John Sot contributed to the TykTechnologies/tyk repository by implementing SessionState KeyId support to enhance API access token tracking and auditing. He introduced an additive KeyId field to the SessionState protobuf, carefully updating Go structs, protobuf definitions, and helper utilities to ensure compatibility and minimize disruption. By exposing KeyId to gRPC plugins, John enabled improved traceability and compliance readiness for API access tokens. His work focused on backend development using Go, protobuf, and gRPC, addressing the need for better token auditing within the platform. The feature was delivered as a cohesive update, reflecting a focused and technically sound engineering approach.