The Senior C# Unity Developer will translate design requirements into acceptance criteria, take ownership of essential game features, and reproduce issues for QA. They will promote best engineering practices, estimate task efforts, provide support for live game operations, and mentor other engineers. The developer will also participate in code reviews, identify coding standard deviations and risks, and communicate effectively with teammates. The role requires experience in full lifecycle game development, proficiency in C# and Unity, expertise in implementing technical aspects of design documents, and the ability to architect solutions.