This work addresses the problem of automated graphical user interface generation for functional programs in relation to rapid application prototyping. First an analysis of current state in the field of automated GUI generation is performed. Based on the analysis, the concept of functionally structured user interface (FSUI) is introduced. Meta-data system for code annotation is then specified for the Clojure programming language and a transformation from this system to FSUI data model is implemented. Finally, a graphical layer for displaying the actual interface is implemented in Clojure.