Brajmohan Kumar

I am a System Engineer specializing in Asterisk-based VoIP and Contact Center (CCaaS) platforms, with hands-on experience designing, deploying, and maintaining production-grade telecom systems.

I’ve worked extensively on

• Asterisk (AGI, AMI, SIP, PJSIP)
• Linux-based VoIP infrastructure
• Call routing, recording, logging, and analytics
• Backend APIs using PHP, FastAPI, MySQL, PostgreSQL

My work includes building scalable, secure, and reliable voice platforms for real-world business use cases, including integrations with CRM systems and custom reporting.

Work Experience

Position: Software Engineer (July 2007 - Present)

Company: Meridium Technologies Pvt Ltd

• Built Voice Logger for prisons in Jharkhand to help them contain the issue of illegal mobile phones inside prisons. Developed the solution with Asterisk, AGI, PHP, Bootstrap and MySQL
• Developed Call Broadcasting, ACD and IVR solutions for clients with Asterisk, AGI, PHP and MySQL
• Developed custom features, reports, did bug fixing and improvisation of Dialmantra on-premises dialer capable of handling inbound/outbound calls through SIP trunks and PSTN/PRI Lines
• Integrated APIs like Amadeus and HotelsPro and payment gateways/APIs like Authorize.net, E-xact and Stripe with websites and custom CRMs developed to streamline businesses
• Deployed solutions and worked on cloud platforms including AWS, GCP, DigitalOcean, Vultr etc.
• Integrated various hardware with Asterisk including FXO/FXS gateways, IP Phones, PRI Cards and USB Cards
• Integration, debugging and troubleshooting of Asterisk with different SIP trunk providers
• Experience of working on platforms like didww.com, tollfreeforwarding.com, Twilio and 8x8
• Developed many websites and CRMs with PHP, Bootstrap, MySQL etc
• Customization and troubleshooting of VICIDIAL for clients

Position: Senior Software Engineer(Jan 2021 – Dec 2023)

Company: Collaberus Technologies Pvt Ltd

• Led the team for design and development of the Dialmantra Cloud platform (dialmantra.in), a multi-tenant CCaaS product for web/Android/iOS. Developed with Asterisk, WebRTC, Django, React.JS, React Native and PostgreSQL
• Led the team to design and build Amotus (amotus.online), a screen sharing application for desktop, Android and iOS platforms using electron.js, React Native, Node.js, WebRTC and PostgreSQL
• Deployed solutions on cloud platforms like Vultr, GCP, DigitalOcean

Position: Junior Software Engineer(March 2006 – July 2007)

Company: Quadrant Infotech India Pvt Ltd

• Developed different websites for the company and its subsidiaries with HTML/CSS/PHP
• Contributed to the in-house web-based solution to manage the business using .net and MS-SQL. Developed custom AJAX modules for the web applications to support desktop applications in VB.net

Degree

• BCA, Indira Gandhi National Open University, New Delhi

Certificates:

• Foundation of Project Management, Google/Coursera
• Asterisk Certified Essentials(dCAA), Sangoma(Digium)