SAAS · DATABASE CORRECTNESS
Multi-tenant operations with financial safeguards.
Built society administration across Next.js interfaces, NestJS APIs, and PostgreSQL. The financial model combines exact-money arithmetic, transactional allocation, and accounting constraints.
Workflow at a glance
- Tenant scope
- Permission
- Transaction
- Audit
The problem
Society administration brings together members, organizational scopes, permissions, and financial records. Payment operations need consistent accounting even when requests are repeated or arrive concurrently.
What I built
- Built multi-tenant administration interfaces, supporting NestJS services, and PostgreSQL database structures.
- Worked on authentication and server-side permissions across society, sector, and member access scopes.
- Connected application modules and administration workflows across the frontend and backend.
Platform capabilities
Described at platform level, separately from my individual contributions above.
Money represented exactly
The financial model uses exact-money arithmetic and transactional payment allocation, with idempotent requests and double-entry accounting.
Consistency at the database boundary
Database constraints support accounting consistency and auditable corrections alongside application-level validation.
Failure paths covered
Repository tests cover concurrent requests, access boundaries, rounding, and transactional failure paths. Delivery assets include container and migration configurations.
How this is supported
The financial model and listed test scenarios are supported by repository review. Safeguards and tests are presented as platform capabilities. This is a separate implementation from the PHP society billing application.
This is company work at Finovel Fintech Private Limited. The source code, integrations, and customer data are private, so there is no public repository or screenshot for this project.
Takeaway
Application-level permissions supported by transactional and database-level financial safeguards.