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.