Hands On System Design - Distributed Systems Implementation

Hands On System Design - Distributed Systems Implementation

Day 110: Building Production-Grade Tenant Usage Reporting & Billing

Oct 10, 2025
∙ Paid

Working Demo Code:

Today's Mission: From Free-for-All to Fair-Pay

We're building the financial engine that powers multi-billion dollar SaaS platforms. Today you'll implement usage tracking and billing that rivals AWS CloudWatch pricing, Datadog's log management costs, and Splunk's enterprise billing systems.

Your distributed log platform now serves multiple tenants. Without proper usage tracking and billing, you're essentially running a charity. Today we transform your platform into a revenue-generating system with precise usage metering and automated billing.

What We're Building Today

Core System Components:

  • Real-time usage collector tracking every log byte ingested

  • Billing engine calculating costs across multiple pricing dimensions

  • Automated report generation with drill-down analytics

  • Usage-based quota enforcement preventing overuse

  • Professional billing dashboard with export capabilities

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