Backend Engineer: SaaS Billing & Payments

Simular is building AI agents that help people and businesses get work done, with a focus on accounts, subscriptions, billing, and access provisioning. You will own domain models for customers, organizations, plans, and entitlements, and build robust billing systems with metering, invoicing, and failure handling. You will partner with product teams to translate commercial requirements into maintainable systems while upholding high correctness and operational ownership in financial processes.