api-design-interviewer

API design for multi-service architectures involves structuring scalable contracts and gateway patterns across REST, GraphQL, and gRPC. This includes defining proper HTTP methods, status codes, idempotency, and deprecation strategies to ensure secure interactions.

Choosing between REST, GraphQL, and gRPC involves evaluating trade-offs in API patterns, security controls like OAuth2 and JWT, and deployment strategies. REST offers standardization, GraphQL provides flexible querying, and gRPC optimizes high-performance communication.

API gateway security and routing policy enforcement is achieved by implementing authentication, CORS, and traffic routing rules. This controls access across services and ensures proper policy enforcement for multi-service architectures.

API versioning and deprecation strategies require structured lifecycle management to phase out outdated endpoints without breaking clients. This involves applying proper HTTP status codes and clear versioning paths across REST, GraphQL, and gRPC interactions.

API design for distributed services covers pagination and idempotency by defining consistent contract behaviors. Idempotency ensures safe retry of operations, while pagination manages large dataset responses across multi-service architectures.