A comprehensive presentation of the design process leading to a NodeJS framework which acts as a spatial data and application interface. The XYZ framework also provides a control library and responsive views tying everything together. Library methods make use of function composition in javascript to augment methods for a range of client applications. A monorepo is used to handle deployments on a server, as a cloud function or as an API gateway for microservices. A security strategy made possible through the use of JWT + JOSE in NodeJS’ middleware will be outlined to fit different deployment modes and client application requirements. https://github.com/geolytix/xyz http://bit.ly/composing_xyz http://bit.ly/fastify_authentication