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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # QA Automation Engineer - **Company:** Experis - **Location:** London, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Application Programming Interfaces (APIs), JIRA, Automation of Tests, VoIP, Software Bug Management, CentOS, Continuous Integration, Dynamic Host Configuration Protocol, Linux, DevOps, Domain Name System (DNS), Python (Programming Language), Lightweight Directory Access Protocols (LDAP), Pcap, Load Testing, Windows Servers, Network Diagnostics, Network Service, Red Hat Enterprise Linux, Test Case, Test Execution Engine, Test Management, Wireshark, Scripting, Performance Testing, Test Scripts, Rhino, Blazemeter, Integration Tests, Network Server, Media Servers - **Published:** August 26, 2026 - **Apply:** https://www.experis.co.uk/job/senor-qa-automation-engineer-6006569/apply ## About the Role * SSCA SIP School Certified Associate * Knowledge in Intelligent Network service protocols like INAP, CAP, MAP * Experience in using Metaswitch Scenario Simulator for producing test scenarios for SIP, INAP, MAP protocols etc. * Experience in developing scripting, e.g. Python ## Description We are seeking a highly skilled VoIP Services Tester with Automation Experience to join our engineering team. In this role, you will ensure the reliability, quality, and security of our real-time voice and video communication systems. You will lead the design of automated testing frameworks, author rigorous technical test cases, and produce comprehensive test reports that drive our deployment decisions. The ideal candidate bridges the gap between deep network protocol analysis and modern software automation, ensuring exceptional voice quality and system stability across our global telecom infrastructure. As part of this role, you are required to do the following 1. Test Automation & Framework Development * Design Automation: Develop, scale, and maintain automated test frameworks for signaling, media handling, and regression suites. * Simulate Load: Build automation scripts to simulate high volumes of concurrent calls, load stress, and network degradation. * CI/CD Integration: Embed automated test scripts into continuous integration pipelines (e.g., Jenkins, GitLab, GitHub Actions). 2. Test Documentation & Case Design * Design Test Cases: Author highly detailed test cases covering functional, negative, security, boundary, and edge-case scenarios for multi-party call flows. * Test Case Repository: Manage and structure test suites inside test management platforms (e.g., Jira). * Track Traceability: Ensure full traceability between business requirements, technical specifications, and executed test cases. 3. Protocol Validation & Network Diagnostics * Analyze Traffic: Capture and evaluate packet data using Wireshark and tcpdump to diagnose audio drops, call failures, or one-way media. * Validate Protocols: Verify SIP signaling, SDP negotiations, and RTP/SRTP media stream compliance. * Assess Quality Metrics: Continuously monitor and log critical VoIP KPIs including jitter, packet loss, latency, and Mean Opinion Score (MOS). 4. Test Reporting & Defect Management * Publish Test Reports: Generate comprehensive test execution summaries, metric dashboards, and formal test closure reports for stakeholders. * Document Defects: Log clear, actionable bugs in Jira accompanied by SIP ladder diagrams, automated logs, and PCAP file captures. * Collaborate on Fixes: Partner closely with DevOps and Network Engineers to isolate, reproduce, and resolve complex infrastructure bugs. Essential * SIP/VoIP call performance testing with SIPp, Spectra, WinSIP, StarTrinity * Automation using Python & Robot Framework * API Test Automation & performance testing with Locust, Blazemeter/Taurus, k6, newman, jmeter * GUI Automation with TestCafe * CI/CD Test Integration * Linux & Windows basic administration skills * Expertise in Operating Systems like Linux ( RHEL, CentOS , OEL) , Windows Servers/Workstations along with Servers DNS/DHCP/LDAP/A.D * Experience in Telecom Applications ( Metaswich Rhino, Dialogic Media Server, Perimeta SBC ) and Telecom Protocols ( SIP, RTP ) * Have good Knowledge in ITIL Process and Security implementation/System hardening on Telecom Applications and Services ## Related Videos - [Improving quality with Agentic AI with Rovo Dev and Xray](https://www.wearedevelopers.com/videos/2005-improving-quality-with-agentic-ai-with-rovo-dev-and-xray) - [Getting under the skin: The Social Engineering techniques](https://www.wearedevelopers.com/videos/38-getting-under-the-skin-the-social-engineering-techniques) - [Continuous testing - run automated tests for every change!](https://www.wearedevelopers.com/videos/190-continuous-testing-run-automated-tests-for-every-change) - [AIQSpecFlow: Improves and automates your agile process of specification and creation of testcases.](https://www.wearedevelopers.com/videos/100084-aiqspecflow-improves-and-automates-your-agile-process-of-specification-and-creation-of-testcases) - [Collaboration Quantified: Lessons from Open Source Developer Networks](https://www.wearedevelopers.com/videos/1422-collaboration-quantified-lessons-from-open-source-developer-networks) - [Enabling automated 1-click customer deployments with built-in quality and security](https://www.wearedevelopers.com/videos/83-enabling-automated-1-click-customer-deployments-with-built-in-quality-and-security) ## Related Articles - [The 8 Best Code Testing Tools](https://www.wearedevelopers.com/magazine/402-the-8-best-code-testing-tools) - [Benefits of Using JMeter For Performance Testing](https://www.wearedevelopers.com/magazine/96-benefits-of-using-jmeter-for-performance-testing) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [What is a Test Plan: Guide to Test Planning](https://www.wearedevelopers.com/magazine/191-what-is-a-test-plan-guide-to-test-planning) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline)