This book constitutes the refereed proceedings of the 11th IFIP WG 13.2 International Working Conference on Human-Centered Software Engineering, HCSE 2026, held in Paderborn, Germany, during September 29–30, 2026.

The 11 full papers and 4 other papers (two demos and two posters) presented in this volume were carefully reviewed and selected from 29 submissions.

They are organised into the following topics: Human-Centred Design Processes for Inclusive and Complex Interactive Systems; Human-Centred Security, Trust and Operational Decision-Making;  Mental Models, Explainable AI and Human-AI Symbiosis; Posters and Demos