Works for Croteam
Worked for the Croatian developer Croteam from 2015 to 2020, 5 years! They are best known for about their classic first person shooter series, Serious Sam, and more recently, the philosophical puzzle game series, The Talos Principle.
Thanks to my success in modding the Serious Sam games, Croteam contacted me about Beta Testing work for the then in development Serious Sam 3 in 2011, then The Talos Principle later. Having to know some of the team through this, I was hired to work on Serious Sam 4's ill-fated PVP mode's and Survival mode's levels; but got involved in more!
At my time at Croteam, they exclusively used their long-lived custom engine, the Serious Engine.