Calendar System Architecture and Coding Interview Patterns

System design and algorithmic questions involving scheduling, time-slots, and calendar operations are incredibly common in technical interviews. To ace these questions, you need to understand both the underlying data structures and the modern architectural patterns that power real-world scheduling applications. This course bridges the gap between everyday calendar features and the computer science concepts required to build them. You will start with core definitions, learning how time zones, recurring events, and concurrency are represented in code before moving on to practical algorithmic challenges. What you'll learn: Understand core calendar data structures and how to represent intervals of time; Solve interval-based coding challenges like overlap detection and free-busy lookups; Apply modern concurrency patterns to handle double-booking and race conditions; Practice algorithmic approaches such as the sweep-line algorithm and greedy scheduling; Design scalable backend architectures for high-volume invitation and notification flows. This text-based course guides you step-by-step from foundational time-complexity concepts to writing optimized solutions for complex scheduling problems. This course is designed for beginner to intermediate software engineers preparing for coding interviews or looking to build robust scheduling systems, with no advanced system design prerequisites required. Start reading today to master interval algorithms and elevate your technical interview performance.