Akshita Srivastava

How to cache a slow third-party API in Redis with a stampede lock, serve stale data safely, and compute 'is active' at read time so old data never lies.

Short-lived access JWTs, rotating refresh tokens in token families, theft detection, a multi-tab grace window, and a Redis blacklist that keeps JWTs useful.

How to upload images straight to Cloudflare R2 from the browser, keep a ticket in Redis, verify files by their real bytes, and think through every failure order.