Subscription Billing SaaS
A multi-tenant SaaS that helps service businesses manage plans, invoices and recurring payments in several currencies.
- Industry
- Financial technology
- Category
- SaaS platform
- Type
- Concept Project
- Project code
- NX-C03
Concept projects are explorations by Nexora. They are not client engagements and contain no client data or results.
The challenge
Small service businesses often bill recurring customers by hand: spreadsheets for plans, invoices written one by one and payment follow-ups by message. Errors and late payments become routine.
The solution
A multi-tenant platform with plan management, automated invoicing, payment links, reminder schedules and a self-service customer portal, with tax fields configurable per country.
Key features
- 01
Plans and proration
Monthly and annual plans, add-ons, upgrades and fair mid-cycle adjustments.
- 02
Automated invoices
Bilingual invoices generated on schedule, numbered consistently and archived.
- 03
Payment links and reminders
Customers pay from a link; overdue invoices follow a configurable reminder sequence.
- 04
Customer portal
Customers download invoices, update payment details and change plans themselves.
Visual gallery
Development approach
- 01
Ledger-first data model
Every charge, credit and refund is an immutable entry, so balances can always be explained.
- 02
Tenant isolation
Row-level security keeps each business's customers and invoices strictly separate.
- 03
Currency-aware from day one
Amounts are stored with their currency and rounding rules, never as bare numbers.
Technology stack
- Next.js
- TypeScript
- Node.js
- PostgreSQL
- Stripe Billing
- Redis queues
- Docker
Outcomes
This is a concept project, so there are no client outcomes to report. Verified results are only published for real client work.
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Building something similar?
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