Key skills: 5GC SBA, service mesh, cloud-native NFs

Service-Based Architecture Expertise

The 5G core uses a service-based architecture where NFs communicate via HTTP/2 RESTful APIs defined in 3GPP TS 29.5xx series. Engineers must understand NF service registration with NRF, service discovery, and authorization using OAuth2 tokens. Key SBI interactions include Namf (registration), Nsmf (session management), Nudm (subscriber data), Npcf (policy), and Nnssf (slice selection). Proficiency in reading OpenAPI/Swagger specifications and tracing SBI call flows through service mesh proxies is essential for troubleshooting.