Technology, Information and Internet

Synergy Beam

11-50

Work fully remotely, from home or anywhere agreed.

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🎧 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.
<h2>Tasks</h2>
🎯 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 &amp; Optimize: Design, develop, and maintain high-performance SIP and RTP-based VoIP systems, serving as the subject matter expert on core VoIP protocols.
<ul>
<li>Deep Troubleshooting: Utilize expert-level skills to diagnose and resolve complex routing, codec, and signaling issues using packet captures (Wireshark), logs, and SIP traces.</li>
<li>Protocol &amp; Network Tuning: Proactively optimize network performance across critical protocols (SIP, RTP, TCP/IP, DNS, NAT, and firewall rules).</li>
<li>Ecosystem Integration: Integrate, support, and ensure seamless interoperability between PBX systems, SBCs, and modern cloud VoIP environments.</li>
<li>Quality Assurance: Define, monitor, and aggressively improve call quality metrics (MOS, jitter, latency) through proactive performance tuning.</li>
<li>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.</li>
<li>Escalation Point: Act as the final point of technical escalation for intricate VoIP incidents, effectively coordinating with internal teams and external vendors.</li>
</ul>
<h2>Requirements</h2>
⚙️ Technical Requirements:
Experience: 6+ years in software engineering, with a minimum of 4 years dedicated to VoIP/SIP development.
<ul>
<li>Core Platforms: Deep, hands-on experience with core VoIP infrastructure components, specifically Freeswitch and Kamailio.</li>
<li>Programming: Proficiency in scripting and development with Lua and Python. (Experience with Go or C/C++ is a significant plus).</li>
<li>Networking Expertise: Expert-level command of network protocols and advanced debugging tools (Wireshark, SIPp, libpcap, Linux/BSD sockets).</li>
<li>Cloud &amp; WebRTC: Practical experience with WebRTC, configuring and managing TURN/STUN servers, and deploying solutions on major cloud platforms (AWS, Google Cloud, Cloudflare).</li>
<li>Hardware Familiarity: Understanding of traditional telecom hardware, including GSM, E1 gateways, and serial-connected devices.</li>
<li>Scalability: Proven track record in building highly scalable systems and implementing effective automated testing frameworks.</li>
</ul>
Desired Skills (Nice-to-Have):
Hands-on knowledge of call flow simulation tools and SIP testing frameworks.
<ul>
<li>Experience designing and implementing RESTful APIs and scalable microservices.</li>
<li>Familiarity with global network routing principles and optimization techniques.</li>
<li>Experience with embedded systems or SIP hardware devices.</li>
<li>Background in implementing AI/ML-driven features within VoIP solutions.</li>
</ul>

Senior VoIP Engineer

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