Designed and built a production-style distributed backend platform in Go with multiple independently deployable services, REST and/or gRPC APIs, service-to-service communication, authentication-aware request flows, containerized deployment, observability, and CI/CD-oriented project structure. The system emphasizes clean service boundaries, reliable API contracts, concurrency-safe backend logic, structured logging, health checks, and scalable architecture patterns similar to those used in cloud-native production environments.