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Senior Network Support Voice Engineer

Your Role

As a Senior VoIP Engineer, you will play a key role in designing, optimizing, and supporting carrier‑grade SIP and VoIP infrastructure. You will serve as the highest-level technical escalation point for complex SIP signaling, media issues, and interoperability challenges across multi‑carrier environments. Your expertise will ensure reliable, secure, and high‑quality voice services for our global platforms.

In this role, you will:

  • Conduct detailed interoperability testing between carriers, SBCs, softswitches, and SIP platforms.
  • Design, configure, and maintain SIP trunking solutions with multiple carriers.
  • Troubleshoot advanced SIP/RTP incidents including one‑way audio, call failures, and signaling mismatches.
  • Capture, review, and analyze SIP call flows and media streams using tools like Wireshark, SIPp, sngrep, HEPIC/Homer, and Empirix.
  • Collaborate with network and security teams to integrate SIP services across diverse network environments.
  • Work closely with vendors and carriers to validate configurations, resolve escalations, and ensure end‑to‑end service functionality.
  • Develop and maintain comprehensive documentation such as call flow diagrams, interconnect standards, and troubleshooting guides.
  • Mentor junior engineers and operations staff on SIP protocols, diagnostics, and best practices.

Your Profile

7+ years of hands‑on VoIP engineering experience, with strong expertise in SIP trunking and carrier interoperability.Deep understanding of SIP signaling (INVITE, BYE, REGISTER, re‑INVITE, UPDATE, PRACK, REFER, etc.), SDP, RTP/RTCP.Proven experience troubleshooting complex SIP interoperability issues across carriers and SBC vendors.Hands‑on experience with SBCs and SIP proxies (Ribbon, AudioCodes, Oracle/Acme Packet, OpenSIPS, Kamailio, etc.).Strong proficiency with packet-analysis and SIP diagnostics tools (Wireshark, sngrep, SIPp, Homer/HEP, Empirix).Solid networking knowledge: IP, DNS, subnetting, VLANs, routing.Comfortable working in Linux environments for VoIP platforms.Excellent communication and documentation skills.
Preferred:Experience with ENUM, LNP, routing databases, or SS7–SIP interworking.Knowledge of SIP security (TLS, SRTP) and regulatory standards such as STIR/SHAKEN, E911, LI.Exposure to softswitch architectures and VoIP core systems.Scripting skills (Python, Bash, Ansible).Relevant industry certifications (SSCA®, Ribbon, AudioCodes, Oracle/Acme Packet)

What You’ll Love About Working Here

Opportunity to work with advanced, carrier‑grade VoIP technologies and large‑scale SIP networks.Collaborative, engineering-focused culture that values deep technical expertise.Exposure to complex VoIP architectures, cutting‑edge SBC platforms, and high‑impact voice services.Continuous learning environment with opportunities for certification and skill advancement.Work with global teams, carriers, and multi‑vendor environments, broadening your technical footprint

About Us

We are a forward‑thinking organization committed to delivering highly reliable, scalable, and secure voice solutions across global carrier networks. Our Network Operations Engineering team supports mission‑critical real‑time communication services, leveraging advanced VoIP technologies, strong carrier partnerships, and world‑class engineering practices.
Ref. code:  402160
Posted on:  29 Jan 2026
Experience Level:  Experienced Professionals
Contract Type:  Permanent
Location: 

Pune, IN

Brand:  Capgemini Engineering
Professional Community:  Manufacturing & Operations Engineering

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