Glossary of definitions

On-call Engineer (OCE)

The on-call engineer is the person currently assigned to take-point if any serious issues arise. They are typically the ones on “pager duty” who get a phone call in the middle of the night if/when things break.


An incident management platform that provides reliable incident notifications via email, push, SMS, and phone, as well as automatic escalations, on-call scheduling, and other functionality to help teams detect and fix infrastructure problems quickly.

Parameter Store

The Amazon Systems Manager Parameter Store provides secure, hierarchical storage for configuration data management and secrets management.

Platform-as-a-Service (PaaS)

A Platform-as-a-Service is a type of cloud platform which offers black-box services that enable developers to build applications on top of the compute infrastructure without needing to deal with the day-to-day maintenance of the infrastructure. This might include developer tools that are offered as a service to build services, or data access and database services, or billing services.

Relational Database Service (RDS)

Amazon Relational Database Service is a service that makes it easier to set up, operate, and scale a relational database in the cloud. It provides cost-efficient, resizable capacity for an industry-standard relational database and manages common database administration tasks such as backups, restores, and automatic failover.