PrintNinja

Inherited an environment with no version control, fragmented contractor code, and significant technical debt. Needed to build a Configure-Price-Quote (CPQ) platform to replace manual quoting processes while migrating critical business logic from legacy PHP systems.

The platform needed to handle complex pricing with 500+ variables across 4 product lines, integrate with Stripe for payment processing, sync with Salesforce CRM, and support file uploads with PDF validation.

As the sole engineer, I designed, built, and deployed the entire platform from the ground up:

• 230,000+ line full-stack platform using Next.js, React, TypeScript, and PostgreSQL
• Real-time pricing engine handling 500+ variables across 4 product lines with LRU caching
• Stripe payment integration with webhook processing
• Salesforce CRM sync with 80+ custom field mappings across 10 modules
• Multi-carrier shipping integration (ShipStation, UPS, TForce Freight)
• Self-hosted Docker infrastructure with blue-green deployment and automated backups