Rovio is seeking a Lead Level Designer for its Angry Birds Friends (ABF) team. The role involves innovating within the puzzle category and elevating the core game experience by creating engaging levels. Responsibilities include analyzing game strengths and weaknesses, leading initiatives to enhance success, understanding core game logic, level mechanics, player feedback, and the player journey. The position requires contributing as a key member of the level design team, curating levels, collaborating with stakeholders, advising on A/B tests, and mentoring fellow designers.