Senior Staff Backend Engineer - Financial Core

This role sits at the core of a rapidly evolving financial infrastructure powering a modern travel-tech SaaS platform. You will take ownership of a critical backend system responsible for financial accuracy, including revenue recognition, payments, ledger events, and profit calculation across a distributed environment. Rather than building from scratch, you will join an active evolution phase where foundational architecture already exists and is being expanded toward a more scalable and robust V2. The position requires deep technical leadership combined with hands-on engineering, ensuring the correctness and reliability of financial flows that directly impact business operations. You will collaborate closely with engineering and finance stakeholders to define invariants, validate system behavior, and guide architectural decisions. This is a high-impact role where your work becomes the backbone of financial truth for a growing SaaS ecosystem.