Senior Telco Operations Engineer (VoIP/SMS)
Core
Manage Viber's voice and messaging infrastructure at scale, including wholesale voice/SMS operations, user activation, and anti-fraud systems.
Role type
Senior Telco Operations Engineer (VoIP/SMS)
Builds
High-availability VoIP and SMS platforms for hundreds of millions of users
Domain
Telecommunications / Voice & Messaging (via careerplan.io/jobs/04-002-81-F62-senior-telco-operations-engineer-voipsms)
Required skills
SIP protocol, SMPP/HTTP messaging, voice routing (Class 4/5 switches), network debugging (Wireshark, tcpdump), TCP/IP fundamentals, carrier interconnections, billing/rating systems, SLA-driven support
Preferred skills
Open-source/commercial VoIP platforms (OpenSIPs, FreeSWITCH), scripting (Python, Bash, Lua), AWS, Linux system administration, WebRTC, fraud detection/traffic analysis, mentoring
Technologies
OpenSIPs, FreeSWITCH, MVTS, Oracle SBC, AWS, Zendesk, JIRA, REST APIs
Responsibilities
Coordinate engineering tasks and guide junior members; Operate and maintain large-scale VoIP/SMS platforms; Provide Level II/III technical support for voice/messaging; Onboard new carrier partners; Investigate and resolve network communication issues; Drive internal infrastructure projects; Monitor and evaluate network systems; Collaborate with Commercial/Routing/Back-End teams; Contribute to process automation; Participate in anti-fraud efforts
Seniority
Senior, hands-on IC with operational leadership
