The ContentTranslation project has machine translation api that is widely used in the Translation tool, but it is less known fact that it is a public api to use for other use cases of Wikimedia. If you have any idea/projects to use machine translation, this would be a session to learn and discuss that.
Secondly, The ContentTranslation publishes its parallel corpora in TMX format for the use of new machine translation engine developers. https://www.mediawiki.org/wiki/Content_translation/Published_translations
So, if you are interested, in any of these and discuss/hack with CX developers, welcome