The core separation between a High-Level Blueprint (HLD) and a Detailed Design (LLD) lies in their breadth . An HLD provides a general overview of the system , outlining the primary components and their interactions – it's essentially the "what" and "why." Conversely, an LLD delves into the preci… Read More

Caching Strategies Start With One Question: How Stale Can This Data Be? Most caching answers jump straight to Redis. The stronger answer starts one step earlier. Caching is a deliberate trade of freshness for speed, so the first thing to establish is how much staleness t… Read More