Think Before
You Build.

How Google finishes your sentence — trie data structures, top-K prefix queries, distributed aggregation of search trends, and serving suggestions in under 50ms.

Matching riders to drivers in real-time — geospatial indexing, dynamic pricing, the dispatch algorithm, and how to handle the thundering herd when it starts raining.

How Google indexes the internet — distributed BFS across billions of pages, politeness constraints, content deduplication, and the surprisingly hard problem of deciding what to crawl next.

Building a Redis or DynamoDB from scratch — consistent hashing, replication, the CAP theorem, quorum reads and writes, and conflict resolution with vector clocks.

How Netflix and YouTube store, encode, and deliver video to 200M concurrent viewers — adaptive bitrate streaming, CDN architecture, and the encoding pipeline.

How social platforms generate personalized feeds for hundreds of millions of users — fan-out strategies, ranking signals, and the push vs pull debate.

Behind the scenes of real-time messaging — WebSockets, message storage, delivery guarantees, presence indicators, and how WhatsApp serves 100B messages per day.

How to protect your APIs from abuse and ensure fair usage — covering token buckets, sliding windows, distributed counters, and where to enforce limits.

A deep dive into building a production-grade URL shortening service — from hashing strategies and DB schema to caching layers and horizontal scaling.