Senior Backend & Infrastructure Engineer (AI/FinTech)

We're placing a Senior Backend & Infrastructure Engineer with a confidential AI-powered FinTech client approaching enterprise rollout. This is a pure infrastructure and security role — you own the architecture that keeps sensitive financial data secure, the systems that stay up when enterprise clients depend on them, and the integrations that connect LLM pipelines to ERP data without leaking either. The platform is past the prototype stage. They need someone who's built production-grade backend…