Sebastien Castiel
@scastiel.dev
📍Montreal · I write about what I learn and build · Passionate software developer · https://scastiel.dev · My current project: https://spliit.app
Pinned
Sebastien Castiel
@scastiel.dev
· Aug 14
Two Hours with Cursor Changed My Mind About AI Coding
For the first time in my career, I have absolutely no idea what the software engineer job will look like in five or ten years.
I’ve always loved coding. All of it. I love making apps from scratch as m...
betweentheprompts.com
Was skeptical of AI coding after trying Copilot once.
Forced myself to use Cursor for 2 hours on real work. Completely changed my mind.
Good prompting is its own craft. Now I love these tools but have no clue what my job looks like in 5 years.
betweentheprompts.com/two-hours/
Forced myself to use Cursor for 2 hours on real work. Completely changed my mind.
Good prompting is its own craft. Now I love these tools but have no clue what my job looks like in 5 years.
betweentheprompts.com/two-hours/
Was skeptical of AI coding after trying Copilot once.
Forced myself to use Cursor for 2 hours on real work. Completely changed my mind.
Good prompting is its own craft. Now I love these tools but have no clue what my job looks like in 5 years.
betweentheprompts.com/two-hours/
Forced myself to use Cursor for 2 hours on real work. Completely changed my mind.
Good prompting is its own craft. Now I love these tools but have no clue what my job looks like in 5 years.
betweentheprompts.com/two-hours/
Two Hours with Cursor Changed My Mind About AI Coding
For the first time in my career, I have absolutely no idea what the software engineer job will look like in five or ten years.
I’ve always loved coding. All of it. I love making apps from scratch as m...
betweentheprompts.com
August 14, 2025 at 1:30 PM
Was skeptical of AI coding after trying Copilot once.
Forced myself to use Cursor for 2 hours on real work. Completely changed my mind.
Good prompting is its own craft. Now I love these tools but have no clue what my job looks like in 5 years.
betweentheprompts.com/two-hours/
Forced myself to use Cursor for 2 hours on real work. Completely changed my mind.
Good prompting is its own craft. Now I love these tools but have no clue what my job looks like in 5 years.
betweentheprompts.com/two-hours/
Already 300 downloads for Spliit.app iOS application 🤗
December 2, 2024 at 3:11 PM
Already 300 downloads for Spliit.app iOS application 🤗
I started Spliit.app, my open source alternative to Splitwise, a year ago.
This week, I released a first beta of the mobile app 🥳 apps.apple.com/us/app/splii...
This week, I released a first beta of the mobile app 🥳 apps.apple.com/us/app/splii...
Spliit - Shares Expenses
Spliit is a hassle-free, ad-free app to split expenses seamlessly with friends and family! Whether it’s for trips, dinners, or any shared cost, Spliit helps manage contributions with custom group fea...
apps.apple.com
November 16, 2024 at 3:40 PM
I started Spliit.app, my open source alternative to Splitwise, a year ago.
This week, I released a first beta of the mobile app 🥳 apps.apple.com/us/app/splii...
This week, I released a first beta of the mobile app 🥳 apps.apple.com/us/app/splii...
200 downloads already for my new book!
I listed all the advice I gave to developers about pull requests and code review over my years of experience and just put everything into a short guide (37 pages).
Download it for free and tell me what you think about it! scs.tl/book-pr
I listed all the advice I gave to developers about pull requests and code review over my years of experience and just put everything into a short guide (37 pages).
Download it for free and tell me what you think about it! scs.tl/book-pr
Pull Requests and Code Review: Strategies, Techniques, and Best Practices for Collaboration
Unlock the secrets to masterful pull requests and collaborative code reviews with practical insights from years of experience, all packed in one comprehensive guide!
scs.tl
October 18, 2023 at 7:30 PM
200 downloads already for my new book!
I listed all the advice I gave to developers about pull requests and code review over my years of experience and just put everything into a short guide (37 pages).
Download it for free and tell me what you think about it! scs.tl/book-pr
I listed all the advice I gave to developers about pull requests and code review over my years of experience and just put everything into a short guide (37 pages).
Download it for free and tell me what you think about it! scs.tl/book-pr
Would you like to become better at crafting pull requests and reviewing code?
Here are the 13 tips from my latest book that you can use in your daily developer activity: scastiel.dev/13-tips-for-...
Here are the 13 tips from my latest book that you can use in your daily developer activity: scastiel.dev/13-tips-for-...
13 tips for better Pull Requests and Code Review
Would you like to become better at crafting pull requests and reviewing code? Here are the 13 tips from my latest book that you can use in your daily developer activity.
scastiel.dev
October 17, 2023 at 6:31 PM
Would you like to become better at crafting pull requests and reviewing code?
Here are the 13 tips from my latest book that you can use in your daily developer activity: scastiel.dev/13-tips-for-...
Here are the 13 tips from my latest book that you can use in your daily developer activity: scastiel.dev/13-tips-for-...
There is something coming next week 🤫
July 14, 2023 at 3:11 PM
There is something coming next week 🤫
Server Components & Server Actions make the user and the developer experience better. A bit early to say they’ll change the way we build web apps on the long term, but I would take that bet!
📝 My new blog post about React and @nextjs.org! https://scastiel.dev/server-components-actions-react-nextjs
📝 My new blog post about React and @nextjs.org! https://scastiel.dev/server-components-actions-react-nextjs
Intro to React Server Components and Actions with Next.js
React is living something these days. Although it was created as a client UI library, it can now be used to generate almost everything from the server. And we get a lot from this change, especially wh...
scastiel.dev
July 3, 2023 at 3:04 PM
Server Components & Server Actions make the user and the developer experience better. A bit early to say they’ll change the way we build web apps on the long term, but I would take that bet!
📝 My new blog post about React and @nextjs.org! https://scastiel.dev/server-components-actions-react-nextjs
📝 My new blog post about React and @nextjs.org! https://scastiel.dev/server-components-actions-react-nextjs
My post about the new learning path I propose for React made it to the featured posts of the week on @dev.to 🎉
👉 https://dev.to/scastiel/a-better-learning-path-for-react-with-server-components-5ebn
👉 https://dev.to/scastiel/a-better-learning-path-for-react-with-server-components-5ebn
Congrats to our top authors of the week: Misha, Shai, Emanuele, alakkadshaw, Sebastien, Scott, and Dhruv! Thanks for sharing your insights with the DEV Community 🌟
https://dev.to/devteam/top-7-featured-dev-posts-from-the-past-week-5368
https://dev.to/devteam/top-7-featured-dev-posts-from-the-past-week-5368
Top 7 Featured DEV Posts from the Past Week
A round up of the most-read and most-loved contributions from the community this past week
dev.to
June 20, 2023 at 6:30 PM
My post about the new learning path I propose for React made it to the featured posts of the week on @dev.to 🎉
👉 https://dev.to/scastiel/a-better-learning-path-for-react-with-server-components-5ebn
👉 https://dev.to/scastiel/a-better-learning-path-for-react-with-server-components-5ebn
Reposted by Sebastien Castiel
I just wrote a short post with my thoughts about how React Server Components and @nextjs.org can help us teach/learn React a better way: https://scastiel.dev/better-learning-path-react
May 26, 2023 at 5:01 PM
I just wrote a short post with my thoughts about how React Server Components and @nextjs.org can help us teach/learn React a better way: https://scastiel.dev/better-learning-path-react
I just wrote a short post with my thoughts about how React Server Components and @nextjs.org can help us teach/learn React a better way: https://scastiel.dev/better-learning-path-react
May 26, 2023 at 5:01 PM
I just wrote a short post with my thoughts about how React Server Components and @nextjs.org can help us teach/learn React a better way: https://scastiel.dev/better-learning-path-react
Would you like to learn React and Next.js?
I’m designing a workshop to help developers who know HTML, CSS and JavaScript climb the next step and build their first full-stack application with the most popular framework today.
I’m designing a workshop to help developers who know HTML, CSS and JavaScript climb the next step and build their first full-stack application with the most popular framework today.
May 26, 2023 at 3:13 PM
Would you like to learn React and Next.js?
I’m designing a workshop to help developers who know HTML, CSS and JavaScript climb the next step and build their first full-stack application with the most popular framework today.
I’m designing a workshop to help developers who know HTML, CSS and JavaScript climb the next step and build their first full-stack application with the most popular framework today.
I’m drafting a workshop to help beginners learn React and @nextjs.org, and I couldn’t agree more with
the point @shadcn.com made on Twitter:
“An interesting side effect of RSC is that React is now actually easier to teach/learn.”
the point @shadcn.com made on Twitter:
“An interesting side effect of RSC is that React is now actually easier to teach/learn.”
May 24, 2023 at 3:52 PM
I’m drafting a workshop to help beginners learn React and @nextjs.org, and I couldn’t agree more with
the point @shadcn.com made on Twitter:
“An interesting side effect of RSC is that React is now actually easier to teach/learn.”
the point @shadcn.com made on Twitter:
“An interesting side effect of RSC is that React is now actually easier to teach/learn.”
Reposted by Sebastien Castiel
⭐️ 5 reasons to get a frontend dev mentor:
1️⃣ Personalized learning
2️⃣ Expert knowledge
3️⃣ Job search help
4️⃣ Continuous support
5️⃣ Accountability & motivation
Excited to offer long-term mentoring for devs: 1-on-1 sessions, job guidance & unlimited chat support! 💻 🚀
👉 scastiel.dev/mentoring
1️⃣ Personalized learning
2️⃣ Expert knowledge
3️⃣ Job search help
4️⃣ Continuous support
5️⃣ Accountability & motivation
Excited to offer long-term mentoring for devs: 1-on-1 sessions, job guidance & unlimited chat support! 💻 🚀
👉 scastiel.dev/mentoring
May 2, 2023 at 3:06 PM
⭐️ 5 reasons to get a frontend dev mentor:
1️⃣ Personalized learning
2️⃣ Expert knowledge
3️⃣ Job search help
4️⃣ Continuous support
5️⃣ Accountability & motivation
Excited to offer long-term mentoring for devs: 1-on-1 sessions, job guidance & unlimited chat support! 💻 🚀
👉 scastiel.dev/mentoring
1️⃣ Personalized learning
2️⃣ Expert knowledge
3️⃣ Job search help
4️⃣ Continuous support
5️⃣ Accountability & motivation
Excited to offer long-term mentoring for devs: 1-on-1 sessions, job guidance & unlimited chat support! 💻 🚀
👉 scastiel.dev/mentoring
⭐️ 5 reasons to get a frontend dev mentor:
1️⃣ Personalized learning
2️⃣ Expert knowledge
3️⃣ Job search help
4️⃣ Continuous support
5️⃣ Accountability & motivation
Excited to offer long-term mentoring for devs: 1-on-1 sessions, job guidance & unlimited chat support! 💻 🚀
👉 scastiel.dev/mentoring
1️⃣ Personalized learning
2️⃣ Expert knowledge
3️⃣ Job search help
4️⃣ Continuous support
5️⃣ Accountability & motivation
Excited to offer long-term mentoring for devs: 1-on-1 sessions, job guidance & unlimited chat support! 💻 🚀
👉 scastiel.dev/mentoring
May 2, 2023 at 3:06 PM
⭐️ 5 reasons to get a frontend dev mentor:
1️⃣ Personalized learning
2️⃣ Expert knowledge
3️⃣ Job search help
4️⃣ Continuous support
5️⃣ Accountability & motivation
Excited to offer long-term mentoring for devs: 1-on-1 sessions, job guidance & unlimited chat support! 💻 🚀
👉 scastiel.dev/mentoring
1️⃣ Personalized learning
2️⃣ Expert knowledge
3️⃣ Job search help
4️⃣ Continuous support
5️⃣ Accountability & motivation
Excited to offer long-term mentoring for devs: 1-on-1 sessions, job guidance & unlimited chat support! 💻 🚀
👉 scastiel.dev/mentoring
What would you like @vercel.com to announce for the rest of this Vercel Ship week?
I’ll start: an authentication solution, aggregating OAuth providers + username/password + password-less, compatible with Auth.js 🤞
I’ll start: an authentication solution, aggregating OAuth providers + username/password + password-less, compatible with Auth.js 🤞
May 1, 2023 at 4:47 PM
What would you like @vercel.com to announce for the rest of this Vercel Ship week?
I’ll start: an authentication solution, aggregating OAuth providers + username/password + password-less, compatible with Auth.js 🤞
I’ll start: an authentication solution, aggregating OAuth providers + username/password + password-less, compatible with Auth.js 🤞
Quick, I need an idea for a tiny side project to play with @vercel.com Storage! 🤩
Introducing Vercel Storage
◆ Vercel Postgres: Serverless and Edge-ready SQL
◆ Vercel KV: Durable, global, serverless Redis
◆ Vercel Blob: Fast, simple file storage
https://vercel.com/blog/vercel-storage
◆ Vercel Postgres: Serverless and Edge-ready SQL
◆ Vercel KV: Durable, global, serverless Redis
◆ Vercel Blob: Fast, simple file storage
https://vercel.com/blog/vercel-storage
May 1, 2023 at 4:05 PM
Quick, I need an idea for a tiny side project to play with @vercel.com Storage! 🤩
My latest blog post about React Server Components is featured in another newsletter: React Digest https://reactdigest.net
May 1, 2023 at 3:15 PM
My latest blog post about React Server Components is featured in another newsletter: React Digest https://reactdigest.net
Are you a developer looking to level up your skills and land your dream job? Whether you're new to the field or looking to expand your existing skills, I can help 👉 https://scastiel.dev/mentoring
April 27, 2023 at 4:18 PM
Are you a developer looking to level up your skills and land your dream job? Whether you're new to the field or looking to expand your existing skills, I can help 👉 https://scastiel.dev/mentoring
What if @bsky.app was nice not *in spite* but *because* of the invite model, and because invites are rare?
To be here, you have to really want it, and convince someone you are worth an invite… Could it be why people are so nice here?
To be here, you have to really want it, and convince someone you are worth an invite… Could it be why people are so nice here?
April 26, 2023 at 11:42 PM
What if @bsky.app was nice not *in spite* but *because* of the invite model, and because invites are rare?
To be here, you have to really want it, and convince someone you are worth an invite… Could it be why people are so nice here?
To be here, you have to really want it, and convince someone you are worth an invite… Could it be why people are so nice here?
Finally a good use case for an open API 😂
April 26, 2023 at 8:00 PM
Finally a good use case for an open API 😂
My blog post about React Server Components is in the latest issue of This Week in React newsletter 😍 https://thisweekinreact.com/newsletter/143
April 26, 2023 at 3:11 PM
My blog post about React Server Components is in the latest issue of This Week in React newsletter 😍 https://thisweekinreact.com/newsletter/143
Do you use TypeScript?
If you’ve never tried Zod to supercharge your code, you’re missing something! And you can use it for more than validating user input 😉
If you’ve never tried Zod to supercharge your code, you’re missing something! And you can use it for more than validating user input 😉
Using Zod & TypeScript for more than user input validation
If you have ever created an API or a form accepting user input, you know what data validation is, and how tedious it can be. Fortunately, libraries can help us, such as Yup or Zod. But recently, I realized that these libraries allow patterns that go much farther than input validation. In this post, I’ll show you why I now use them in most of my TypeScript projects.
scastiel.dev
April 26, 2023 at 12:19 PM
Do you use TypeScript?
If you’ve never tried Zod to supercharge your code, you’re missing something! And you can use it for more than validating user input 😉
If you’ve never tried Zod to supercharge your code, you’re missing something! And you can use it for more than validating user input 😉
Giving Arc browser a new chance (wasn’t convinced at first try). I think my favorite feature so far is this window when you click a link in a pinned tab!
April 25, 2023 at 9:00 PM
Giving Arc browser a new chance (wasn’t convinced at first try). I think my favorite feature so far is this window when you click a link in a pinned tab!
Anyone from Montreal 🇨🇦 around here?
April 25, 2023 at 3:13 PM
Anyone from Montreal 🇨🇦 around here?
Three years ago I made this small app to make slides on top of Excalidraw. Thanks to a tweet it’s getting quite some attention today 😁 https://excalidraw-slides.netlify.app/
excalidraw-slides.netlify.app
April 25, 2023 at 2:53 PM
Three years ago I made this small app to make slides on top of Excalidraw. Thanks to a tweet it’s getting quite some attention today 😁 https://excalidraw-slides.netlify.app/