Gui Ferreira

🚀 Enrollment is open!

Build a Full-Stack AI App with .NET. A 7-week cohort designed to take you from curious to confident.

Each week includes a focused video lesson + office hours for direct feedback.
By the end, you'll know exactly how to add real AI features to your product.

Are you ready?

Enroll Now: aipowereddotnet.school/

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1 week ago | [YT] | 13

Gui Ferreira

🧪 Testing isn't optional anymore—it's a core skill for every C# developer.

That's why I created a new course on xUnit.net—the most widely used testing framework in .NET.

👉 Whether you're writing your very first test or exploring what's new in xUnit v3, this course takes you from zero → professional-grade practices.

🔗 Join me and master the testing framework .NET runs on.

2 months ago | [YT] | 1

Gui Ferreira

3 years ago, I posted my first YouTube video.
Since then? 156 long-form videos. Tried all the things — frameworks, design patterns, you name it.

Here's what actually worked: simplifying stuff.

Turns out devs don't need more layers of abstraction. They need less junk, fewer moving parts, and simpler code.

So, year 4? I'm going all-in on minimalism.
Not in a "wear black t-shirts and own 2 forks" kind of way.
In a "build things that make sense and don't break your brain" kind of way.

What's the most over-engineered thing you've simplified lately?

4 months ago | [YT] | 8

Gui Ferreira

Another year as Microsoft MVP! 🏆

Proof that you don't need overcomplicated code to make an impact in the .NET world.

Thanks for being part of this journey - more simple ideas coming soon!

4 months ago | [YT] | 59

Gui Ferreira

Do you know if there is any data on the age distribution of .NET developers (like the one in the image)?

I'm trying to confirm a theory 😉

7 months ago | [YT] | 12

Gui Ferreira

Ok... I've found an AI prompting hack that's making it 10x more effective.

I was using AI entirely backwards. I'll share the exact prompt in tomorrow's newsletter.

Sign up now (link below) so you don't miss it.
This one's too good to keep to myself.

guiferreira.me/newsletter/

8 months ago | [YT] | 10

Gui Ferreira

🚨 MediatR and AutoMapper are going commercial!

At this point, the question is: who's next?

More about it here:
www.jimmybogard.com/automapper-and-mediatr-going-c…

8 months ago | [YT] | 32

Gui Ferreira

5 minutes and 15 seconds a year is how long your cloud applications can be down, even if you go the extra mile.

Even the hard-to-get famous five nines (99.999%) feel perfect until we know what they mean.

There's no perfection.
There's a ton of tradeoffs.

11 months ago | [YT] | 15

Gui Ferreira

I always have a yearly goal for what I want to learn.
A skill, a language, a framework, etc.

What do you plan to learn next year?
What's on your list for 2025?

11 months ago | [YT] | 10

Gui Ferreira

Do you know you can attend NDC Porto in October for free?
How?

I’m giving away a ticket! 🎟️

Win a 3-Day Conference Pass to NDC Porto 2024 here:

guiferreira.ck.page/ded62a461b

1 year ago | [YT] | 9