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Improved API response times by integrating Redis/Memcached caching across a Django microservices architecture.
As traffic grew, several high-traffic API endpoints were making repeated, expensive database queries — slowing response times and putting unnecessary load on PostgreSQL.
Audited the slowest endpoints, identified queries that were safe to cache, and implemented a caching layer using Redis and Memcached alongside Django's cache framework. Also optimized several PostgreSQL queries directly (added indexes, rewrote inefficient joins, used stored procedures where it made sense) so caching wasn't papering over a deeper problem.