The MTS 1, Software Engineer position at eBay involves designing and writing high-performance code, tests, and documentation for the Identity team. This role focuses on Identity Services, including user onboarding, authentication, authorization, and identity verification. The engineer will be responsible for guiding technical decisions, mapping business problems to solutions, and ensuring engineering excellence in security, scalability, and performance. The position requires collaboration with team members to break down project features into manageable tasks and drive observability in production environments.