QA Engineering Specialist

Role: VoIP / SIP Automation TesterType: Contract (6 Months)Location: Ipswich, UKWorking Model: Hybrid (3 days per week in office) About the RoleWe are looking for a Senior QA Automation Engineer who enjoys digging deep into real-time voice protocols while building clean, resilient automated test suites. In this role, you''ll help ensure our core VoIP and video infrastructure remains rock-solid, reliable, and secure under high load.You won''t just be running scripts-you''ll design automated test frameworks, trace complex call flows down to the packet level, and help shape deployment decisions alongside our dev and network teams.What You''ll DoBuild and Scale Automation: Design and maintain test automation frameworks for signaling, media processing, and regression testing using Python and Robot Framework.Simulate Real-World Load: Script high-volume stress tests, concurrent call simulations, and network degradation scenarios to test infrastructure limits.Integrate with CI/CD: Embed test suites directly into deployment pipelines (Jenkins, GitLab, GitHub Actions) for continuous feedback.Analyze and Diagnose Traffic: Use Wireshark and tcpdump to dissect PCAPs, trace call flows, and troubleshoot one-way audio, dropped calls, or media issues.Validate Telecom Protocols: Test and verify SIP signaling, SDP negotiations, and encrypted/unencrypted media flows (RTP/SRTP).Track System Quality: Monitor critical metrics like latency, jitter, packet loss, and MOS scores to safeguard voice ..... full job details .....