I worked at Frogsong for almost 8 years doing all types of programming work, as we where a small studio I got to work on everything from AI to the UI.
But if I where to choose what i have found most fun during my time that would have to be working on gameplay systems like creating spells and the enemy AI in spellsworn or creating new types of turrets and new level mechanics in D-Corp.
While working at frogsong I have also participated in a lot of smaller collaborations with other gaming companies. An example would be working on Stick Fight, getting to do optimization work and fixing issues with the level editor.
https://store.steampowered.com/app/1285040/DCorp/
D-Corp was the second studio title I got to work on at Frogsong, it is a cooperative tower defence / resource management game.
I got to work on most of the larger systems and the two I would say was my favourite and i would be the turrent systems and creating the different turret types. And also the different level mechanics / gimmicks.
https://store.steampowered.com/app/360620/Spellsworn/
Spellsworn was the first project I got to work on when i was hired at Frogsong.
Spellsworn is an online pvp game where magicians fight in different arenas that slowly shrink until there is only one player left standing.
When I got hired i started mostly working with fixing bugs while getting into the project. And over time my main focus was mostly changed into working on implementing new spells and abillities, while also maintaining our enemy AI to make sure they could utilize all new abilities propperly.