Job Title: Voice Engineer (Mid-level / Senior)
Location:
Hyderabad (Work from Office)
Seniority Level:
Mid-level to Senior (Individual Contributor / Tech Lead)
Experience:
Minimum 4 years (4-8+ years preferred for Senior level)
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.Our flagship products include
Tringy (IP-PBX)
,
CPaaS white-label platforms
, and
eSIM provisioning systems
, serving top telecom brands across
India, the Middle East, Africa, Europe, and North America
. We operate with an
Agile development approach
,
strong technical leadership
, and a
24/7 global support framework
.
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.
Benefits
- 10% Variable Pay (in addition to base CTC).
- Health and Accidental Insurance (company provided).
- Flexible Working Hours promoting work-life balance.
- Professional and Learning Environment with exposure to next-gen telecom systems.
- Opportunity to work under senior professionals and industry experts, fostering continuous growth and mentorship.
Skills: docker,kamailio, opensips, or rtpproxy.,voip,sip,c,debugging,linux,aws
