Arpan Das

33% Cost Reduction: Integrated SMS services with different Provider, slashing operational costs by a third for high-volume messaging. 10x Throughput Increase: Boosted SMS sending capability from 20/sec to 200/sec using AWS Lambda, SQS, S3, facilitating large-scale campaigns with zero downtime. Resolved critical security vulnerabilities and strengthened application security controls to support successful ISO 27001 certification. AWS Lambda Optimization: Deployed and coordinated 4 Lambda functions for parallel SMS processing, achieving near real-time delivery.

Integrated Log Monitoring: Connected server logs with AWS CloudWatch, achieving 100% improvement in log monitoring efficiency and enabling real-time observability for key platform metrics. Video Storage Optimization: Utilized FFmpeg for advanced video compression, resulting in a 30% reduction in S3 bucket storage consumption and optimized media costs. Third-Party Platform Integrations: Seamlessly integrated Zoho, HubSpot, ActiveCampaign, and GoHighLevel, driving a 40% increase in customer acquisition and expanding CRM capabilities. Real-Time Data Sync: Implemented Socket.IO alongside MongoDB Change Streams to enable real-time client data updates, reducing redundant API calls by 40% and minimizing server load. Advanced Analytics & Payments Engine: Developed automated analytics generation and user auto top-up functions using Redis and Bull, and integrated Stripe for flexible purchase credits and recurring subscription management. Database Performance Tuning: Optimized MongoDB indexing strategies, resulting in a 50% boost in overall query performance for high-traffic endpoints. Scalable Lambda Architecture: Architected and optimized multiple AWS Lambda functions, enhancing cloud application scalability and supporting high-volume operations.

Front-End Development: Engineered an intuitive and fully responsive user interface for the platform using React, Ant Design (antd), and Material UI. Empowered users with seamless management of SMS campaigns, streamlined creation and editing of message templates, and advanced campaign performance tracking. Database Optimization: Leveraged RedisDB and MongoDB for efficient data storage and retrieval, ensuring high platform reliability and rapid response times for user operations. Automated Scheduling: Developed a sophisticated scheduling feature utilizing Bull and Redis, enabling automated and flexible campaign scheduling to enhance user productivity and engagement.