Accounting & E-Invoicing Compliance Workflows

Contributed to a Saudi-focused accounting and e-invoicing SaaS with ZATCA validation workflows. Work spans invoices, quotations, credit/debit notes, billing entitlements, team access and RBAC, expenses, purchases, and dashboards. I strengthened critical flows with explicit invoice lifecycle states, validation contracts, structured errors, background workers, and audit-aware correction paths. Stack: FastAPI, Python, PostgreSQL, Redis, Celery, React, TypeScript, Docker, and cloud/VPS deployment.