VoIP Developer - Contract

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Tregonhawke, UK
Closing date
18 Sep 2020

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Technology & New Media
Contract Type
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VoIP Developer


3 - 6 Month Contract


Job Description

Expand are looking for a senior VoIP Developer to aid in the integration of the next generation of mesh into broadband products. Developers will be involved in the development and integration work using C, Python mainly but knowledge of Shell Scripting would be useful. Successful candidates will also need to have extensive knowledge of VOIP and SIP Stack Protocols.

Key responsibility

To Design and integrate VOIP and SIP into Routers and Wi-Fi Products,

To develop Embedded devices (not IT systems or applications), using C

Using Embedded Linux to have communications between user space and kernel eg socket programming

Knowledge of low-level design helps, as regularly issues will arise and diving into the drivers to debug is very common.

Required Qualifications

· Embedded C is the core language used

· Embedded Linux as all devices are Linux based

· Knowledge of digital telephony as a replacement of analogue

· Voice over IP


o Call flows

o Network protocols

· To understand Network protocols, Stacks and implementation - xDSL, G.Fast, FTTx

· To understand Internet Protocols throughout the ISO stack

· RDK would be useful as they are moving to this

· Shell scripting may be useful

· Use of tools for managing development and bug tracking such as Jira
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