Voip Engineer

Quadrafort Technologies; Dadri; On-site; INR 900,000 - 1,400,000; Full time

Job summary

Quadrafort Technologies is a new-age technology partner that helps enterprises move faster and lead in an AI-driven world. We are bold, agile, and relentlessly focused on delivering speed to value through AI-powered accelerators and data-driven insights.

We are looking for a hands-on VoIP engineer to build, customise and troubleshoot the core voice stack — someone comfortable at the protocol layer, not just at the configuration level.

Qualifications

• 3+ years of hands-on Asterisk development (v11/v13/v16/v18) with experience writing or modifying custom modules.
• Solid command of SIP call flows, SDP, RTP/RTCP and Q.850 cause codes.
• Practical debugging with sngrep, Wireshark, pjsip logger and AsteriskCLI.
• MySQL working knowledge.

Responsibilities

• Develop and customise Asterisk modules and applications (C/C++), and extend existing modules for platform-specific requirements.
• Design and maintain dialplan logic, IVR flows, call routing, queues, transfers and conferencing.
• Build integrations using AGI, AMI and ARI; expose call-control APIs to application and CRM layers.
• Handle SIP signalling and RTP media flows end to end — registration, trunking, NAT traversal, codec negotiation and transcoding.
• Debug production voice issues at protocol level: one-way audio, call drops, DTMF failures, registration flaps and MOS degradation.
• Work on SBC configuration and secure signalling — SIP over TLS, SRTP, and SIP header manipulation.
• Manage telephony data in MySQL — CDRs, call logs, reporting feeds and integration tables.
• Support carrier and OEM interconnects, and assist in capacity, redundancy and failover design.
• Collaborate with the application, QA and support teams during deployments and client escalations.

Skills

Asterisk development

SIP call flows

Network debugging

MySQL knowledge

Education

B.E./B.Tech./MCA in CS/EC or related

Job description

Quadrafort Technologies is a new-age technology partner built for enterprises that want to move faster, think smarter, and lead in an AI-driven world.Unlike traditional firms shaped by legacy processes and slow execution cycles, we are the Challengers - bold, fast, and precise in everything we do. Our approach is simple: deliver speed to value by combining deep domain expertise with AI-powered accelerators, intelligent automation, and data-driven insights. We embrace agile discovery and simplified execution, powered by AI and data-driven insights to deliver faster, smarter results. This enables us to focus on rapid execution, measurable impact, and continuous innovation—helping our clients build solutions that are not just scalable, but intelligent and future-ready. At our core, Quadrafort is about challenging the status quo, for our clients, and within our own teams. We operate in a culture that values ownership, agility, and merit, where ideas move quickly and impact is visible.

We are Quadrafort - where bold thinking meets intelligent execution.

We are looking for a hands-on VoIP engineer to build, customise and troubleshoot the core voice stack — someone comfortable at the protocol layer, not just at configuration level.

KEY RESPONSIBILITIES:

• Develop and customise Asterisk modules and applications (C/C++), and extend existing modules for platform-specific requirements
• Design and maintain dialplan logic, IVR flows, call routing, queues, transfers and conferencing.
• Build integrations using AGI, AMI and ARI; expose call-control APIs to application and CRM layers.
• Handle SIP signalling and RTP media flows end to end — registration, trunking, NAT traversal, codec negotiation and transcoding.
• Debug production voice issues at protocol level: one-way audio, call drops, DTMF failures, registration flaps and MOS degradation.
• Work on SBC configuration and secure signalling — SIP over TLS, SRTP, and SIP header manipulation.
• Manage telephony data in MySQL — CDRs, call logs, reporting feeds and integration tables.
• Support carrier and OEM interconnects, and assist in capacity, redundancy and failover design.
• Collaborate with the application, QA and support teams during deployments and client escalations.

MUST-HAVE SKILLS:

• 3+ years of hands-on Asterisk development (v11 / v13 / v16 / v18); experience writing or modifying custom modules.
• Solid command of SIP call flows, SDP, RTP/RTCP and Q.850 cause codes.
• Practical debugging with sngrep, Wireshark, pjsip logger and AsteriskCLI.
• MySQL working knowledge.

GOOD-TO-HAVE:

• WebRTC, and integration with CRM platforms such as Salesforce.
• Python or Node.js for tooling and automation.
• Understanding of Indian telecom regulatory requirements — DoT OSP framework, DLT / TCCCPR, 160-series outbound norms.
• Familiarity with contact centre concepts — ACD, predictive dialling, call recording, real-time monitoring.

EDUCATION:

• B.E. / B.Tech / MCA in Computer Science, Electronics or equivalent practical experience.