Python/React Developer for SaaS

We’re seeking an expert Python/React developer to help build and maintain a multi-tenant SaaS platform. You’ll work on a forecast service using Python/FastAPI, a React + TypeScript operator console, a Claude-powered WhatsApp accountant agent, and an ongoing migration to multi-tenant architecture with row-level security and usage-based billing. The role requires strong Python experience, React/TypeScript proficiency, PostgreSQL expertise, and a proven ability to ship reliable production software independently. Experience with LLM workflows, time-series forecasting, and ERP or fintech integrations is a plus.