Term Kind Topic What it is
Amazon Prime Video: Serverless Back to a Monolith Prime Video Audio/Video Monitoring case-study Monolith vs Microservices A distributed serverless pipeline was consolidated into a single process, reducing cost by over 90% — for one component, for specific reasons that do not generalise.
Spotify: Trading Kafka Operations for a Managed Service Spotify Event Delivery case-study Managed vs Self-Managed Spotify moved its event delivery backbone from self-managed Kafka to a managed pub/sub service, choosing to buy back operational capacity rather than deepen expertise.
Uber: Choosing a Database for Write Amplification Uber Postgres to MySQL case-study Technology Selection Uber publicly documented moving from Postgres to MySQL for their workload, and the reasoning is a useful lesson in evaluating a datastore against your actual access pattern.