Voice Engineer

Voxvalley Technologies inc; Bengaluru; On-site; INR 800,000 - 1,200,000; Full time

Job summary

Voxvalley Technologies inc is looking for a Voice Engineer to develop and maintain high-performance VoIP applications. The ideal candidate will have at least 4 years of experience, specializing in C/C++ programming and VoIP technologies, to contribute to our innovative CPaaS platforms.

This role involves debugging, optimization, and deploying real-time voice services focusing on scalability and performance. Join us in driving digital transformation across the telecom industry.

Qualifications

• Minimum 4 years of experience in VoIP or Voice Engineering.
• Proficiency in C/C++ and Linux systems programming.
• Strong understanding of SIP, RTP/RTCP, and VoIP call flows.

Responsibilities

• Design, develop, and maintain VoIP-based voice applications.
• Debug and resolve complex voice and signaling issues.
• Integrate and optimize back-end components for real-time lookups.

Skills

C/C++ programming

VoIP technologies

Linux systems

Debugging skills

SIP/RTP/RTCP

Tools

Wireshark

Docker

Kubernetes

MySQL

Redis

Job description

Location: Hyderabad

Department: Product Engineering – Voice / CPaaS

Company Overview: Voxvalley Technologies is a global telecom software provider empowering operators, MVNOs, aggregators, and enterprises across 20+ countries. With over a decade of innovation in CPaaS, UCaaS, CCaaS, and eSIM solutions, Voxvalley delivers high-performance communication platforms that drive digital transformation.

Job Title: Voice Engineer

Job Type: Full-time

Location: Hyderabad

Experience: Minimum 4 years (4-8+ years preferred for Senior level)

Department: Product Engineering – Voice / CPaaS

About The Role

We are seeking a Voice Engineer (Mid-level to Senior) with strong expertise in C/C++ programming, VoIP technologies, and Linux systems. You will play a key role in building and optimizing our next-generation Voice Engine that powers Voxvalley’s CPaaS and Tringy platforms. This role involves end-to-end development, debugging, optimization, and deployment of real-time voice services with a focus on scalability, low-latency performance, reliability, and operational excellence. Ideal candidates will demonstrate strong systems-level skills (POSIX APIs, multithreading, socket programming), hands-on protocol knowledge (SIP, RTP/RTCP, SDP, SDP negotiation), and experience with voice codecs and real-time audio processing.

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.

Required Skills

• 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).

Good to Have

• Hands‑on experience with Kamailio, OpenSIPS, PJSIP, or RtpProxy.
• Knowledge of SBCs, NAT traversal, and STUN/TURN/ICE mechanisms.
• Exposure to WebRTC, SRTP/TLS, GStreamer or media frameworks.
• Experience with microservices architecture, Kubernetes, and CI/CD pipelines for production deployments.
• Familiarity with observability stacks (Prometheus, Grafana), and logging/alerting best practices.

Skills: voip,linux,sip