Junior System Administrator (VoIP/Telephony) / Telephony Engineer at Telebu Communications · Madhupur, Hyderabad · 2 - 3 years · ₹4L - ₹5L / yr · Bootstrapped · Posted 21 Aug 2025
Junior System Administrator (VoIP/Telephony) / Telephony Engineer
Junior System Administrator (VoIP/Telephony) / Telephony Engineer (Telecommunications)
No. of Positions - 1
We are looking for a Junior System Administrator (VoIP) / Telephony Engineer (Telecommunications) to join our Telebu's Communications engineering Team. The Telebuin will develop, implement and support IP Telephony related technologies including and not limited to IP Telephony, IVR platforms, Conferencing solutions, Voice engineering integration, Voice over IP (VoIP), Session Border Controllers (SBC), Session Initiation Protocol (SIP), WebRTC, and Public Switched Telephone Network (PSTN) gateways.
Responsibilities:
- Install & maintain Freeswtich and other SIP servers.
- Administration of SIP and Media Servers, Network/Protocol level debugging and testing, Contact center solutions, Troubleshoots and resolves complex problems.
- Provide IP Telephony and VoIP Subject Matter Expertise for Company and Company's managed service providers, manages 3rd party telecom carriers and providers.
Requirements:
- 3 years of hands-on industry experience in telecommunications
- Strong conceptualize knowledge and experience with telephony protocols like SIP, SDP, RTP, SRTP and audio/video codecs.
- In-depth working experience with Kamailio, Freeswitch, Any of the SIP stack (Sofia, reSIProcate, PJSIP, etc.), and Linux
- Experience in using the VoIP testing tools like Wireshark, VoIPMonitor, SIPp, SIPCapture, Homer etc.
- Strong understanding of implementing various network setups (Private VPNs, multi-zone secure connectivity etc)
Nice to have:
- Experience with virtualization/container related technologies (Xen, VMware vSphere / ESXi, Docker, Kubernetes)
- Hands on writing production quality code using any of the scripting languages like Python, Go, Erlang etc.
- Working knowledge in any NoSQL databases like MongoDB, Redis, Cassandra etc.
- Passionate about knowing everything about VoIP Protocol standards & related RFCs
Shubham Vishwakarma
Full Stack Developer - Averlon
About Telebu Communications
About
Company social profiles
Similar jobs (2)
WE ARE HIRING | PROJECT MANAGER – VOIP TECHNOLOGIES
Position: Project Manager
Industry: IT Services / VoIP Technologies
Experience: 6–12 Years
Location: Ahmedabad | Work from Office
We are looking for a Technical Project Manager with a strong hands-on technical background in VoIP Development
.
KEY RESPONSIBILITIES
• Manage end-to-end VoIP implementation projects from initiation through deployment and post-implementation support.
• Gather business and technical requirements and translate them into actionable project plans.
• Prepare project schedules, milestones and resource allocation plans.
• Coordinate with Development, QA, DevOps, Support and Infrastructure teams.
• Track project progress and ensure timely delivery.
• Conduct project kickoffs, status meetings and client review meetings.
• Identify project risks and develop mitigation strategies.
• Manage scope changes and maintain project documentation, reports and dashboards.
• Coordinate UAT and production rollout.
• Manage timelines, budgets and resource utilisation.
• Communicate project status to clients and internal stakeholders.
• Support pre-sales through effort estimation and project planning.
MANDATORY TECHNICAL EXPERIENCE
Hands-on experience in VoIP/Telecom with strong knowledge of:
• FreeSWITCH
• Asterisk
• Kamailio
• OpenSIPS
• SIP
• RTP
• WebRTC
• SBC
• IP Telephony
• Linux
• TCP/IP, NAT, Firewalls and Networking
ADDITIONAL SKILLS
• Agile / Scrum methodologies
• Project planning and scheduling
• Risk and resource management
• Client and stakeholder management
• UAT and production deployment
• Vendor coordination
• International client handling
• AWS / Azure / GCP exposure is an advantage
• REST API integration knowledge is an advantage
• PMP / PRINCE2 / CSM certification preferred
Key Responsibilities
- Design, configure, administer, and troubleshoot Cisco Voice and Collaboration environments.
- Hands-on experience with Cisco CUCM (Call Manager) administration, configuration, upgrades, and troubleshooting.
- Manage and support Cisco Unity Connection for voicemail and unified messaging.
- Configure and troubleshoot Ribbon SBC / PSX for SIP signaling, call routing, and voice connectivity.
- Troubleshoot SIP, RTP, TCP/IP, DNS, and voice call-flow issues.
- Configure and maintain Cisco IP Phones, gateways, trunks, dial plans, route patterns, translation patterns, and partitions/CSS.
- Monitor voice infrastructure and resolve incidents, service requests, and performance issues.
- Perform voice platform upgrades, patching, migrations, and production changes.
- Work with network, security, and application teams to resolve complex voice and connectivity issues.
- Maintain technical documentation, configuration standards, and operational procedures.
Required Skills
- Strong experience in Cisco Voice / Collaboration technologies.
- Cisco CUCM – Administration and troubleshooting.
- Cisco Unity Connection – Administration and troubleshooting.
- Ribbon SBC / PSX – Configuration and troubleshooting.
- Strong knowledge of SIP, RTP, VoIP, TCP/IP, DNS, and networking fundamentals.
- Experience with SIP Trunks, dial plans, gateways, route patterns, and call routing.
- Good troubleshooting and incident management skills.
- Exposure to monitoring tools and ITIL-based support processes is an added advantage.
Follow CutshortShubham Vishwakarma
Full Stack Developer - Averlon