Handling sensitive data? "It works" is not enough — it needs to resist, log, and prove.

This is the top tier, built for regulated and data-sensitive products: password hashing with Argon2, encryption of sensitive fields with Fernet (including zero-downtime key rotation), a transactional access audit trail, UUID keys against enumeration, and security headers with a TLS policy enforced by tests. Observable in practice: one JSON log line per request with request ID and sanitized paths, /health and /metrics endpoints in Prometheus text format.

Included: up to 20 REST endpoints, PostgreSQL + SQLAlchemy 2.x + Alembic, JWT auth with refresh rotation and admin roles, rate limiting, pytest security suite, hardened non-root Docker image behind a TLS proxy (Caddy), plus deployment support on your cloud of choice and a handover walkthrough. Full source code, docs and IP transfer on delivery.