All Articles

Notes on backend systems, databases, and engineering.

• testte

  edwede

  Jul 10, 2026 · 1 min read · fwef

• Meta Rejected Me After the Onsite. It Was the Ranking Question, Not the Coding Round.

  I designed News Feed ranking well. I designed it for a world with no bad actors.

  Jul 10, 2026 · 1 min read · backend,database,devops

• Redis Persistence: RDB vs AOF

  How Redis survives restarts — a practical look at RDB snapshots and AOF append-only logs.

  Jun 15, 2026 · 1 min read · Databases

• Designing a Rate Limiter with Redis

  Token bucket vs sliding window — implementing rate limits that actually work in production.

  Jun 1, 2026 · 1 min read · Backend