ZUBER KHAN

Developed and maintained scalable backend services and enterprise APIs for transaction-driven applications. Built secure multi-role dashboards (Admin, Vendor, Dealer) with RBAC and JWT authentication. Improved CMS page-speed performance by 40% through optimized API batching, caching layers, and reduced blocking operations. Analyzed backend and database performance issues and optimized queries, API processing, and data-access operations, improving API response time by approximately 25%. Designed and implemented database-driven business logic using SQL, relational database concepts, transactions, and optimized data-access layers. Integrated third-party APIs for payment, notification, and external business services

Developed backend functionality for product catalog, customer accounts, shopping cart, checkout, order management, and marketplace operations. Built REST APIs supporting product, customer, order, seller, and administration workflows. Built and integrated an AI-powered chatbot solution, optimizing response latency. Delivered a Progressive Web App (PWA) using Vue.js for a mobile-like user experience, optimizing rendering and bundle size. Integrated payment gateways and shipping APIs with transaction status handling and error recovery. Implemented multi-vendor business workflows supporting seller onboarding, product management, commissions, and order fulfillment

Developed an enterprise ERP and CRM platform for managing business operations, employees, customers, finance, inventory, and internal workflows. Integrated third-party APIs for authentication, payments, and communication across enterprise workflows. Improved backend communication through optimized data handling, reducing response times by ~20%