Mastering Object-Oriented Programming Course
This course guides you through building a FreelanceManager application using object-oriented programming principles, covering class design, inheritance, polymorphism, SOLID principles, testing, and refactoring to create maintainable code.

4 to 360 hours of flexible workload
certificate valid in your country
What Will I Learn?
Mastering Object-Oriented Programming Course teaches you to design clean, extensible systems through a realistic FreelanceManager app. You will model clients, projects, billing, invoices, and time tracking using classes, inheritance, interfaces, and polymorphism, then apply SOLID, testing strategies, error handling, and refactoring patterns to deliver maintainable, well-documented, production-ready code.
Elevify Advantages
Develop Skills
- Design robust OOP models: craft clean classes, interfaces, and project hierarchies.
- Implement polymorphic billing: build invoices, taxes, and discounts that scale fast.
- Apply SOLID and testing: refactor OOP code with unit tests for reliable releases.
- Model real clients and projects: enforce validation, IDs, and lifecycle workflows.
- Build a CLI FreelanceManager: in-memory data, CRUD, and reports in one short project.
Suggested Summary
Before starting, you can change the chapters and the workload. Choose which chapter to start with. Add or remove chapters. Increase or decrease the course workload.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 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 FerresPhotography Student
I like the content and the way the videos are presented and transcribed, which speeds up the process!

Luciana AlvarengaNail Design Student
The platform is fast and easy to use. The variety of content and the supplementary videos really help with learning.

Giulio CarloPrompt Engineering Student
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