I developed the backend for Big League Construction Supply, a full-service platform for concrete construction teams, focusing on just-in-time logistics and on-site delivery. The platform supports product management, quote workflows, dispatch planning, and delivery tracking. My Solution: I engineered the backend using Node.js, Express, and a relational SQL database. The API layer was designed with modular services, validation middleware, and role-based access for operations staff. I integrated Amazon S3 for secure uploads and controlled file access for field documentation. The architecture aligns with Big League's logistics model, enabling structured scheduling, route-aware dispatch, and efficient jobsite fulfillment workflows. Key Features: REST APIs with Node.js and Express, backed by SQL data management. Amazon S3 for secure document upload and access. Quote Request Intake for job descriptions and consent capture. Google Maps API for route/distance optimization. Role-based Access for staff management and auditable workflows. Structured Scheduling and Route-Aware Dispatch for efficient on-site delivery. JIT Logistics ensuring timely product delivery and reducing clutter at job sites. Technology Stack: Node.js, Express.js, SQL for backend and database management. Amazon S3 for file management. Google Maps API for logistics and routing. Impact: The platform improved JIT on-site delivery, reduced delivery cycles, and streamlined field operations for concrete construction teams in Orlando, FL.