Senior Telco Operations Engineer – VoIP/SMS

Rakuten Viber

Senior Telco Operations Engineer maintaining Viber’s large-scale VoIP and SMS infrastructure in Warsaw. Leading operations, carrier onboarding, technical escalations, automation, and anti-fraud initiatives.

Posted 8/11/2026full-timeWarsaw • 🇵🇱 PolandSeniorWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in VoIP and SMS operations, with strong capabilities in technical support, network systems evaluation, and partner onboarding. Proficient in cloud environments and automation of operational workflows, while effectively communicating across teams.

Highest-signal resume keywords

VoIP/SMS OperationsSIP KnowledgeTechnical SupportPython ProficiencyCloud Environment Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

VoIP OperationsSIPSMPP/HTTP MessagingVoice RoutingTCP/IPLinux System AdministrationREST APIsTraffic AnalysisProcess AutomationCarrier Interconnections

Soft Skills

Excellent Communication SkillsInterpersonal SkillsCross-Functional CollaborationMentoringProblem-Solving

Tools & Technologies

WiresharkTcpdumpOpenSIPSFreeSWITCHAWSZendeskJIRAOracle SBCMVTSWebRTC

Industry Keywords

Telecom EngineeringCall QualitySMS DeliveryNetwork SystemsFraud DetectionTraffic Pattern AnalysisSLA AwarenessBilling SystemsCapacity ManagementTrunk Setup

Tech Stack

Tools & technologies

AWSCloudFirewallsLinuxLuaOraclePythonTCP/IPVoIP

About the role

Key responsibilities & impact

Coordinate engineering tasks, guide junior team members, own escalation decisions, and represent the team in partner-facing communication
Operate and maintain large-scale VoIP and SMS platforms in a cloud environment
Provide Level II and Level III technical support for voice and messaging services
Onboard new carrier partners by configuring trunks, accounts, and routing
Investigate and resolve call quality, SMS delivery, routing, and protocol issues
Drive infrastructure projects including platform upgrades, legacy system decommissioning, CDR integration, and process automation
Monitor, test, and evaluate network systems and recommend improvements
Collaborate with Commercial, Routing, and Back-End teams on platform changes
Improve and automate operational workflows
Participate in anti-fraud and anti-spam efforts through traffic pattern analysis

Requirements

What you’ll need

3+ years of hands-on experience in VoIP/SMS operations or telecom engineering
Strong knowledge of SIP, SMPP/HTTP messaging, and voice routing using Class 4/5 switches
Experience with Wireshark, tcpdump, and SIP trace analysis
Understanding of TCP/IP and networking fundamentals, including switches, firewalls, routers, LAN/WAN/VPN
Experience with carrier interconnections, trunk setup, capacity management, and partner onboarding
Familiarity with voice/SMS billing and rating systems
Ability to work in a ticket-driven support environment with SLA awareness
Excellent written and verbal communication skills in English
Strong interpersonal and cross-functional communication skills
Experience with OpenSIPS, FreeSWITCH, MVTS, Oracle SBC, or similar VoIP platforms
Proficiency in Python, Bash, or Lua
Experience with AWS or other cloud environments
Linux system administration experience
Familiarity with WebRTC
Experience with Zendesk or JIRA
Background in telecom fraud detection or traffic analysis
Experience leading or mentoring junior engineers
Working knowledge of REST APIs and integration workflows

Benefits

Comp & perks

🌐 Worldwide ❌ Jobs You've Hidden ⭐️ Saved Jobs ✅ Applied Jobs ✉️ Email Alerts 👤 Account Rakuten Viber Website LinkedIn All Job Openings 201 - 500 employees Founded 2010 💼 Consulting 📣 Marketing 🛍️ eCommerce Consulting
Marketing
eCommerce Rakuten Viber is a communication platform that offers a variety of tools for businesses to connect with their customers, providing solutions like Viber Verification and SecurePlus Messages for enhanced security. It allows brands to set up engaging campaigns and build emotional connections with users through its super app features. With a global audience utilizing the platform for daily interactions, Rakuten Viber facilitates personal brand-to-consumer connections, driving marketing success and customer loyalty. Senior Telco Operations Engineer – VoIP/SMS Job not on LinkedIn 🔥 1 minute ago 🏢 Warsaw – Onsite ⏰ Full Time 🟠 Senior ⚙️ Operations Apply Now Customize resume + cover letter Report problem ☆ Save ☑️ Mark as applied ❌ Hide 📋 Description
Coordinate engineering tasks, guide junior team members, own escalation decisions, and represent the team in partner-facing communication
Operate and maintain large-scale VoIP and SMS platforms in a cloud environment
Provide Level II and Level III technical support for voice and messaging services
Onboard new carrier partners by configuring trunks, accounts, and routing
Investigate and resolve call quality, SMS delivery, routing, and protocol issues
Drive infrastructure projects including platform upgrades, legacy system decommissioning, CDR integration, and process automation
Monitor, test, and evaluate network systems and recommend improvements
Collaborate with Commercial, Routing, and Back-End teams on platform changes
Improve and automate operational workflows
Participate in anti-fraud and anti-spam efforts through traffic pattern analysis 🎯 Requirements
3+ years of hands-on experience in VoIP/SMS operations or telecom engineering
Strong knowledge of SIP, SMPP/HTTP messaging, and voice routing using Class 4/5 switches
Experience with Wireshark, tcpdump, and SIP trace analysis
Understanding of TCP/IP and networking fundamentals, including switches, firewalls, routers, LAN/WAN/VPN
Experience with carrier interconnections, trunk setup, capacity management, and partner onboarding
Familiarity with voice/SMS billing and rating systems
Ability to work in a ticket-driven support environment with SLA awareness
Excellent written and verbal communication skills in English
Strong interpersonal and cross-functional communication skills
Experience with OpenSIPS, FreeSWITCH, MVTS, Oracle SBC, or similar VoIP platforms
Proficiency in Python, Bash, or Lua
Experience with AWS or other cloud environments
Linux system administration experience
Familiarity with WebRTC
Experience with Zendesk or JIRA
Background in telecom fraud detection or traffic analysis
Experience leading or mentoring junior engineers
Working knowledge of REST APIs and integration workflows Apply Now 📊 Check your resume score for this job Improve your chances of getting an interview by checking your resume score before you apply. Check Resume Score Similar Jobs Workplace Operations 🕒 July 29 ElevenLabs 1 - 10 🤖 Artificial Intelligence 📱 Media Website LinkedIn All Job Openings Workplace Operations lead managing logistics and culture for ElevenLabs’ Warsaw office. Engaging with staff and ensuring smooth daily operations in a fast-paced AI environment. 🏢 Warsaw – Onsite 💰 $19M Series A on 2023-06 ⏰ Full Time 🟡 Mid-level 🟠 Senior ⚙️ Operations Lead IT Expert, Operational Excellence 🕒 June 26 DSV - Global Transport and Logistics 10,000+ employees 🚘 Automotive 🏥 Healthcare 💼 Consulting Website LinkedIn All Job Openings Lead IT Expert managing service performance in Incident Management and improvements. Fostering collaboration and process optimization within Contract Logistics IT. 🏢 Warsaw – Onsite ⏰ Full Time 🟠 Senior ⚙️ Operations EV Charging Operations Specialist – M/F/D 🕒 June 24 DSV - Global Transport and Logistics 10,000+ employees 🚘 Automotive 🏥 Healthcare 💼 Consulting Website LinkedIn All Job Openings Operations Specialist overseeing EV charging infrastructure for DSV Energy. Monitoring performance, managing incidents, and supporting projects across global locations. 🏢 Warsaw – Onsite ⏰ Full Time 🟡 Mid-level 🟠 Senior ⚙️ Operations View More Operations Jobs 🌐 Worldwide Built by Lior Neu-ner. I'd love to hear your feedback — Get in touch via DM or support@remoterocketship.com Search Search Jobs by country Search jobs by city Search jobs by job title Search entry-level jobs Search junior-level jobs Search senior-level jobs Search jobs by tech stack Search jobs by contract type Search remote internships Search remote part-time jobs Remote jobs Anywhere in the World Companies Hiring Anywhere in the World Companies Hiring Sales People Anywhere in the World Companies Hiring Software Engineers Anywhere in the World Resources Advice Tips for finding remote jobs Interview questions and answers Resume examples Cover letter examples Post a job Affiliates About us Is Remote Rocketship legit? Privacy policy Terms of service Job board SEO course Remote Job Search MasterClass AI Apply Copilot OpenClaw job finder Find jobs using your resume Jobs by Country Remote jobs anywhere in the world (Worldwide remote jobs) Remote jobs United States Remote jobs Australia Remote jobs Brazil Remote jobs Canada Remote jobs France Remote jobs Ireland Remote jobs Germany Remote jobs Netherlands Remote jobs Spain Remote jobs UK Popular Jobs Remote data analyst jobs Remote customer support jobs Remote executive assistant jobs Remote marketing jobs Remote product designer jobs Remote product manager jobs Remote project manager jobs Remote recruiter jobs Remote sales jobs Remote software engineer jobs Jobs by Type Remote full-time jobs Remote part-time jobs Remote contract jobs Remote internship jobs Remote entry-level jobs Remote jobs with no experience required Remote junior jobs (1-3 years of experience) Digital nomad jobs Remote jobs with no degree required Freelance remote jobs Temporary remote jobs Remote jobs hiring now Stay at home mom jobs