MarWeb SEO Audit

A SaaS Platform for Technical SEO Auditing Built for Scalability, Automation, and Monetization

Project Overview

MarWeb SEO Audit is a SaaS application for technical and on-page SEO auditing, designed to automatically crawl any website, analyze all discovered URLs in real time, and generate structured, actionable reports at both page and site level. The platform was built to eliminate manual audits, standardize SEO analysis, and enable scalable monetization through subscriptions.

The product is engineered with a system-first mindset: clear domain modeling, extensible architecture, and full automation of the audit pipeline.

Architecture and Engineering Approach

The application is developed as a SaaS product using DDD (Domain-Driven Design) and Clean Architecture, with strict separation between domain, application, and infrastructure layers.

• Service-oriented architecture with clearly defined responsibilities
• Explicit domain modeling: Project, Audit, Page
• Multi-tenant ready design for subscriptions and white-label use cases
• Built for extensibility and API-driven integrations

The production implementation uses:

• Backend: Java (Clean Architecture, DDD)
• Frontend: Angular
• Database: PostgreSQL
• SaaS & Billing: Stripe (subscriptions, plans, usage limits)

An initial proof of concept was developed using FastAPI + React + MongoDB to validate the real-time crawling and streaming workflows, later migrated to an enterprise-oriented stack.

Core Features

• Full-site crawling with real-time progress
• Per-page SEO analysis:
  • HTTP status codes, meta title, meta description
  • Headings (H1–H6), canonical, hreflang
  • Indexability, robots.txt, meta robots
  • Internal and external links
  • Missing image alt attributes, schema types
• Per-page SEO scores and overall audit score
• Audit history and comparisons
• CSV and PDF report exports
• Project and page dashboards with filtering and search
• Streaming audit results (SSE)
• Google OAuth authentication and user management

SaaS and Monetization Capabilities

• User plans: Free, Pro, Agency
• Configurable limits per plan: number of projects, pages, audits
• Stripe-based payments and subscriptions
• Real-time usage monitoring and UI feedback
• Architecture designed for:
  • White-label deployments (custom branding, branded reports)
  • Public API for third-party integrations
  • Custom frontends per brand (self-hosted or embedded)

Business Impact

• Fully eliminates manual SEO audit processes and repetitive work
• Standardizes technical SEO analysis across teams and agencies
• Enables large-scale audit delivery without proportional cost increases
• Establishes a standalone, monetizable SaaS product
• Provides a robust technical foundation for enterprise integrations and agency workflows

Conclusion

MarWeb SEO Audit is built with a true software engineering mindset rather than as a one-off tool. Through DDD, Clean Architecture, and a scalable SaaS model, the platform transforms SEO auditing into an automated, predictable, and monetizable process—demonstrating how well-designed architecture can support both technical excellence and long-term business growth.