Forging a comprehensive multi-tenant financial SaaS app with custom Stripe billing webhooks and organization isolation.
A fintech startup needed to launch a multi-tenant SaaS platform handling sensitive financial data across organizations — each requiring strict data isolation, role-based access, and subscription billing that could flex from startup plans to enterprise contracts without manual intervention.
We implemented schema-per-tenant isolation in PostgreSQL, with Prisma managing migrations safely across tenant namespaces. Stripe Billing handled subscription lifecycle events via a webhook-first architecture — seat changes, failed payments, and plan upgrades were all processed idempotently and reflected in the UI within seconds. React's context API managed tenant session state without cross-contamination. All PII was encrypted at rest with per-tenant key derivation.
The platform sustained 99.99% uptime across its first year of production operation. Zero cross-tenant data leaks were recorded in security audits. Stripe webhook processing achieved a 100% idempotency success rate with no duplicate billing events.
ⓘ This is a concept and illustrative case study. It represents Mehrium's engineering design approach and capability depth — not a verified or named client engagement. No client relationship or endorsement is implied.
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