4 posts
Your BookStore API now has 200 customers who each want their own data. One missing WHERE clause leaks tenant data and kills the company. Here is how to make cross-tenant data leakage structurally impossible with context propagation, session events, and row-level isolation.
13 min readWithout rate limiting, one tenant's bulk import consumes all your database connections and API throughput. Here is how to build tiered, sliding-window rate limiting in Python with Redis — protecting every tenant from every other tenant.
11 min readA naive ALTER TABLE on a 100M-row table locks it for minutes. Multi-tenant makes it worse: one failed migration across 200 schemas leaves tenants on inconsistent versions. Here is the expand-contract pattern and the tooling to migrate safely.
14 min readA single tenant data leak can end your SaaS business. SOC 2 and GDPR demand audit trails, scoped access controls, and data isolation verification. Here is how to build RBAC, API key management, and immutable audit logging into ShelfWise.
11 min read