Synergy Beam

Role Description We are seeking a Senior VoIP Engineer to be a foundational member of our engineering team, driving the architecture, scaling, and reliability of our core SIP-based SaaS platform. Join us if you are passionate about tackling complex challenges and redefining communication and emergency systems globally. Your Impact - Lead the design and maintenance of mission-critical, real-time voice systems. - Focus on ensuring unparalleled reliability, scalability, and security while enhancing voice quality and observability across our global cloud infrastructure. Key Responsibilities - Architect & Optimize: Design, develop, and maintain high-performance SIP and RTP-based VoIP systems, serving as the subject matter expert on core VoIP protocols. - Deep Troubleshooting: Utilize expert-level skills to diagnose and resolve complex routing, codec, and signaling issues using packet captures (Wireshark), logs, and SIP traces. - Protocol & Network Tuning: Proactively optimize network performance across critical protocols (SIP, RTP, TCP/IP, DNS, NAT, and firewall rules). - Ecosystem Integration: Integrate, support, and ensure seamless interoperability between PBX systems, SBCs, and modern cloud VoIP environments. - Quality Assurance: Define, monitor, and aggressively improve call quality metrics (MOS, jitter, latency) through proactive performance tuning. - Feature Leadership: Lead the technical architecture and deployment of advanced voice applications, including real-time transcription, AMD/VMD (Answering Machine Detection), and next-generation AI-driven voice features. - Escalation Point: Act as the final point of technical escalation for intricate VoIP incidents, effectively coordinating with internal teams and external vendors. Qualifications - 6+ years in software engineering, with a minimum of 4 years dedicated to VoIP/SIP development. - Deep, hands-on experience with core VoIP infrastructure components, specifically Freeswitch and Kamailio. - Proficiency in scripting and development with Lua and Python. (Experience with Go or C/C++ is a significant plus). - Expert-level command of network protocols and advanced debugging tools (Wireshark, SIPp, libpcap, Linux/BSD sockets). - Practical experience with WebRTC, configuring and managing TURN/STUN servers, and deploying solutions on major cloud platforms (AWS, Google Cloud, Cloudflare). - Understanding of traditional telecom hardware, including GSM, E1 gateways, and serial-connected devices. - Proven track record in building highly scalable systems and implementing effective automated testing frameworks. Desired Skills (Nice-to-Have) - Hands-on knowledge of call flow simulation tools and SIP testing frameworks. - Experience designing and implementing RESTful APIs and scalable microservices. - Familiarity with global network routing principles and optimization techniques. - Experience with embedded systems or SIP hardware devices. - Background in implementing AI/ML-driven features within VoIP solutions.