• Developer screen
• Feature flagging
  • Allow switching backend on-the-fly without rebuilding
• Smoke testing backend on the first connection
• Pinging to BE once in a minute or so, keep-alive check
• gettext-style of i18n
• RPC with schema and introspection + protocol negotiation
• Thin application layer on top of a database. No ORM.
  • Expose DB to the client with proper rate-limiting, row-level security, concurrency handling
• Include git version at runtime by having an autogenerated file that is imported by the main code. The file is added to .gitignore.
  • git describe --tags
  • export const VERSION_STRING = GIT_VERSION_STRING || 'ERR_VERSION_UNKNOWN'
• Send app identification string to server together with every request
  • App name
  • Version, build code
  • Platform