Project Overview
CallSling is a multi-tenant call tracking and management SaaS platform for agencies managing multiple client companies. It handles inbound calls with advanced call routing, real-time monitoring and campaign-based call tracking, and integrates AI-powered voice agents and IVR to automate call handling, qualify callers and route calls intelligently — with analytics and reporting for actionable insight into call performance and marketing ROI.
My Role
- Sr. Software Engineer (Developer & Lead) — built from scratch, start to end
- Engineered and developed the backend & APIs, and the React frontend structure with base components
- Engineered the call routing algorithm per business logic and IVR using the Twilio enqueue approach
- Engineered tuned and dynamic AI voice agents using RAG with VAPI and Bland AI
- Implemented Redis caching; set up CI/CD and Docker as DevOps
- System design and PR reviews as lead
Key Features
AI Voice Agents
Multi-lingual, context-aware voice agents with customizable personalities — tuned dynamically using RAG with VAPI and Bland AI.
Advanced Call Routing & IVR
Business-logic-driven call routing algorithm built on the Twilio enqueue approach with full IVR support.
Multi-Tenant Architecture
Agencies manage multiple client companies with campaign-based call tracking per tenant.
Call Tracking & Analytics
Real-time monitoring, campaign attribution, and reporting to measure marketing performance and lead quality.
Voicemail, SMS & Recording
Voicemail management, SMS integration and AI voice recording built into the call lifecycle.
Performance & DevOps
Redis caching, Dockerized deployments and CI/CD pipelines on AWS (EC2, S3, RDS).
Results & Impact
- Built the platform from scratch as developer and lead — system design, backend, frontend structure and DevOps
- Shipped production AI voice agents using RAG with VAPI and Bland AI
- Engineered the Twilio-based call routing algorithm and IVR flows
Technologies Used
Project Attribution
This project was developed while working at Brainx Technologies. Full project credits and intellectual property belong to Brainx Technologies. My role: Sr. Software Engineer & Technical Lead — system design, backend and API development, React frontend architecture, and deployment infrastructure.
Brainx Technologies is a leading software development company providing disruptive digital products and tech solutions to SMBs, Startups & Enterprises.
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