Credgenics- Dialer Engineer/SIP Engineer

About the Role We are looking for an experienced Dialer Engineer / SIP Engineer 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 ● 6+ 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 ● Bachelor's or Master's 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. Why Join Us? ● Opportunity to own and shape the telephony backbone of a high-growth product. ● Work with a team that values autonomy, innovation, and deep technical ownership. ● Be part of solving real business challenges through scalable communication infrastructure.