Replatforming a SaaS starter into a production-ready growth engine

Migrated a bloated starter app into a lean Next.js platform with typed APIs, Stripe billing, and a reliable auth flow that reduced onboarding friction and increased paid conversion.

The challenge

The product had grown quickly without strong boundaries, causing brittle deployments, slow onboarding, and frequent regressions in billing and authentication.

The approach

• 01Defined clear route boundaries with an app-first architecture and stricter TypeScript contracts for API payloads.
• 02Refactored auth and payment flows with better error handling, idempotent callbacks, and safer webhook logic.
• 03Introduced focused test coverage around high-risk paths: registration, upgrade, downgrade, and account recovery.

The outcome

The team shipped faster with fewer production incidents and materially improved trial-to-paid conversion after onboarding friction dropped.