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Sigma ERP – Pharmacy & Business Management System
Designed and developed a comprehensive ERP system tailored for pharmacy and retail businesses, covering inventory, GST compliance, sales, and accounting operations. Implemented batch-wise stock management with expiry tracking, automated GST calculations, invoicing, and profit–loss reporting. Built a multi-user, role-based access control system to securely manage operations across stores and warehouses. Integrated POS billing with real-time stock updates and warehouse management. Enabled automated WhatsApp communication using Evolution API (scan-and-connect model) along with email and SMS notifications for invoices, quotations, and transactional updates. Focused on accuracy, regulatory compliance, and scalability for real-world business usage.
CloudSchool ERP
Developed a cloud-based ERP solution for end-to-end school management, streamlining academic, administrative, and financial operations. Implemented student enrollment, class and section management, attendance tracking, examination and result processing, and fee management. Built role-based access control for administrators, teachers, staff, students, and parents. Integrated automated notifications via email, SMS, and WhatsApp for attendance, fees, and academic updates. Designed secure data handling, scalable architecture, and centralized dashboards to improve operational efficiency and transparency across the institution.
Knock Quist
Developed a mobile sales tracking application for on-field agents using React Native and Firebase to monitor leads, visits, and sales activities in real time. Implemented secure authentication, role-based access, and cloud-synced data storage to ensure consistency across devices. Built dashboards for tracking agent performance, daily activity logs, and sales progress, enabling managers to monitor field operations efficiently. Optimized the app for offline usage with automatic data sync when connectivity is restored.
Dabbawali – Online Home-Cooked Meal Delivery Platform
Designed and developed a full-stack food delivery platform focused on Bengali home-cooked meals, enabling customers to browse menus, place orders, and manage subscriptions through a user dashboard. Built an admin panel for order management, menu control, pricing, and delivery coordination. Implemented user authentication, order lifecycle tracking, and notification workflows to handle daily meal operations efficiently. Focused on reliability, role separation, and scalable architecture suitable for recurring food delivery use cases.
QuickLedger
Developed an offline-first ERP billing and accounting application for SMEs using Electron.js, designed to run reliably without internet dependency. Implemented billing, invoice generation, customer management, and local data storage to ensure fast and secure operations. Built a desktop-grade UI with system-level access suitable for small businesses needing standalone accounting solutions. Focused on performance, data persistence, and usability for non-technical business users. Delivered as a production-ready desktop application for Ashu Technically.
Book My Event – Event Booking & Management Platform
Developed a full-stack event management and ticket booking platform that allows organizers to create events, design seating layouts, manage bookings, and automate payments and communications. Implemented end-to-end booking workflows with real-time seat allocation, coupon and discount management, and secure multi-gateway payment integrations including PhonePe, Razorpay, and Cashfree. Built automated WhatsApp, SMS, and email notification systems for booking confirmations and updates. Designed role-based user management, event-level access control, and integrated accounting modules for transaction tracking, reconciliation, and reporting. Focused on scalability, reliability, and seamless user experience for both organizers and customers.
Lead Generation Automation – n8n Workflow
Designed and implemented an automated lead generation system using n8n that extracts business data from Google Maps and stores structured leads in Google Sheets. Built end-to-end workflows to collect business names, categories, locations, contact details, and URLs with minimal manual intervention. Implemented data validation, duplication checks, and scheduled executions to maintain clean and up-to-date lead records. Reduced manual lead collection effort significantly by replacing repetitive research tasks with automated pipelines.
Customer Support Automation – n8n WhatsApp Chatbot
Built an automated customer support chatbot using n8n with WhatsApp integration to handle inbound customer queries and routine support workflows. Designed message-based flows for FAQs, order/status inquiries, and escalation to human agents when required. Integrated structured data storage for conversation logs and ticket tracking, enabling follow-up and reporting. Implemented conditional logic, error handling, and webhook-based message processing to ensure reliable, real-time customer communication.
WhatsApp Outreach Automation – n8n & Evolution API
Developed a WhatsApp messaging automation system using n8n and Evolution API to send large-scale outbound messages with human-like behavior patterns. Implemented multiple message templates with randomized selection, variable delay intervals between messages, and controlled sending logic to reduce detection and improve delivery reliability. Designed workflows for campaign scheduling, contact batching, failure handling, and delivery logging. Focused on realistic message flow, system stability, and operational control rather than brute-force blasting.
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