Senior Software Engineer – Backend (USA Only - 100% Remote)

Close is hiring a Senior Software Engineer focused on backend work for its fully remote, USA-only team. The role involves building and improving the company’s sales CRM, with an emphasis on AI features, backend services, APIs, and infrastructure that support a communication-first product. It uses a Python-based stack with Flask, MongoDB, PostgreSQL, Elasticsearch, Redis, AWS, Kubernetes, Docker, and automation tools such as Terraform and Ansible. This position suits an experienced engineer who enjoys working on scalable systems, automation, and product-led software in a small, profitable company.