gRPC Microservice Mesh Stack (Go, gRPC, Kubernetes, PostgreSQL, Prometheus) overview

A polyglot microservice architecture using gRPC and Protocol Buffers for strongly-typed, high-performance inter-service communication. Go is the primary service language for its low overhead and fast compile times. Kubernetes orchestrates service deployment, scaling, and service discovery. PostgreSQL provides per-service databases following the database-per-service pattern. Prometheus and Grafana deliver service-level metrics (request rates, error rates, latencies) across the mesh. Protobuf schemas serve as the single source of truth for API contracts, enabling automated client code generation in any language. The tradeoff is significant upfront complexity — teams must manage Protobuf schema versioning, gRPC interceptor chains, distributed tracing, and Kubernetes networking before shipping their first feature.