Low Level System Design: Design Patterns and SOLID Principles

Writing code that works is only the first step; writing code that lasts and scales requires a deep understanding of structural integrity. This course provides the foundational knowledge needed to transition from writing simple scripts to architecting professional-grade software systems through the lens of object-oriented design. You will learn how to identify common architectural challenges and solve them using industry-standard design patterns. By the end of this course, you will be able to apply SOLID principles to ensure your code is flexible, testable, and easy for other developers to understand, regardless of the programming language you use. What you'll learn: - Understand the core concepts of Object-Oriented Programming and how they form the basis of low-level design. - Apply SOLID principles to create decoupled and highly maintainable software architectures. - Implement creational, structural, and behavioral design patterns to solve recurring development challenges. - Practice composition over inheritance to build more flexible and extensible codebases. - Analyze technical requirements to choose the most efficient design pattern for a specific problem. - Learn modern techniques for dependency injection and design for testability. The course begins with essential terminology and the philosophical shift from basic coding to object-oriented thinking. You will then progress through detailed written explanations of each major design pattern and principle, supported by clear code examples and logic-based exercises designed to sharpen your architectural intuition. This course is designed for beginner developers and students who have a basic understanding of programming and want to improve their software architecture skills. No prior experience with system design is required. Start building more robust and professional software today through structured design principles.