I've been a Level Designer at Climax Studios about a year in total, working on the major AAA-project Exodus both as a full time employee on-site and later on through a remote freelancing contract. As a part of the design team my responsibilities included but was not limited to:

- Designing gameplay areas
- Puzzle design
- Encounter design
- Documentation
- Puzzle prototyping
- Designing gameplay/puzzle mechanics

To read more about Climax Studios and their current projects, that can be found here.