Senior VoIP Engineer

🎧 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.

## Tasks

🎯 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.

## Requirements

⚙️ 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.