Everyone is welcome to contribute code to element-desktop, provided that they are willing to license their contributions to Element under a Contributor License Agreement (CLA). This ensures that their contribution will be made available under an approved licence(as described in the README).
element-desktop follows the same pattern as element-web, please find more contributing guidelines at https://github.com/vector-im/element-web/blob/develop/CONTRIBUTING.md