We are looking for an experienced IMS / Kamailio Developer with strong expertise in SIP-based communication systems, VoIP technologies, and IP Multimedia Subsystem (IMS). The candidate will be responsible for developing, configuring, integrating, and troubleshooting SIP servers and telecom signaling solutions using Kamailio.

Key Responsibilities

- Design, develop, configure, and maintain Kamailio SIP server solutions.

- Work on IMS architecture, SIP signaling, and VoIP communication systems.

- Develop and customize SIP routing logic and Kamailio configuration scripts.

- Troubleshoot SIP call flows, signaling issues, registration, and call setup failures.

- Integrate Kamailio with application servers, databases, and other telecom network components.

- Work with Linux environments and networking protocols.

- Analyze logs, perform debugging, and resolve production issues.

- Collaborate with telecom architects, developers, and testing teams.

- Support performance tuning, high availability, and scalability of SIP infrastructure.





- Prepare technical documentation and participate in code reviews.

Mandatory Skills

- Solid hands-on experience with Kamailio SIP Server.

- Good understanding of IMS (IP Multimedia Subsystem) architecture.

- Strong knowledge of SIP signaling and call flows.

- Experience with VoIP and telecom signaling protocols.

- Proficiency in Linux/Unix environments.

- Knowledge of TCP/IP, UDP, DNS, and networking fundamentals.

- Experience in troubleshooting SIP registration, routing, and call setup issues.

Good-to-Have Skills

- Experience with OpenSIPS, Asterisk, or FreeSWITCH.

- Knowledge of Diameter, RTP/RTCP, SDP, and ENUM.

- Experience with C/C++ programming and scripting.

- Knowledge of MySQL/PostgreSQL database integration.

- Exposure to 4G/5G IMS, VoLTE, or VoWiFi.

- Experience with Docker, Kubernetes, and telecom cloud deployments.

- Understanding of SIP security, TLS, and IPsec.

📌 IMS Kamalio developer (Bengaluru)
🏢 Infosys APAC
📍 Bengaluru