In May 2025, Alex contributed to the JetBrains/ideavim repository by enhancing Vim key handling and mapleader support, focusing on expanding the usability of Vim-style mappings within the editor. Alex implemented support for non-control-character mapleader keys, such as <C-Space>, and refined the key parsing logic to improve the accuracy of special key recognition. The work involved updating the VimStringParserBase to better handle Vim script strings and increasing unit test coverage to ensure reliability and reduce regressions. Using Kotlin and leveraging skills in Vim plugin development and backend engineering, Alex delivered targeted improvements with a clear focus on editor ergonomics.