Bulk SMS, WhatsApp & Email Messaging Platform
Custom DLT-compliant bulk SMS, WhatsApp Business, and email messaging software with REST API automation engineered in Ahmedabad, India.
Project Overview
When Indian enterprises and marketing teams need to send high-volume notifications across SMS, WhatsApp Business, and Email, relying on fragmented foreign tools creates regulatory hurdles and high recurring software costs. We engineered this custom multi-channel bulk messaging platform from the ground up using ASP.NET Core, Angular, SQL Server, Redis, and RabbitMQ. Developed specifically for the Indian market by our engineering team in Ahmedabad, India, the application empowers businesses to import contacts, manage TRAI/DLT-approved message templates, execute high-volume campaigns across Indian telecom gateways, and consume REST APIs to automate message dispatch from their existing software systems.
The Challenge
Sending high-volume communication in India requires strict compliance with TRAI DLT (Distributed Ledger Technology) template scrubbing regulations, high-speed telecom gateway routing, and developer-friendly automation. The client needed an enterprise messaging engine built for India to solve core operational bottlenecks:
- Strict TRAI DLT compliance errors causing bulk SMS campaign failures and template rejection across Indian telecom operators (Jio, Airtel, Vi).
- High failure rates and message throttling during peak dispatch across WhatsApp Business and SMS gateways.
- Manual contact list importing and lack of centralized template governance for regional Indian messaging.
- Inability for existing ERP, CRM, or billing software to seamlessly trigger automated transactional alerts.
Our Solution
We engineered a high-throughput ASP.NET Core backend paired with an asynchronous message queuing architecture optimized for Indian telecom routing:
DLT-Compliant Queueing & Dispatch
Integrated RabbitMQ and Redis with ASP.NET Core to handle asynchronous message queuing and automatic TRAI DLT template validation, ensuring thousands of SMS, WhatsApp, and email messages are dispatched reliably across Indian operators without gateway throttling.
REST API Automation Engine
Built a comprehensive developer API suite that allows external software (ERPs, CRMs, billing systems) to consume endpoints for instant, automated notification triggering and status webhook tracking.
Business Impact
The platform established itself as a reliable, high-throughput communication infrastructure for Indian enterprises:
3x
Higher conversion rates
20%
Reduction in user churn
50%
Increase in campaign ROI
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