This Senior Software Engineer role at Google focuses on recommendations and ads. Responsibilities include writing and testing code, collaborating on design and code reviews, contributing to documentation, triaging and resolving product issues, and building and deploying recommendation system models (retrieval, prediction, ranking, personalization, search quality, embedding) in production. The ideal candidate will have 5+ years of software development experience, including experience with data structures and algorithms, and a strong background in machine learning and deep learning principles. The role requires experience building and deploying recommendation systems in production environments. Google offers a dynamic and challenging work environment with opportunities for professional development and growth.