at Capgemini
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**Lead our VoIP infrastructure, optimizing carrier-grade SIP and VoIP systems. Troubleshoot complex SIP/RTP issues across multi-carrier environments. Mentor junior staff while working with vendors and carriers to ensure service functionality. Requires 7+ years of hands-on VoIP engineering experience with strong SIP expertise.**
- Compensation
- Not specified
- City
- Not specified
- Country
- India
Currency: Not specified
Full Job Description
Your Role
As a Senior VoIP Engineer, you will play a key role in designing, optimizing, and supporting carriergrade SIP and VoIP infrastructure. You will serve as the highest-level technical escalation point for complex SIP signaling, media issues, and interoperability challenges across multicarrier environments. Your expertise will ensure reliable, secure, and highquality 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 oneway 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 endtoend 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
Preferred:Experience with ENUM, LNP, routing databases, or SS7SIP 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 Youll Love About Working Here
About Us
At Capgemini Engineering, the world leader in engineering services, we bring together a global team of engineers, scientists, and architects to help the worlds most innovative companies unleash their potential. From autonomous cars to life-saving robots, our digital and software technology experts think outside the box as they provide unique R&D and engineering services across all industries. Join us for a career full of opportunities. Where you can make a difference. Where no two days are the same.
Capgemini is a global business and technology transformation partner, helping organizations accelerate their dual transformation to address the evolving needs of customers and citizens. With a strong 55-year heritage and deep industry expertise, Capgemini is trusted by its clients to address the entire breadth of their business needsfrom strategy and design to operations.
To achieve this, Capgemini draws on the capabilities of its 360,000 team members in more than 50 countries, all driven by the purpose of unleashing human energy through technology for an inclusive and sustainable future. It is a responsible and diverse organization with market-leading capabilities in digital, cloud, and data.
