AI and diplomacy
Arriving as backup, I spent the end of 2016 and the beginning of 2017 helping the Endless Space 2 team implement and tune the game's AI opponents,
having previously been (very) loosely involved in designing the new "ENFER" AI model that was being used.
I would notably come up with the system that the AI uses to choose ship equipment based on their most hated opponent.
The Diplomatic Requests system that I designed during this period would be released as part of the Galactic Statecraft update.