Simple Merchant

API Gateway in conjunction with Lambda has allowed us to become 'serverless'. We have a number of API endpoints that range from simple CRUD operations, through to triggering chains of complex background jobs. Like Lambda, this service has released us from getting bogged down in infrastructure management, freeing up huge amounts of time to focus on solving business problems. Amazon API Gateway

SQS is the bridge between our new Lambda services and our incumbent Rails applications. Extremely easy to use when you're already using other AWS infrastructure. Amazon SQS

Our primary transport mechanism for events. One SNS topic carries a specific event type and n-number of subscribers (usually a Lambda) may subscribe to that event. Amazon SNS

We're moving almost the entirety of our backend processes into Lambda. This has given us vast cost savings in terms of pure infrastructure billing - and time worrying about platform and scale. This move has also made our architecture almost entirely event-driven - another huge benefit as our business itself is inherently event-driven. AWS Lambda