The two-volume set LNCS 16320 and16321 constitutes the refereed proceedings of the 23rd International Conference on Service-Oriented Computing, ICSOC 2025, held in Shenzhen, China, during December 1-4, 2025.

The 42 full papers and 21 short papers presented in these proceedings were carefully reviewed and selected from 219 submissions. The papers are organized in the following topical sections:

Part I: Service Foundations; Service Recommendation and Selection; Microservice Architectures; Serverless Computing; and Services at the Edge.

Part II: Software as a Services and Cloud Infrastructure; Privacy, Security and Trust; Services and Business Processes; Quantum Service Computing; and Industrial Papers.