Python Engineer for Meta API Integration

We are seeking a Python automation engineer to wire real credentials into a fully-built marketing pipeline and launch our first live Meta ad campaign. The system is already written (~2,500 lines, well-commented); this is integration and validation work, not a build. Required: Python 3.9+, production REST API experience with OAuth and long-lived token management, macOS/terminal comfort, and pandas for data validation. Strong preference for hands-on Meta Marketing API experience (Graph API v17+, campaign/ad set creation, Insights API, pixel tracking, store-visit attribution). Secondary tasks include configuring Gmail SMTP for automated report delivery, setting up a launchd schedule on macOS, and producing a written handoff document a non-technical person can follow. Estimated 6–10 hours initial engagement with optional 5–10 hrs/month ongoing for token renewal and maintenance. This is not a web development or data science role — we need someone who has shipped production API integrations and can read an existing codebase quickly.