 github.com/fastapi/typer
github.com
GitHub - fastapi/typer: Typer, build great CLIs. Easy to code. Based on Python type hints.
Typer, build great CLIs. Easy to code. Based on Python type hints. - fastapi/typer
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FastAPI @fastapi.tiangolo.com · 02/08/2026
The official Redis SDK for FastAPI now supports rate limits 🚀 The Redis team is doing a great job here 🙌 github.com/redis/fastap...
github.com
GitHub - redis/fastapi-redis-sdk: FastAPI SDK for Redis
FastAPI SDK for Redis. Contribute to redis/fastapi-redis-sdk development by creating an account on GitHub.
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Sebastián Ramírez @tiangolo.com · 31/07/2026
If you follow the FastAPI docs, you are probably hashing passwords with pwdlib, that's made by François! 🔒️
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FastAPI @fastapi.tiangolo.com · 29/07/2026
FastAPI 0.141.1 fixes router.frontend() support for dependencies setting headers or background tasks 🐛
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FastAPI @fastapi.tiangolo.com · 29/07/2026
FastAPI app.frontend() now supports local development 💻️ fastapi dev: a missing frontend directory only shows a warning 👨‍🔬 fastapi run: exits with an error instead 🚨 ✨ new default check_dir="auto" ✨ new env var FASTAPI_ENV="development" fastapi.tiangolo.com/tutorial/fro...
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FastAPI @fastapi.tiangolo.com · 29/07/2026
Several FastAPI bug-fix releases in a row, the latest is 0.140.13 🐞 fastapi.tiangolo.com/release-notes/
fastapi.tiangolo.com
Release Notes - FastAPI
FastAPI framework, high performance, easy to learn, fast to code, ready for production
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FastAPI @fastapi.tiangolo.com · 27/07/2026
Several memory improvements one after the next ⚡️ Get the latest FastAPI 0.140.7 🏃 github.com/fastapi/fast...
github.com
GitHub - fastapi/fastapi: FastAPI framework, high performance, easy to learn, fast to code, ready for production
FastAPI framework, high performance, easy to learn, fast to code, ready for production - fastapi/fastapi
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FastAPI Cloud @fastapicloud.com · 27/07/2026
Are you using Claude Code? Here's the official FastAPI Cloud plugin. 🤩 Build, debug and deploy to FastAPI Cloud, right from Claude Code... or let your agents do it for you. 😎 github.com/fastapicloud...
github.com
GitHub - fastapicloud/skills
Contribute to fastapicloud/skills development by creating an account on GitHub.
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FastAPI @fastapi.tiangolo.com · 24/07/2026
Memory improvements in FastAPI 0.140.0 ⚡️ Around 50% less memory usage 🐬 The benchmark says 16x improvement, but that's an extreme case. It will depend on your app and usage of dependencies. Thanks to ipeluffo for the investigation! 🤓
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Sebastián Ramírez @tiangolo.com · 23/07/2026
Looking for the official AI Agent Skills? Find them in the docs 👇️ FastAPI: fastapi.tiangolo.com/tutorial/#ai... Typer: typer.tiangolo.com/tutorial/ins... SQLModel: sqlmodel.tiangolo.com/install/#ai-... Asyncer: asyncer.tiangolo.com/tutorial/ins...
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Sebastián Ramírez @tiangolo.com · 23/07/2026
It's wild that you can build and deploy an app with a proper backend ( @fastapi.tiangolo.com ), all from a chat. 🤯 Even on the web interface (ChatGPT Work). And it also helps you write better FastAPI code (even if not using @fastapicloud.com ). Amazing job by @patrick.wtf . 🙌
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Sebastián Ramírez @tiangolo.com · 21/07/2026
uv FTW, uv all the way 🌠
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Sebastián Ramírez @tiangolo.com · 20/07/2026
👀
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Sebastián Ramírez @tiangolo.com · 17/07/2026
Scale to zero to save on costs, or always-on to avoid cold starts entirely. You get to choose. 🕹️
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FastAPI @fastapi.tiangolo.com · 16/07/2026
Bug fixes! FastAPI 0.139.2 🐛
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