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SOLID Principles Course

SOLID Principles Course
from 4 to 360h flexible workload
certificate valid in your country

What will I learn?

This SOLID Principles Course teaches you how to design clean, extensible subscription and payment systems using real-world patterns. You will learn domain modelling for users, subscriptions, and invoices, robust payment flows, and flexible notification channels. Practice abstractions, dependency injection, testing strategies, and safe extension techniques to add new payment methods and channels without breaking existing code.

Elevify advantages

Develop skills

  • Model subscription lifecycles: design clear states for billing and access control.
  • Architect payment flows: build SOLID, testable adapters for cards, PayPal, and more.
  • Design pluggable notifications: add email, SMS, and push without core rewrites.
  • Apply SOLID in practice: cut coupling, boost cohesion in real backend modules.
  • Extend safely: add payment methods and channels using OCP and DIP patterns.

Suggested summary

Before starting, you can change the chapters and workload. Choose which chapter to start with. Add or remove chapters. Increase or decrease the course workload.
Workload: between 4 and 360 hours

What our students say

Your classes are perfect. I got the one-year package and finally have the chance to follow several topics I'm interested in without having to switch platforms... thank you for everything you do, I've already recommended you to others...
Giulio Carlo
Giulio CarloDigital Marketing Student
I like how the lessons get straight to the point and how I can switch chapters and skip content I don't need.
Mariana Ferres
Mariana FerresPhotography Student
I like the content and the way the videos are presented and transcribed, which speeds up the process!
Luciana Alvarenga
Luciana AlvarengaNail Design Student
The platform is fast and easy to use. The variety of content and the extra videos really help with learning.
Giulio Carlo
Giulio CarloPrompt Engineering Student

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