Senior Backend Engineer — AI-Driven CRM (Remote)

Close is seeking a Senior Backend Engineer for the CRM team to rearchitect the core data model and enable AI-powered, scalable backend services. You will work across Python Flask/FastAPI servers, MongoDB, Elasticsearch, Redis, and PostgreSQL, shaping how leads, contacts, and opportunities are stored and queried. You’ll collaborate on AI-native features, performance optimizations, and migrations; this role requires architectural thinking and a track record of delivering robust systems in