Security Is a Product Feature
Customers evaluate SaaS on trust as much as features. Hardening is not a one-time checklist — it is continuous design: least privilege, defense in depth, and fast recovery.
Auth and Authorization
Never trust the client for role checks. Enforce authorization on the server and in the database (RLS). Scope every query to the authenticated tenant or user.
Secrets and Dependencies
Rotate keys, keep service-role credentials off the browser, and pin dependency versions. Scan for CVEs in CI and block merges that introduce known critical issues.
Practical Next Steps
Start with an inventory of public endpoints, admin surfaces, and file uploads. Fix IDOR and missing validation first — they are the most common production incidents we see.