The API is principally a Laravel 9 application which exposes a number of RESTful API endpoints for first and third party applications to interact with.
https://www.figma.com/file/vNVsSIBfktduOGwwEX0lBb/Untitled?node-id=1%3A3&t=dZ9lQMRv2aIk48wv-1
The Admin app is a Vue.js SPA (Single Page App) using Vue Router for the routing and the GOV.UK Design System via the GOV.UK Frontend package. It is a static site that is intended to be hosted on an AWS S3 bucket or equivalent. All logic is handled by the API - so you can think of this app as purely an interface for the API.
https://www.figma.com/file/vNVsSIBfktduOGwwEX0lBb/Tech-Stack---Diagrams?node-id=1%3A172&t=QN2rUrIKNY7maQ9I-1
Author: @Mike
Status: Complete