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Unified Communication Software Engineer | 4 to 7 years | Bangalore

Capgemini

Capgemini

Software Engineering
India
Posted on Feb 10, 2026

At Capgemini Engineering, the world leader in engineering services, we bring together a global team of engineers, scientists, and architects to help the world’s 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.

Job Description

Role Overview

The selected engineer will work closely with a talented team to support Unified Communication customer issues and sustaining engineering activities. The role involves debugging complex VoIP/Voice Gateway issues, working on embedded C components, and ensuring high CSAT by delivering quick and high‑quality resolutions.

Key Responsibilities

  • Provide L3/L4‑level support for UC and Voice Gateway products
  • Analyze, debug, and resolve customer‑reported issues in VoIP and voice media components
  • Work on embedded C codebase, crash analysis, memory corruption debugging, and protocol tracing
  • Recreate customer scenarios, set up test beds, and validate fixes
  • Collaborate with cross‑functional teams for issue triage, defect resolution, and feature enhancements

Minimum Qualifications

  • Computer Science or Computer Engineering with 4–6 years of experience in Telecom or Networking
  • Strong hands‑on expertise in Embedded C programming and debugging large codebases
  • Deep understanding of VoIP, SIP/MGCP/SCCP, RTP/RTCP, analog interfaces (FXS/FXO/E&M), and digital interfaces (T1/E1/PRI/BRI)
  • Knowledge of voice supplementary services, DTMF relay (in‑band/out‑of‑band), T.38 fax relay, modem relay, V.150.1 MER
  • Solid networking fundamentals (TCP/IP, DNS, DHCP, VLANs) and proficiency with packet capture tools (Wireshark)
  • Strong system‑level debugging and ability to set up complex test environments

Preferred Qualifications

  • Experience in customer support, sustaining engineering, or TAC
  • Expertise with debugging tools such as gdb
  • Knowledge of WebEx Calling, Microsoft Cloud Calling, and ZTP
  • Experience working with Cisco UC platforms like CUCM and collaboration tools
  • Strong teamwork, quick learning ability, and result‑driven attitude

Primary Skills

  • Computer Science or Computer Engineering with 4–6 years of experience in Telecom or Networking
  • Good Understanding of Embedded C programming and debugging large codebases
  • Deep understanding of VoIP, SIP/MGCP/SCCP, RTP/RTCP, analog interfaces (FXS/FXO/E&M), and digital interfaces (T1/E1/PRI/BRI)
  • Knowledge of voice supplementary services, DTMF relay (in‑band/out‑of‑band), T.38 fax relay, modem relay, V.150.1 MER
  • Solid networking fundamentals (TCP/IP, DNS, DHCP, VLANs) and proficiency with packet capture tools (Wireshark)
  • Strong system‑level debugging and ability to set up complex test environments
  • Work Experience on L3/L4 Support.

Capgemini is a global business and technology transformation partner, helping organizations to accelerate their dual transition to a digital and sustainable world, while creating tangible impact for enterprises and society. It is a responsible and diverse group of 340,000 team members in more than 50 countries. With its strong over 55-year heritage, Capgemini is trusted by its clients to unlock the value of technology to address the entire breadth of their business needs. It delivers end-to-end services and solutions leveraging strengths from strategy and design to engineering, all fueled by its market leading capabilities in AI, generative AI, cloud and data, combined with its deep industry expertise and partner ecosystem.