Billing & Invoicing Systems

For agencies billing multiple retainers, blended hourly rates, and fixed-bid scopes simultaneously, standard accounting software simply breaks down. We engineer custom billing middleware that ingests complex pricing models, calculates precise labor margins, and executes automated payment capture securely.

Architectural Overview

Our financial data pipelines are built using strict, statically typed Go (Golang) microservices to ensure mathematical precision without runtime rounding errors. We leverage deeply nested relational databases (PostgreSQL) to map complex hierarchies of Master Service Agreements (MSAs) down to individual line-item deliverables. Payment tokenization is handled securely via direct Stripe API integration.

Core Capabilities

• Blended Rate Calculation Engines

  Algorithmic ingestion of time-tracking data that applies different billing rates depending on the specific team member's tier (e.g., Junior Designer vs. Senior Creative Director) and auto-generates the final client invoice.

• Automated Retainer Reconciliation

  Middleware that automatically deducts tracked hours from prepaid monthly retainers. If a client exhausts their block of hours, the system immediately triggers a Webhook to issue a mid-month top-up invoice.

• Contractor Payout Automation

  Integration with platforms like Wise API or Stripe Connect to automatically calculate and disburse payments to your global network of freelance creatives once a milestone is approved internally.

Technology Stack