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VoIP Developer

  • Location:

    Guildford, Surrey

  • Sector:


  • Job type:


  • Salary:

    £35000 - £45000 per annum

  • Contact:

    Woking Branch

  • Contact email:

  • Job ref:


  • Published:

    about 1 month ago

  • Expiry date:


  • Startdate:


Job Description

I am currently supporting a long-established and respected telecoms company based in Guldford who are looking for a senior, talented and experienced VoIP-centric developer to join there small Software Development Team, as they expand and extend there enterprise-level SIP platform and its associated services, while also taking on exciting new integrations with AI systems.

Daily duties of a Senior VoIP Developer

Key activities include:

  • Design and develop VoIP and related services & components for our SIP platform.
  • Design and develop integrations for external systems, including AI services.
  • Analyse, trouble-shoot and provide robust resolutions to arising SIP/RTP issues.
  • Ensure secure software design and development, at all levels.
  • Assist the Team in defining/improving secure development processes and policies, as well as ensuring compliance with security standards (such as ISO27001 and PCI-DSS).

Crucial Skills for This Role

A proven, in-depth, working knowledge of:

  • SIP and associated protocols (SDP, RTP etc)
  • Freeswitch, its configuration and associated source code
  • Kamailio and its configuration
  • Networking and network security
  • Secure Systems Design
  • Development-level support of a real-world SIP platform
  • Python
  • C/C++
  • WebRTC
  • Ubuntu
  • Wireshark for SIP/RTP trace analysis/fault-finding/problem-solving

Excellent written and verbal communications skills, both when dealing with technical and non-technical audiences, are also essential for this role.

Additional Skills/Knowledge

Knowledge/experience of the following would prove advantageous for this role:

  • T38
  • Pytest, Flask, SQLAlchemy, Marshmallow, Jinja
  • Git/Github
  • Docker/Dockerhub
  • Rancher/Kubernetes
  • AWS or similar
  • 0Auth
  • C#/.NET


  • Salary £35,000 - £45,000
  • Home working
  • Pension
  • Medical

If this sounds of interest please apply today - call Lisa on 07841 007173 or send your cv


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