Designing GraphQL API's for scale is quite a challenge as GraphQL is relatively a new technology. Bogdan Nedelcu talked about system architecture patterns that have been around for a long time in different flavors that GraphQL bases on.
During his talk, Roman Paradeev made an overview of tools that provide type safety across your database, API & client-side in the GraphQL ecosystem.
"Key learnings from implementing authentication and authorization using GraphQL" by Christoph Hartmann
Basing on his experience with GraphQL implementation Christoph Hartmann presented different approaches to implementing authentication and authorization for GraphQL services.