Voice Engineer(Programmer)

As a Voice Engineer at Voxvalley Technologies, you will be responsible for designing, developing, and maintaining VoIP-based voice applications and services with a strong focus on reliability and performance. Your role will involve developing high-performance components in C/C++ on Linux for low-latency voice processing, including multithreaded and real-time code. You will also be required to implement and troubleshoot SIP, RTP/RTCP, and voice codec flows, debug complex voice, signaling, and media issues, integrate back-end components, and manage deployments and observability using various tools and technologies. **Key Responsibilities:** - Design, develop, and maintain VoIP-based voice applications and services with a focus on reliability and performance. - Develop high-performance components in C/C++ on Linux for low-latency voice processing, including multithreaded and real-time code. - Implement and troubleshoot SIP, RTP/RTCP, and voice codec flows (G.711, G.729, Opus, etc.), including SDP and NAT traversal handling. - Debug and resolve complex voice, signaling, and media issues across multiple layers using tools like Wireshark, tcpdump, gdb, strace, perf, and valgrind. - Integrate and optimize back-end components such as MySQL and Redis for state, call metadata and real-time lookups. - Manage deployments and observability using AWS, Docker, container orchestration (Kubernetes preferred), and CI/CD pipelines. - Collaborate closely with Product, QA, DevOps, and Support teams to ensure stable releases, runbooks, and 24/7 operational readiness. - For Senior-level candidates: lead design reviews, mentor junior engineers, drive technical decisions, and take ownership of major modules and performance goals. - (Optional) Configure and manage Kamailio, OpenSIPS and RtpProxy for SIP routing and media handling; tune SBCs and NAT traversal mechanisms. **Qualifications Required:** - Minimum 4 years of experience in VoIP or Voice Engineering; 4-6 years typical for Mid-level, 6+ years preferred for Senior. - Proficiency in C/C++ and Linux systems programming (POSIX APIs, pthreads, real-time scheduling). - Strong understanding of SIP, RTP/RTCP, SDP, and VoIP call flows, including SIP trunking and session negotiation. - Experience with voice codecs such as G.711, G.729, Opus and real-time audio processing. - Hands-on experience with MySQL, Redis and service design for low-latency access. - Familiarity with cloud and container tooling: AWS, Docker, Kubernetes, and Git. - Excellent debugging, profiling, performance tuning, and problem-solving skills; comfortable with observability and load-testing. - Experience with network fundamentals (TCP/UDP, NAT, STUN/TURN/ICE) and troubleshooting tools (Wireshark, tcpdump). The company, Voxvalley Technologies, is a global telecom software provider that empowers operators, MVNOs, aggregators, and enterprises across 20+ countries. With a strong focus on innovation in CPaaS, UCaaS, CCaaS, and eSIM solutions, Voxvalley delivers high-performance communication platforms that drive digital transformation. Operating with an Agile development approach, strong technical leadership, and a 24/7 global support framework, Voxvalley is committed to providing cutting-edge solutions to its clients. (Note: Additional details about the company have been included for context and understanding.) As a Voice Engineer at Voxvalley Technologies, you will be responsible for designing, developing, and maintaining VoIP-based voice applications and services with a strong focus on reliability and performance. Your role will involve developing high-performance components in C/C++ on Linux for low-latency voice processing, including multithreaded and real-time code. You will also be required to implement and troubleshoot SIP, RTP/RTCP, and voice codec flows, debug complex voice, signaling, and media issues, integrate back-end components, and manage deployments and observability using various tools and technologies. **Key Responsibilities:** - Design, develop, and maintain VoIP-based voice applications and services with a focus on reliability and performance. - Develop high-performance components in C/C++ on Linux for low-latency voice processing, including multithreaded and real-time code. - Implement and troubleshoot SIP, RTP/RTCP, and voice codec flows (G.711, G.729, Opus, etc.), including SDP and NAT traversal handling. - Debug and resolve complex voice, signaling, and media issues across multiple layers using tools like Wireshark, tcpdump, gdb, strace, perf, and valgrind. - Integrate and optimize back-end components such as MySQL and Redis for state, call metadata and real-time lookups. - Manage deployments and observability using AWS, Docker, container orchestration (Kubernetes preferred), and CI/CD pipelines. - Collaborate closely with Product, QA, DevOps, and Support teams to ensure stable releases, runbooks, and 24/7 operational readiness. - For Senior-level candidates: lead design reviews, mentor ju