How to Build Your Confidence As a Ruby Developer So You Can Write Awesome Ruby Apps

If you learned the basics of Ruby but you still feel like you could be doing a lot better...

...if you don't feel confident in your Ruby skills...

...if you'd like to earn more, write better code & be proud of your work...

...then this could be the most important message you'll read today.


my name is Jesus Castello, I've been a Ruby developer for over 6 years & I want to help you become a better Ruby developer.

Would you agree that if your Ruby skills are lacking you're gonna have a hard time...

...understanding how things work...

...fixing things when they go wrong

...& solving real-world problems?

If you're only learning Ruby to pass time & have fun... then this isn't for you

But if you want to build a solid career, get paid & feel good about your work you need to take this seriously.

Here's how:

  • 1
    Find out a list of all the topics you need to cover (like metaprogramming & lambdas).
  • 2
    Gather all the information from many different sources, filter through it to remove outdated & low-quality material.
  • 3
    Study that information, hoping that you didn't miss anything important.

Sounds like a lot of work right?

Because it is!

This Is Your Problem

There are far too many average developers...

But who wants an average anything?

Don't fall into this whole "average is fine" mentality.

If you want the best for YOURSELF & those you care about you have to BECOME exceptional.

When you become exceptional you'll be able to write better code, enjoy your work more & feel more confident.

Anyone can do this.

But there is a problem:

It's hard to know exactly what you need to learn...

...and it's even harder to find all the information you need in one place!

That's why I invested over 100 hours of my time to put together a resource for you.

"What will this do for me?"

  • You'll build a solid foundation of Ruby skills to help you become more confident so you can build better Ruby applications!
  • You'll bridge the gap between the fundamentals & more advanced concepts so you can shortcut your learning curve
  • You'll discover the tools, ideas, and examples you need to understand Ruby (and Rails) better & faster!

This is Ruby Deep Dive, the book for serious Ruby developers.

Mary Katherine


I've been reading Ruby Deep Dive as I have time and finding it to be SUPER helpful.

It's exactly the 'next step' I needed after doing all the beginner tutorials. Thanks for writing it!!! :)

Inside Ruby Deep Dive You'll Discover:

  • What are blocks, procs & lambdas, how they work & how to use them for maximum benefit!
  • Ruby tricks, tips & advice to help you become a better developer.
  • How to make your Ruby programs faster
  • Why Enumerable is the most important Ruby class & how to get the most out of it!
  • One thing you need to stop doing now unless you want to look like a beginner developer
  • A review of the core Ruby classes so you aren't missing out on something important!
  • Exactly why this hidden Ruby class makes it possible for Ruby to have class methods (this is the key to understanding how Ruby works under the hood)
  • ...and many other fascinating topics that you will not find on your average Ruby book

Imagine being able to understand every line of code in your project...

...and learning to use the full power of Ruby so you can become more confident, understand how things work & write better code.

...and because Rails is built on top of Ruby, you'll also understand Rails better!

Ruby Deep Dive will help you do that.

This Is What You Get:

  • An easy to read 200+ page PDF eBook
  • 100+ Code Examples You Can Copy & Paste For Quick Learning!
  • 8 Printable Mindmaps That Give You A Powerful Overview Of Every Important Ruby Class & Method
  • A List of Curated Resources that Help You Keep Growing As a Developer!
  • Answers to All Your Ruby Questions (related to the book contents) Via My Personal Email

According to popular job-search site, Ruby developers hold some of the highest-paid positions in web development.

If you had to pay an expert Ruby developer to put together this program for you it would cost you THOUSANDS of dollars!

But I'm not going to charge you that much because I want everyone that is serious about this to have access to this powerful material...'s not going to cost you $500,

... or even $300.

Way less than that.

You can get this complete Ruby training package today for a SMALL investment of $49!

Click the yellow button below & grab your copy today :)

Ruby Deep Dive

(When you complete your purchase you'll instantly receive a download link to a zip file containing the PDF of the book plus all the learning resources.)


I know you'll love this book because I put a lot of work into it, but if for whatever reason you aren't happy with it... problem!

Let me know within 60 days & I'll give your money back.

Who Is This Book For?

This is for you if...

  • You have learned the basics of Ruby (variables, if statements, loops, methods)
  • You want to become a great Ruby developer
  • You enjoy learning new things

Not for you if...

  • You're looking for very advanced content
  • You don't think learning & improving your skills is important
  • You're a complete beginner

Table of Contents

How to Use Pry To Improve Your Ruby Skills

Exceptions! What error messages mean & how to handle them

Data Structures, Serialization & Ranges

The Ruby Object Model

Ruby Blocks, Procs & Lambdas

How to Use Regular Expressions in Ruby

Understanding Modules & Their Uses

How to Build A Simple API Using Sinatra

The Enumerable Module: inject, map, select & more!

How To Compare Objects in Ruby

How to Make Your Ruby Code Faster

Metaprogramming by Example


Jay Wilburn

Full-Stack Developer

This book has helped me understand things better. And I have been able to apply those learnings into some of my work.

Today is the day when you finally make a good decision & get back on track to becoming an awesome Ruby developer.

Don't wait any longer & start improving your Ruby skills today!