Multifaceted implementation of PSD2-compliant "aggregator" API for PSD2-compliant Nordic banking institutions with software architecture enabling quick onboarding of new banks towards the System. One more state of affairs can be an application that combines an API gateway with microservices. This method is likely to be ample for a few eventualities https://jaidenvrldv.suomiblog.com/a-review-of-backend-web-development-52087535