System DesignHow We'd Design a URL ShortenerHow does bit.ly turn a long URL into 7 characters without collisions? We break down the hashing, Base62 encoding, Python code, and scaling trade-offs.BrainyTech Team • 8/14/2026Read More
System DesignThe LRU Cache — and How It Powers API Response CachingYour API can't cache everything forever. See how HashMap + Doubly Linked List gives O(1) get/put — and how this exact pattern powers real API caching.BrainyTech Team • 8/14/2026Read More
