Challenges

Tune an NGINX reverse proxy to hit p95 latency targets under steady simulated traffic.

Add a cache-aside layer in front of a slow service and lift the cache hit rate above target.

Design partitioning and consumer groups so the pipeline keeps up with a bursty producer.

Implement a token-bucket limiter that stays correct across multiple service replicas.

Scale a hot write path by sharding a counter and reconciling totals under contention.

Configure cache-control and revalidation so the origin offload meets the target ratio.