Architecture Layers

Frontend Architecture

The application uses the Next.js App Router with the following structure:

app/
├── (auth)/         # Auth routes (login, register)
├── (protected)/    # Protected routes
├── dashboard/      # Dashboard features
├── clients/        # Client management
├── invoices/       # Invoice management
├── products/       # Product management
└── settings/       # User settings

The frontend leverages modern development practices like component-based architecture, React Context, and custom hooks to manage state efficiently.

Backend Services

The platform uses Supabase for backend services, including:

  • Authentication & Authorization with JWT and OAuth integration.

  • Real-time Database with subscriptions for live updates.

  • Row Level Security for granular access control and policy-based data access.

  • Storage for managing user-uploaded documents.

Database Structure

The system is built around core tables that support key features:

  • clients – stores client data.

  • invoice_companies – stores companies related to invoices.

  • invoices – contains invoice details.

  • invoice_items – line items for each invoice.

  • product_lines – product catalog for invoices.

APIs

APIs are implemented via Supabase Client for:

  • Auth API – managing user authentication.

  • Database API – querying and managing the database.

  • Real-time Subscriptions – enabling live updates.

  • Storage API – uploading and retrieving files.

Infrastructure

Deployment Architecture

  • Frontend: Hosted on Netlify for static site generation.

  • Backend: Deployed on Supabase Cloud.

  • Database: Powered by Supabase Postgres with RLS for enhanced security.

Security Measures

The platform employs robust security mechanisms:

Authentication

  • JWT-based authentication.

  • OAuth integration with providers like Google.

Authorization

  • Row Level Security (RLS) policies for access control.

  • User-scoped data access.

Data Protection

  • Input validation using Zod.

  • Type safety with TypeScript.

  • Prepared statements to prevent SQL injection.

Scalability Considerations

Frontend

  • Static page generation for improved performance.

  • Code splitting and dynamic imports for faster loading.

Backend

  • Efficient Row Level Security policies.

  • Indexed queries to optimize database performance.

  • Connection pooling for high concurrency support.

Technical Specifications

Programming Languages

  • TypeScript for frontend and backend logic.

  • SQL (PostgreSQL) for database queries.

  • CSS (Tailwind) for styling.

Core Dependencies

Key libraries and tools used in the platform include:

{ "next": "14.1.0", "react": "18.2.0", "typescript": "5.3.3", "@supabase/auth-helpers-nextjs": "0.9.0", "@react-pdf/renderer": "3.1.14", "tailwindcss": "3.4.1", "i18next": "23.10.0" }

Development Tools

  • Package Manager: npm

  • Build Tool: Next.js built-in

  • Type Checking: TypeScript

  • Linting: ESLint

  • Formatting: Prettier

Version Control Strategy

The project follows modern version control practices:

  • Feature-based branching for parallel development

  • Conventional commits for meaningful and consistent commit messages

  • Semantic versioning for clear release management

  • Environment-based configuration for deployment flexibility

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