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 / VoIP / SMS
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, ticket-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 (via careerplan.io/jobs/04-002-81-F62-43-20F-senior-telco-operations-engineer-voipsms)
Technologies
OpenSIPs, FreeSWITCH, MVTS, Oracle SBC, Wireshark, tcpdump, Zendesk, JIRA, AWS, REST APIs
Responsibilities
Coordinate engineering tasks and guide junior members, operate/maintain large-scale VoIP/SMS platforms, provide Level II/III technical support, onboard new carrier partners, investigate and resolve network communication issues, drive internal infrastructure projects, monitor and evaluate network systems, collaborate on platform changes, contribute to process automation, participate in anti-fraud efforts
Seniority
Senior, hands-on IC with operational leadership
