🎧 Senior VoIP Engineer

Synergy Beam Solutions is at the forefront of IT and cybersecurity, currently building a state-of-the-art telecommunications platform designed for high-performance call centers worldwide. 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:

You will lead the design and maintenance of mission-critical, real-time voice systems. Your focus will be 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.

⚙️ Technical Requirements:

Experience: 6+ years in software engineering, with a minimum of 4 years dedicated to VoIP/SIP development.

• Core Platforms: Deep, hands-on experience with core VoIP infrastructure components, specifically Freeswitch and Kamailio.


• Programming: Proficiency in scripting and development with Lua and Python. (Experience with Go or C/C++ is a significant plus).


• Networking Expertise: Expert-level command of network protocols and advanced debugging tools (Wireshark, SIPp, libpcap, Linux/BSD sockets).


• Cloud & WebRTC: Practical experience with WebRTC, configuring and managing TURN/STUN servers, and deploying solutions on major cloud platforms (AWS, Google Cloud, Cloudflare).


• Hardware Familiarity: Understanding of traditional telecom hardware, including GSM, E1 gateways, and serial-connected devices.


• Scalability: 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.