VoIP Automation Engineer — Build SIP/RTP test frameworks

Randstad Technologies Recruitment; Ipswich; Hybrid; GBP 55,000 - 68,000; Full time

Job summary

Randstad Technologies Recruitment in the United Kingdom is seeking a VoIP Automation Tester for a 6-month contract in Ipswich. Hybrid work with 3 days per week in the office, payrate 300 to 369 per day on Inside IR35 via Umbrella.

You will build automated test frameworks for signaling and media handling, simulate load, diagnose issues via packet captures, and integrate scripts into Jenkins or GitLab CI/CD.

Qualifications

• Deep knowledge of SIP, RTP, and SDP.
• Proficient in Python and Robot Framework for test automation.
• Experience with packet capture analysis using Wireshark and tcpdump.
• Familiar with PCAP analysis and VoIP testing tools.

Responsibilities

• Build and maintain automated test frameworks for signaling and media handling.
• Simulate concurrent call load and network degradation.
• Diagnose audio drops and call failures using packet captures.
• Integrate test scripts into CI/CD pipelines (Jenkins, GitLab).

Skills

SIP

RTP

SDP

Python

Robot Framework

Wireshark

tcpdump

PCAP

SIPp

Spectra

WinSIP

StarTrinity

Linux

RHEL/CentOS

Server administration

Tools

SIPp

Spectra

WinSIP

StarTrinity

Job description

Randstad Technologies Recruitment in the United Kingdom is seeking a VoIP Automation Tester for a 6-month contract in Ipswich. Hybrid work with 3 days per week in the office, payrate 300 to 369 per day on Inside IR35 via Umbrella.

You will build automated test frameworks for signaling and media handling, simulate load, diagnose issues via packet captures, and integrate scripts into Jenkins or GitLab CI/CD.