-Developed and deployed a multi-tenant PBX system with features such as call handling, routing, reporting, conferencing, forwarding, call queues, and more. Managed full-stack development and Asterisk integration.-Spearheaded the development and integration of multiple APIs, including Google, Hetzner, various DID provider APIs, custom APIs, and Asterisk event capturing to enhance system functionality and provide tailored solutions to clients.-Designed and deployed a real-time call monitoring wallboard, improving operational efficiency by providing live call statistics and call status tracking through real-time event capture using PHP Asterisk Manager Interface (PAMI).-Customized and managed client-specific features, provided level-one technical support, and trained the technical support team to assist clients effectively. Ensured the timely delivery of tailored solutions, consistently exceeding expectations.-Led the integration of Android and iOS applications via APIs, ensuring seamless communication and functionality across platforms.

1. Sophisticated IVR System Development (FreeSWITCH & LUA scripting)- Engineered a multilingual IVR system using FreeSWITCH and LUA scripting, integrated with a PHP-based web interface. - Features included group audio message recording, playback, and functionality for regions with internet restrictions, similar to WhatsApp. - Integrated Azure’s Text-to-Speech and Speech-to-Text APIs for enhanced user experience and accessibility.2. Web Interface for Kamailio Configuration and Management- Designed and developed a web interface for Kamailio, incorporating call reporting, live call tracking, DID load balancing, and SIP tracing. - Led seamless integration with Kamailio’s backend to meet specific client requirements. - Implemented Kamailio billing solutions for accurate tracking and invoicing.3. Kamailio Billing and Reporting System- Developed and integrated a comprehensive billing and reporting solution for Kamailio, enabling accurate usage tracking and invoicing. - Created custom reporting tools to provide detailed call data analysis and insights, helping clients optimize their operations and resources. - Ensured seamless integration with Kamailio's backend systems for efficient data management and reporting.4. Call Monitoring Wallboard API Development - Designed and developed multiple APIs for a real-time call monitoring wallboard, using PHP CURL scripting and integrating Asterisk AMI and PAMI. - Captured and analyzed live data to provide actionable insights into call metrics and operational performance.