Role Overview :

We are seeking a highly skilled SIP Server Engineer/Asterisk Developer to design, configure, and maintain SIP-based communication systems. The candidate should have in-depth knowledge of Asterisk, VoIP technologies, and real-time communication protocols, with strong expertise in performance tuning, security, and integration with enterprise platforms.

Key Responsibilities :

- SIP Server Setup & Configuration: Deploy, configure, and manage SIP servers (Asterisk, FreeSWITCH, or similar PBX systems).

- WebRTC Integration: Implement WebRTC solutions for browser-based real-time communication.

- VoIP Features & Signaling: Develop and maintain SIP signaling flows, call routing, IVR, conferencing, and advanced telephony features.

- Network & Firewall Management: Configure firewalls, NAT traversal, and optimize network setups for SIP/VoIP traffic.

- SIP Event Management: Monitor, troubleshoot, and optimize SIP events, call flows, and media streams.

- Security & Compliance: Implement security mechanisms such as TLS/SRTP, anti-fraud measures, and system hardening.

- Performance Optimization: Continuously monitor server performance, debug issues, and fine-tune systems for scalability.

- Integration: Work on API-based integrations of SIP/Asterisk systems with Salesforce and other enterprise platforms.

- Monitoring & Maintenance: Use tools for real-time monitoring, logging, and analytics to ensure high availability.

Required Skills & Qualifications

- Strong experience in Asterisk PBX and other open-source SIP/VoIP platforms.

- Hands-on knowledge of SIP, RTP, WebRTC, TCP/UDP, NAT traversal, and QoS mechanisms.

- Proficiency in Linux server administration (CentOS, Ubuntu, etc.).

- Familiarity with VoIP codecs (G.711, G.729, Opus, etc.) and media handling.

- Strong understanding of network protocols (DNS, DHCP, TLS/SSL, Firewall rules).

- Experience with SIP debugging tools (Wireshark, sngrep, tcpdump).

- Programming/scripting knowledge in Python, Bash, or C for automation and customization.

- Good understanding of real-time communication security standards.

- Prior experience integrating with CRM/enterprise applications is a plus.

Preferred Qualifications :

- Experience with FreeSWITCH, Kamailio/OpenSIPS, or similar SIP servers.

- Knowledge of cloud telephony platforms (Twilio, Plivo, etc.).

- Exposure to Salesforce integrations.

- Familiarity with containerized deployments (Docker, Kubernetes).