Abir Chatterjee

Proof of Experience

Ralakde Automation UK · Nov 2025 – Sep 2026

Architected and built NeuraOne, a production-ready multi-tenant SaaS platform with 5 business apps (CRM, Finance, Inventory, Portal, Repairs) using Django 5.1, React 18, and PostgreSQL.
Implemented schema-based multi-tenancy with complete data isolation, tenant-scoped JWT authentication, and 12-permission RBAC system serving 500+ concurrent users.
Developed full Finance module with AR/AP workflows, HMRC VAT compliance, FIFO inventory costing, multi-currency support, and 50+ dynamic reports (PDF, XLSX, CSV).
Built 100+ REST APIs, 62+ database models, Redis caching with graceful fallback, and optimized queries with 20+ compound indexes.
Leveraged Claude AI and prompt engineering techniques for accelerated development workflows, code review assistance, and technical documentation.

Opvia.in · Apr 2025 – Jun 2025

Built cross-platform EV Charging App using React Native with BLE integration for real-time charger communication (start/stop charging, status updates, error handling); admin dashboard in React.js.
Implemented map-based station discovery, charger availability updates, wallet-based payments, charging history, and Google Maps integration for navigation.
Set up real-time alerts, remote logging, and push notifications for events like "charging started", "charging complete", and low balance warnings.
Developed Online Petrol Pump platform with mobile/web interfaces for fuel delivery requests, live tracking of delivery agents, order history, and automated invoice generation.
Implemented MongoDB data storage with Node.js microservices and Redis for caching/session management; designed secure RESTful APIs for app-backend communication.
Followed scalable folder structures and best practices for clean, modular, production-grade code; used Git/GitHub for version control and code reviews.

Webhibe · Oct 2024 – Feb 2025

Led development of UrbanRider/UrbanDriver (Uber clone) with distinct rider/driver flows, authentication systems, and UI logic.
Implemented live location tracking, ride request handling, driver availability, and navigation using Google Maps API and Geolocation; built real-time communication with Firebase Realtime Database and FCM.
Integrated wallet system, ride history, rating system, and support features for the ride-hailing platform.
Built Bus Booking Platform (RedBus clone) with dynamic seat selection, search filtering, calendar/time picker components, multi-step checkout, and push notification alerts.
Developed E-Commerce App using React Native with product catalog, cart management, search/filter, saved items, in-app purchases, and Razorpay/Stripe payment integration.
Applied Redux Toolkit state management; optimized performance with FlatList virtualization, lazy loading, React.memo, and FastImage caching.
Worked with native modules, integrated platform-specific functionalities, and troubleshot Android/iOS build issues; collaborated on API definitions and code reviews.

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Maulana Abul Kalam Azad University of Technology · 2021 — 2025