I am afraid there is no right or easy answer to this question. Quarkus has an easy caching option https://quarkus.io/guides/cache, but it does not scale. There are a million solutions out there for caching. Depending on your needs there will be a ready to use framework. Some examples would be hibernate caching, infinispan, elastic search (index) and so many more. There is also a solution provided in conx-framework using browser cookies to cache roles and permissions. This might work only for frontend roles. Maybe in your case i simple application scoped cache with short lifetime might be a way to go.

cheers luke