Close is hiring a Senior Backend Engineer for the CRM team (USA-only, remote). Responsibilities include rearchitecting the core CRM data model, designing migrations, improving search and retrieval (Elasticsearch), shipping AI-native features (LLM-backed/agentic), and keeping hot paths fast. Tech stack: Python (Flask/FastAPI), MongoDB, PostgreSQL, Elasticsearch, Redis, TaskTiger, Docker, Kubernetes, and AWS (EKS, MSK, RDS, ElastiCache, EC2).

Close seeks a Senior/Staff-level Backend Engineer for a new Backend Platform team (one of the first hires). The role focuses on building internal developer platforms (DevDawg, Spice), shared API foundations (REST/GraphQL/OpenAPI), modernization of backend frameworks (Flask → FastAPI and others), observability and production readiness, eventing and migration guardrails, and constraints for safe use of coding agents. The stack includes Python, Flask, FastAPI, TaskTiger, MongoDB, PostgreSQL, Elasticsearch, Redis, Kafka, Docker, Kubernetes, AWS, Terraform, Ansible, and GitHub Actions. Position is USA-only and 100% remote.

Close is hiring a Senior Backend Engineer (US-only, remote) to build and operate Python Flask services, agentic AI features, and integrations. The role involves working with AWS (EKS, RDS, MSK, ElastiCache, EC2), databases (MongoDB, PostgreSQL, Elasticsearch, Redis), containerized deployments (Docker, Kubernetes), infrastructure-as-code (Terraform, Ansible), and modern AI tooling (Pydantic, Temporal, LangFuse). Candidates will join one of several backend teams focused on agents, communications, CRM, or growth and should have experience shipping production LLM-backed features and operating reliable services at scale.