Dialer Engineer/SIP Engineer

Responsibilities

• Design and implement scalable cloud-based inbound and outbound dialer architecture using Asterisk and Kamailio/OpenSIPS
• Lead end-to-end setup of dialer systems including IVR, predictive/auto/manual dialing modes, and queue management
• Configure and troubleshoot SIP trunks, SBCs, media gateways, and NAT traversal issues
• Own cloud deployment of dialer systems using AWS, GCP, or Azure with containerization
• Ensure compliance with standards like DND, TRAI/DoT, and TCPA
• Integrate telephony platforms like Twilio or Exotel with CRM systems via APIs
• Perform in-depth debugging of call failures using PCAP traces and SIP logs

Requirements

• 6+ years of hands-on experience with Asterisk, Kamailio/OpenSIPS, or FreeSWITCH
• Deep knowledge of SIP protocol, RTP, WebRTC, STUN/TURN, and NAT issues
• Experience designing and deploying large-scale dialer systems on cloud infrastructure
• Solid experience in Linux system administration and shell scripting
• Familiarity with SBCs and SIP debuggers like sngrep or Wireshark
• Exposure to call center metrics, DNC lists, and concurrency management

Preferred Qualifications

• Bachelor’s or Master’s degree in Computer Science or Electronics
• VoIP certifications such as dCAP or CCVP
• Experience with REST APIs, MySQL/Postgres, and RabbitMQ/Kafka
• Experience in fintech, edtech, or BPO-focused tech environments

About the Company

Credgenics provides scalable communication infrastructure and telephony backbones for high-growth products.