A Senior Full-Stack Engineer will lead the architecture and development of a multi-tenant SaaS platform designed for regulated financial and government procurement workflows. This role involves owning end-to-end product surfaces, including configurable admin panels, tenant-aware data models, fee calculation engines, payment lifecycle tracking, and audit-ready financial exports. Ideal candidates will have experience as the lead or sole developer on a significant SaaS platform and will be comfortable making architecture decisions across the stack.

• Platform Architecture: Own architecture decisions across frontend, backend, data, and infrastructure for a multi-tenant SaaS product; balance configurability with maintainability.
• Tenant-Level Configurability: Build admin-managed configuration for fee models, reporting periods, grace periods, escalation rules, branding, and integrations without req...