Nicolas Beaussart
@beaussan.io
I like to build stuff - father of two 👦👦 - Teacher, Tinkerer, Cook - Senior Staff at @PayFitEng - TanStack router maintainer - Nx Champion 🏆 - @traefik Ambassador
Cut our ownership providers from 245 → 3 using @tanstack.com Router's staticData API 🧹
Route-level ownership that TypeScript enforces at compile time. Shared layouts just work. Your IDE tells you when you forgot to assign a team.
Type-first routing is a game changer 🌅
beaussan.io/blog/runtime...
Route-level ownership that TypeScript enforces at compile time. Shared layouts just work. Your IDE tells you when you forgot to assign a team.
Type-first routing is a game changer 🌅
beaussan.io/blog/runtime...
Runtime Ownership Made Simple with TanStack Router
Route-level ownership that your IDE can actually enforce
beaussan.io
January 9, 2026 at 10:24 AM
Cut our ownership providers from 245 → 3 using @tanstack.com Router's staticData API 🧹
Route-level ownership that TypeScript enforces at compile time. Shared layouts just work. Your IDE tells you when you forgot to assign a team.
Type-first routing is a game changer 🌅
beaussan.io/blog/runtime...
Route-level ownership that TypeScript enforces at compile time. Shared layouts just work. Your IDE tells you when you forgot to assign a team.
Type-first routing is a game changer 🌅
beaussan.io/blog/runtime...
Wrote up how to integrate TanStack Router with Datadog RUM after reverse-engineering their codebase
tldr: subscribe to onResolved, track views manually, get proper route grouping
No wrappers needed, just a clean subscription pattern : beaussan.io/blog/datadog...
tldr: subscribe to onResolved, track views manually, get proper route grouping
No wrappers needed, just a clean subscription pattern : beaussan.io/blog/datadog...
TanStack Router + Datadog RUM: How to?
A practical guide to integrating Datadog RUM with TanStack Router for better monitoring.
beaussan.io
January 4, 2026 at 7:25 PM
Wrote up how to integrate TanStack Router with Datadog RUM after reverse-engineering their codebase
tldr: subscribe to onResolved, track views manually, get proper route grouping
No wrappers needed, just a clean subscription pattern : beaussan.io/blog/datadog...
tldr: subscribe to onResolved, track views manually, get proper route grouping
No wrappers needed, just a clean subscription pattern : beaussan.io/blog/datadog...
After a couple of months, I'm happy to share that @payfiteng.bsky.social main app is now running on @tanstack.com router (250+ routes)!🎉
This allowed us to have a snappier app, typesafe routing and found a couple of bugs thanks to better types!
I am planning an article about the approach 🔜
This allowed us to have a snappier app, typesafe routing and found a couple of bugs thanks to better types!
I am planning an article about the approach 🔜
December 10, 2025 at 4:40 PM
After a couple of months, I'm happy to share that @payfiteng.bsky.social main app is now running on @tanstack.com router (250+ routes)!🎉
This allowed us to have a snappier app, typesafe routing and found a couple of bugs thanks to better types!
I am planning an article about the approach 🔜
This allowed us to have a snappier app, typesafe routing and found a couple of bugs thanks to better types!
I am planning an article about the approach 🔜
We're hiring a senior frontend eng for my team 🎯
looking for someone who wants to:
- scale FE systems for 100+ engineers
- mentor & grow engineering talent
- drive architectural decisions
- work with typescript, react, vite, monorepos
📍 France or Spain only
careers.payfit.com/jobs/6886605...
looking for someone who wants to:
- scale FE systems for 100+ engineers
- mentor & grow engineering talent
- drive architectural decisions
- work with typescript, react, vite, monorepos
📍 France or Spain only
careers.payfit.com/jobs/6886605...
Senior Software Engineer - Front-end Framework - PayFit
Join us!
careers.payfit.com
December 5, 2025 at 11:51 AM
We're hiring a senior frontend eng for my team 🎯
looking for someone who wants to:
- scale FE systems for 100+ engineers
- mentor & grow engineering talent
- drive architectural decisions
- work with typescript, react, vite, monorepos
📍 France or Spain only
careers.payfit.com/jobs/6886605...
looking for someone who wants to:
- scale FE systems for 100+ engineers
- mentor & grow engineering talent
- drive architectural decisions
- work with typescript, react, vite, monorepos
📍 France or Spain only
careers.payfit.com/jobs/6886605...
Introducing, tanstack ai! tanstack.com/blog/tanstac...
It's been hard to keep it a secret, but I've loved seeing the tanstack team assemble around this new library to make it awesome! Check it out
It's been hard to keep it a secret, but I've loved seeing the tanstack team assemble around this new library to make it awesome! Check it out
TanStack AI Alpha: Your AI, Your Way | TanStack Blog
The TanStack team is excited to announce the alpha release of , a framework-agnostic AI toolkit built for developers who want control over their stack. Let's be honest. The current AI landscape has a....
tanstack.com
December 5, 2025 at 5:37 AM
Introducing, tanstack ai! tanstack.com/blog/tanstac...
It's been hard to keep it a secret, but I've loved seeing the tanstack team assemble around this new library to make it awesome! Check it out
It's been hard to keep it a secret, but I've loved seeing the tanstack team assemble around this new library to make it awesome! Check it out
Reposted by Nicolas Beaussart
Path matching in a router? How hard can it be 🤷♂️.
Hard to do correctly. Very hard to do fast on top of that. This is a great blog post about the recent core refactoring done in @tanstack.com router 🔥
Hard to do correctly. Very hard to do fast on top of that. This is a great blog post about the recent core refactoring done in @tanstack.com router 🔥
How we accidentally made route matching more performant by aiming for correctness | TanStack Blog
We achieved a 20,000× performance improvement in route matching in TanStack Router. Let's be honest, this is definitely cherry-picked, but the number is real and comes from a real production applicati...
tanstack.com
November 20, 2025 at 8:40 PM
Path matching in a router? How hard can it be 🤷♂️.
Hard to do correctly. Very hard to do fast on top of that. This is a great blog post about the recent core refactoring done in @tanstack.com router 🔥
Hard to do correctly. Very hard to do fast on top of that. This is a great blog post about the recent core refactoring done in @tanstack.com router 🔥
Reposted by Nicolas Beaussart
Prisma 7 is here!
🦀 Rust-free Prisma Client as the default
💪 90% smaller bundle size & 3x faster queries
🔌 Direct connections to Prisma Postgres
We've been building towards this for months, so let's see what's in this release 🧵
🦀 Rust-free Prisma Client as the default
💪 90% smaller bundle size & 3x faster queries
🔌 Direct connections to Prisma Postgres
We've been building towards this for months, so let's see what's in this release 🧵
November 19, 2025 at 2:43 PM
Prisma 7 is here!
🦀 Rust-free Prisma Client as the default
💪 90% smaller bundle size & 3x faster queries
🔌 Direct connections to Prisma Postgres
We've been building towards this for months, so let's see what's in this release 🧵
🦀 Rust-free Prisma Client as the default
💪 90% smaller bundle size & 3x faster queries
🔌 Direct connections to Prisma Postgres
We've been building towards this for months, so let's see what's in this release 🧵
Reposted by Nicolas Beaussart
oops I missed the outage, I was too busy writing in Obsidian
November 18, 2025 at 4:23 PM
oops I missed the outage, I was too busy writing in Obsidian
Reposted by Nicolas Beaussart
🤔 What if there were a conference without talks? Just hanging out with OSS maintainers & builders, seeing what they’re working on, and learning cool stuff by actually talking to people.
🤯 What if hallway track turned into the whole event!
💡 @tannerlinsley.com is exploring it. Interested? ⬇️
🤯 What if hallway track turned into the whole event!
💡 @tannerlinsley.com is exploring it. Interested? ⬇️
Web Forge Conf - A new kind of web developer conference
A community funded, not for profit event built for creators and the developers who use their work. Less stage. More story. All signal.
webforgeconf.com
November 13, 2025 at 9:36 AM
🤔 What if there were a conference without talks? Just hanging out with OSS maintainers & builders, seeing what they’re working on, and learning cool stuff by actually talking to people.
🤯 What if hallway track turned into the whole event!
💡 @tannerlinsley.com is exploring it. Interested? ⬇️
🤯 What if hallway track turned into the whole event!
💡 @tannerlinsley.com is exploring it. Interested? ⬇️
There is some opportunities that feels unreal. This is one of them! I've joined the TanStack Router team to keep pushing the boundaries of typescript and routing!
Huge thanks to @manuelschiller.bsky.social and @tannerlinsley.com for their trust ❤️
Huge thanks to @manuelschiller.bsky.social and @tannerlinsley.com for their trust ❤️
November 4, 2025 at 9:15 AM
There is some opportunities that feels unreal. This is one of them! I've joined the TanStack Router team to keep pushing the boundaries of typescript and routing!
Huge thanks to @manuelschiller.bsky.social and @tannerlinsley.com for their trust ❤️
Huge thanks to @manuelschiller.bsky.social and @tannerlinsley.com for their trust ❤️
Reposted by Nicolas Beaussart
I am looking for a full-time job.
Being independent in open source for 3.5+ years has been wonderful. I've gotten done most of the high-level goals I wanted to, and miss having people & structure around me.
If you know of a role for a staff-level TypeScript+web developer, let me know! 🙂
Being independent in open source for 3.5+ years has been wonderful. I've gotten done most of the high-level goals I wanted to, and miss having people & structure around me.
If you know of a role for a staff-level TypeScript+web developer, let me know! 🙂
October 30, 2025 at 2:40 PM
I am looking for a full-time job.
Being independent in open source for 3.5+ years has been wonderful. I've gotten done most of the high-level goals I wanted to, and miss having people & structure around me.
If you know of a role for a staff-level TypeScript+web developer, let me know! 🙂
Being independent in open source for 3.5+ years has been wonderful. I've gotten done most of the high-level goals I wanted to, and miss having people & structure around me.
If you know of a role for a staff-level TypeScript+web developer, let me know! 🙂
I'm really struggling with @pnpm.io , especially around libs that are duplicated since peer are resolved to different version, and singleton instance (like vitest snapshots) breaks... 😢
Is there a secret or override all the things ?
pnpm.io/how-peers-ar...
Is there a secret or override all the things ?
pnpm.io/how-peers-ar...
How peers are resolved | pnpm
One of the best features of pnpm is that in one project, a specific version of a
pnpm.io
October 13, 2025 at 8:46 PM
I'm really struggling with @pnpm.io , especially around libs that are duplicated since peer are resolved to different version, and singleton instance (like vitest snapshots) breaks... 😢
Is there a secret or override all the things ?
pnpm.io/how-peers-ar...
Is there a secret or override all the things ?
pnpm.io/how-peers-ar...
Reposted by Nicolas Beaussart
📚 Continued writing about @tanstack.com Router this weekend, trying to explain one of the imo best features the router has to offer: Context Inheritance that works in a fully inferred type-safe way across nested routes 🔥
Context Inheritance in TanStack Router
An overview of how TanStack Router automatically shares and infers path params, search params, and context between nested routes in a type-safe way.
tkdodo.eu
October 12, 2025 at 6:52 PM
📚 Continued writing about @tanstack.com Router this weekend, trying to explain one of the imo best features the router has to offer: Context Inheritance that works in a fully inferred type-safe way across nested routes 🔥
Let's make the web fun again!
September 24, 2025 at 4:25 PM
Let's make the web fun again!
Like every couple of weeks, I try @rolldown.rs @vite.dev on PayFit's frontend codebase, but this time, it's all green 🎉
And the stats are pretty impressive, from 2m builds down to 8s ! All of that, with nearly no config change (just a polyfill plugin). Maybe it's time to run it in prod 🎉
And the stats are pretty impressive, from 2m builds down to 8s ! All of that, with nearly no config change (just a polyfill plugin). Maybe it's time to run it in prod 🎉
September 22, 2025 at 9:40 PM
Like every couple of weeks, I try @rolldown.rs @vite.dev on PayFit's frontend codebase, but this time, it's all green 🎉
And the stats are pretty impressive, from 2m builds down to 8s ! All of that, with nearly no config change (just a polyfill plugin). Maybe it's time to run it in prod 🎉
And the stats are pretty impressive, from 2m builds down to 8s ! All of that, with nearly no config change (just a polyfill plugin). Maybe it's time to run it in prod 🎉
I've loved the digital edition, but I always like a physical editions of the books I've enjoyed a lot!
If you have to deal with legacy codebase, this book is full of actionable and useful tips!
Thanks a lot @nicoespeon.com for writing this!
If you have to deal with legacy codebase, this book is full of actionable and useful tips!
Thanks a lot @nicoespeon.com for writing this!
August 29, 2025 at 11:44 AM
I've loved the digital edition, but I always like a physical editions of the books I've enjoyed a lot!
If you have to deal with legacy codebase, this book is full of actionable and useful tips!
Thanks a lot @nicoespeon.com for writing this!
If you have to deal with legacy codebase, this book is full of actionable and useful tips!
Thanks a lot @nicoespeon.com for writing this!
Today marks another year on this planet and I'm grateful for my life and the friends I've made along the way ❤️
August 25, 2025 at 4:10 PM
Today marks another year on this planet and I'm grateful for my life and the friends I've made along the way ❤️
Reposted by Nicolas Beaussart
August 22, 2025 at 9:21 PM
Isaac is an awesome person, very knowledgeable and now, on the market! If you run large monorepos, or codebases in general, I'm sure he will be able to help you out!
I'm offering free 30 minute @nx.dev configuration assessments! DM me with details about your repo and I'll send you a scheduling link.
Last week, I was laid off by Nx, so I get to do what I enjoy doing for now. I'll keep going until I don't want to any more.
Last week, I was laid off by Nx, so I get to do what I enjoy doing for now. I'll keep going until I don't want to any more.
August 11, 2025 at 2:54 PM
Isaac is an awesome person, very knowledgeable and now, on the market! If you run large monorepos, or codebases in general, I'm sure he will be able to help you out!
And that 2h was from last October!
Now we are at 20 minutes from branch pushed to deployed!
Including merge, dev, staging, e2e and prod deployment 😍
Read more about the story on the Nx blog
Now we are at 20 minutes from branch pushed to deployed!
Including merge, dev, staging, e2e and prod deployment 😍
Read more about the story on the Nx blog
PayFit achieved incredible results with a strategic approach to introducing monorepos in their organization.
✅ 5 days → 2 hours deployment time
✅ 75% faster coding
✅ 100% of teams now want to migrate back
Here's the full story
nx.dev/blog/payfit...
✅ 5 days → 2 hours deployment time
✅ 75% faster coding
✅ 100% of teams now want to migrate back
Here's the full story
nx.dev/blog/payfit...
From 5 Days to 2 Hours: How PayFit Accelerated Time to Market with Strategic Nx Implementation
Discover how a 4-person platform team at Payfit turned monorepo abandonment into a competitive advantage using strategic Nx implementation.
nx.dev
July 24, 2025 at 10:06 PM
And that 2h was from last October!
Now we are at 20 minutes from branch pushed to deployed!
Including merge, dev, staging, e2e and prod deployment 😍
Read more about the story on the Nx blog
Now we are at 20 minutes from branch pushed to deployed!
Including merge, dev, staging, e2e and prod deployment 😍
Read more about the story on the Nx blog
Reposted by Nicolas Beaussart
📚 Finally found the time to write about what I think the best parts about @tanstack.com Router are. Yes, type-safety (duh), but there is so much more to talk about. Honestly, coupled with React Query, this is the most productive stack I’ve ever worked with 🚀
The Beauty of TanStack Router
Yes, it's type-safe, but there's so much more to love about TanStack Router.
tkdodo.eu
May 25, 2025 at 2:44 PM
📚 Finally found the time to write about what I think the best parts about @tanstack.com Router are. Yes, type-safety (duh), but there is so much more to talk about. Honestly, coupled with React Query, this is the most productive stack I’ve ever worked with 🚀
🎉 Excited to share that I've been promoted to Senior Staff Engineer @payfiteng.bsky.social !
Proud to have helped transform our frontend platform into one of our best developer experiences. Here's to the next chapter! 💪
Proud to have helped transform our frontend platform into one of our best developer experiences. Here's to the next chapter! 💪
May 9, 2025 at 3:38 PM
🎉 Excited to share that I've been promoted to Senior Staff Engineer @payfiteng.bsky.social !
Proud to have helped transform our frontend platform into one of our best developer experiences. Here's to the next chapter! 💪
Proud to have helped transform our frontend platform into one of our best developer experiences. Here's to the next chapter! 💪
Reposted by Nicolas Beaussart
May 8, 2025 at 6:51 AM
I'm hearing more and more news like that, I'm not sure about attending us based conference or applying to CFPs 😢
The front page of the leading Hungarian news site today.
A Hungarian software engineer decided to visit his aunt in the US (who lives there on a green card), work remote while visiting, and fly back 2.5 months later (return flight booked)
Interrogated, arrested and sent back.
A Hungarian software engineer decided to visit his aunt in the US (who lives there on a green card), work remote while visiting, and fly back 2.5 months later (return flight booked)
Interrogated, arrested and sent back.
April 19, 2025 at 1:04 PM
I'm hearing more and more news like that, I'm not sure about attending us based conference or applying to CFPs 😢
Reposted by Nicolas Beaussart
“Empathy is a fundamental weakness of our society” - Elon Musk
April 15, 2025 at 3:02 PM
“Empathy is a fundamental weakness of our society” - Elon Musk