Randstad Digital UK
VoIP / SIP Automation Tester
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Role: VoIP / SIP Automation Tester
Type: Contract (6 Months)
Location: Ipswich, UK
Working Model: Hybrid (3 days per week in office)
Payrate: £300 to £369 per day on Inside IR35 via Umbrella
We are looking for a highly skilled VoIP tester to ensure the reliability and quality of our real-time voice and video communication systems. If you can build automation frameworks from scratch and troubleshoot SIP call flows at the packet level, we want to hear from you.
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The Role:
- 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).
Must-Have Skills:
- Protocols: Deep knowledge of SIP, RTP, and SDP.
- Automation: Python and Robot Framework.
- Diagnostics: Wireshark, tcpdump, PCAP analysis.
- VoIP Tools: SIPp, Spectra, WinSIP, or StarTrinity.
- OS/Systems: Linux (RHEL/CentOS) and basic server admin.
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Nice-to-Have:
- Experience with Perimeta SBC, Metaswitch Rhino, or Dialogic Media Server.
- SSCA Certification or knowledge of IN protocols (INAP/MAP).
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