The Blog

Design a scalable notification service: fan-out, delivery guarantees, rate limiting, and multi-channel routing for interviews.

Design a payment processing system for interviews: idempotency, double-entry ledgers, and failure recovery.

Design a ride-sharing platform like Uber: geospatial matching, dispatch, pricing, and data model, with a full system design interview walkthrough.

System design breakdown of search engine architecture: crawling, inverted indexes, ranking, and sharding, with 2026 interview-ready tradeoffs.

System design deep dive on building a scalable social media feed: fan-out strategies, ranking, and caching for 2026 interviews.

A complete, benchmarked 2026 system design solution for the URL shortener interview question, with tradeoffs explained.