OpenSIPS​/SIP Protocol Engineer

OpenSIPS/SIP Protocol Engineer – other area(s), Flowood Direct Hire Jun 19, 2025

We are a growing technology company specializing in telecommunications and unified communications solutions. Our infrastructure supports critical business communications for customers and resellers across multiple platforms and technologies.

We are seeking an experienced OpenSIPS/SIP Protocol Engineer to join our Level 3 technical support team. This role combines deep technical expertise in SIP protocols and OpenSIPS with customer‑facing support responsibilities. You’ll work directly with customers, resellers, and internal development teams to resolve complex telecommunications issues and optimize our VoIP infrastructure.

Configure, deploy, and maintain OpenSIPS proxy servers and load balancers

Design and implement SIP call routing logic and traffic management policies

Troubleshoot complex SIP protocol issues using packet analysis tools

Optimize call flow performance and resolve carrier integration challenges

Develop custom OpenSIPS scripts and modules for specific business requirements

Monitor SIP traffic patterns and implement proactive performance improvements

Provide Level 3 technical support for complex SIP‑related issues

Collaborate with customers and resellers to diagnose and resolve call quality problems

Create technical documentation and troubleshooting guides

Conduct technical training sessions for customers and internal teams

Escalate and coordinate with vendors when necessary

Work with Dev Ops teams to provision and scale SIP infrastructure

Implement monitoring and alerting for SIP services

Participate in incident response and root cause analysis

Contribute to disaster recovery and business continuity planning

Support carrier integration projects and SIP trunk optimization

3+ years of hands‑on OpenSIPS experience – configuration, scripting, and administration

Expert‑level SIP protocol knowledge – RFC 3261 and related standards

Network packet analysis – Wireshark, tcpdump, and SIP trace interpretation

Linux system administration – command line proficiency and system troubleshooting

Call routing and load balancing – designing scalable SIP proxy architectures

Telecom protocols – RTP, RTCP, SDP, and related VoIP technologies

SIP trunk integration with multiple providers

Performance tuning and capacity planning for VoIP systems

Experience with SIP debugging tools and methodologies

Strong problem‑solving and analytical thinking

Excellent written and verbal communication skills

Customer service orientation with technical depth

Ability to work independently and as part of a team

Documentation and knowledge sharing capabilities

Experience with other SIP proxy solutions (Kamailio, Free SWITCH)

Knowledge of telecommunications standards and regulations

Scripting skills (Python, Bash, or similar)

Cloud platform experience (AWS, Azure)

Experience with VoIP monitoring tools (Homer, SIPSAK)

Understanding of network security principles for VoIP

Previous Level 3 or escalation support experience