Iurii Uses: #Auth

HTPBE? — Internal Admin Dashboard

Role-gated admin dashboard for the HTPBE? SaaS platform — real-time KPIs, per-user quota tracking, and a zero-dependency bar chart, all server-rendered via

vatnode — EU VAT Validation API

Developer-first SaaS API for EU VAT validation via VIES with Redis caching, change monitoring, and webhook notifications.

HTPBE? — Has This PDF Been Edited?

SaaS platform for PDF authenticity verification with a public REST API.

API key management for a public SaaS: hashing keys at rest, prefix + last-4 display, fail-closed validation, and revocation — plus the scoping, rotation, and

Gated B2B pricing in Next.js: per-account price lists, server-side access control so prices never leak to crawlers, and a deal-record data model where every

JWT vs sessions vs OAuth for SaaS: token invalidation, mobile clients, refresh token rotation, and a decision matrix to pick the right auth pattern.

40+ point production SaaS checklist: auth, Stripe billing, PostgreSQL, rate limiting, email, monitoring, and security — with honest 8-week build estimates.