
Letting Data Speak!
Case Study
WhatsApp-Based EV Cab Booking Platform

About the Client
An electric vehicle cab booking service provider seeking to revolutionize urban transportation through sustainable mobility solutions. Their latest venture 'Greentrip' is an all-electric vehicle airport taxi service revolutionizing travel experience by combining environmental sustainability with cost-effectiveness. The company operates with lower costs than traditional taxis, passing savings to customers while offering competitive rates without compromising on comfort or convenience.

Challenge
The client previously operated their EV cab service entirely through manual processes, which created significant operational bottlenecks and scalability limitations. They needed to transition from manual booking operations to a fully automated system powered by WhatsApp Business API. The technical requirements included building robust backend architecture to handle booking requests, manage user data, dispatch cab bookings efficiently, and store all transaction data reliably in a centralized system. Critical challenges encompassed developing automated message parsing logic for WhatsApp integration, implementing real-time trip status updates, creating a scalable architecture to handle concurrent booking requests, and establishing proper data management through a structured relational database with appropriate schema and indexing.

Key Results
Reduced manual booking efforts by 80%, allowing customers to book EV cabs via WhatsApp in a single, seamless message flow.
Eliminated 90% of manual admin and driver coordination, fully automating trip assignment, status updates, and driver dispatch.
Cut booking response time by 80% through a structured backend architecture and instant trip confirmation, improving the end-user experience.
Strengthened system resilience and uptime with robust architecture and automated error handling, ensuring continuous, reliable service.
Solution
We designed and developed the entire backend architecture using Python, ensuring seamless communication with WhatsApp Business API. The solution included developing automated message parsing logic and booking workflows for handling user interactions on WhatsApp, implementing trip dispatch and user notification modules using asynchronous processing for real-time updates, and deploying a highly normalized PostgreSQL schema to store all trip data, booking history, and customer details.
We integrated real-time trip status and notifications systems to inform customers throughout their journey and set up load balancing to allow smooth scalability as the service demand increases. The architecture was built with microservices principles to ensure modularity and maintainability while supporting concurrent user requests efficiently.

Technologies Used
WhatsApp Business API
Python
PostgreSQL
FastAPI
Cloud servers
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