We are looking for an experienced VoIP Developer who has deep expertise in setting up and scaling VoIP-based contact center solutions using Asterisk or similar technologies. The ideal candidate should have hands-on experience in building inbound and outbound dialer systems from the ground up, with a strong grasp of SIP protocol, cloud infrastructure, and telephony integration best practices.
Key Responsibilities :
Dialer Setup & Architecture :
– Design and implement scalable cloud-based inbound and outbound dialer architecture using Asterisk, Kamailio/OpenSIPS, and related tools.
– Lead the end-to-end setup of dialer systems including IVR, predictive/auto/manual dialing
modes, and queue management.
SIP & Telephony :
– Deep understanding of SIP protocol, RTP, and VoIP call flows.
– Configure and troubleshoot SIP trunks, SBCs, media gateways, and NAT traversal issues.
– Optimize call routing, codec negotiation, DTMF handling, and failover.
System Engineering :
– Own the cloud deployment of dialer systems (AWS, GCP, or Azure) using containerization (Docker/Kubernetes preferred).
– Ensure high availability, performance monitoring, logging, and disaster recovery for dialer infrastructure.
– Collaborate with network and DevOps teams to fine-tune VoIP performance and reliability.
Compliance & Quality :
– Ensure the dialer adheres to compliance standards like DND, TRAI/DoT (India), TCPA (US), etc.
– Implement call recording, real-time monitoring, and post-call analytics systems.
Development & Integration :
– Work closely with backend and frontend developers to expose dialer APIs for CRM/agent dashboards.
– Integrate with third-party telephony platforms (Tata, Airtel, Twilio, Exotel, etc.) and CRM systems.
Troubleshooting & RCA :
– Perform in-depth debugging of call failures using PCAP traces, SIP logs, and Asterisk CLI.
– Provide root cause analysis and implement permanent fixes for recurring issues.
Requirements :
– 5+ years of hands-on experience with Asterisk, Kamailio/OpenSIPS, FreeSWITCH, or similar
VoIP systems.
– Deep knowledge of SIP protocol, RTP, WebRTC, STUN/TURN, and NAT-related issues.
– Experience designing and deploying large-scale dialer systems on cloud infrastructure.
– Solid experience in Linux system administration and shell scripting.
– Familiarity with SBCs (e.g., Acme Packet, Sansay, Audiocodes) and SIP debuggers (sngrep,
Wireshark).
– Exposure to call center metrics, DNC lists, retry logic, concurrency management.
– Experience with REST APIs, MySQL/Postgres, and message queues (RabbitMQ/Kafka) is a plus.
– Bonus : Experience with voice biometrics, conversational IVR, AI-based call scoring.
Preferred Qualifications :
– Bachelors or Masters degree in Computer Science, Electronics, or a related field.
– VoIP certifications (dCAP, CCVP, etc.) are a plus.
– Prior experience working in fintech, edtech, or BPO-focused tech environments.
Are you interested in this position?
Apply by clicking on the “Apply Now” button below!
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