Case study
Confidential SaaS Platform
A production-oriented SaaS platform with role-based onboarding, secure document workflows, admin review tools and shared business rules across the stack.
What I built
Key product features
Technical approach
Tech decisions
- Shared TypeScript and Zod schemas to keep frontend and backend validation consistent.
- Role-based onboarding logic designed as explicit domain states instead of scattered UI conditions.
- Secure document upload flow with file validation, storage status and review tracking.
- Admin-facing workflows separated from user-facing onboarding to keep responsibilities clear.
Context
This project was built around a common SaaS problem: turning a complex onboarding and validation process into a clear product experience for multiple user roles.
Architecture
The platform uses Next.js for the user interface, NestJS for the API layer, Prisma with PostgreSQL for persistence, and shared TypeScript/Zod validation to keep frontend and backend contracts aligned.
Challenges
The hardest part was managing many business states without duplicating logic: user roles, onboarding progression, document status, admin review decisions and secure upload flows all had to stay consistent.
Outcome
The result is a maintainable fullstack foundation with typed API contracts, reusable validation, clear domain boundaries and production-ready workflow patterns.