Lead QA Engineer with VoIP/SIP stack

We are looking for an experienced Lead QA Engineer with VoIP/SIP stack to join us in the development of a Net2Phone UCaaS platform. What you will be doing: Be a member of a SCRUM team with all related artefacts. Write test cases with detailed steps in TestRail. Automate new test cases, extend and maintain existing cases in different integration areas. Integrate Automated testing within CI for all deployment tasks. Take part in building automation for calling functionality. Solve a complex task which make automation-as-a-tool and orchestrate different layers into one quality gateway Build and execute deployments in Jenkins for all environments. Communicate and escalate product quality issues. We use next technologies in our work: Default is Java 11/17. Junit5, TestNG, Gradle and other cool stuff Work with real calls automation SIP Load framework with real traffic emulation Jenkins as a CI/CD system. Jira for project management and bug tracking. TMS is TestRail. We expect you to have: Must-have: 5+ years of total experience in QA Automation with a strong focus on Backend & API testing. 2+ years of hands-on experience in VoIP / SIP protocol testing (call flow automation, media stream verification, WebRTC, or telecom load tools). Strong Java expertise (Java 11/17) and proficiency with test frameworks (JUnit5, TestNG, Gradle). Upper-Intermediate ( B2 ) English level or higher (both written and spoken). Hands-on experience with API & Microservices automation (REST, JSON, gRPC). Strong troubleshooting and analytical skills using network analysis tools (e.g., Wireshark, tcpdump ) and Linux command line. Nice-to-have: Experience with Load & Performance testing tools (JMeter, Gatling, SIPp). Experience with Docker and containerized test environments. Familiarity with mock services and stubs (e.g., WireMock). Practical usage of TestRail for test coverage management and reporting. We offer you: Remote b2b or hybrid (Belarus-Moldova) work opportunity! Stable job with long-term growth perspective. Competitive salary with annual performance review. Really good hardware. An exciting and challenging job with talented people around. Continuous learning and career growth opportunities. Compensation for professional training, seminars, and conferences. Referral program – get rewarded for helping us grow the team with talented people. Company-supported English classes to enhance your professional growth. More perks for the Minsk and Chisinau office employees. A few words about us : IDT Corporation is a global communications company founded in 1990 and headquartered in Newark, New Jersey. We are industry leaders in prepaid communication and payment services and one of the largest international voice carriers. We are listed on the NYSE, employ over 1800 people across 20 countries, and have over $1.5 billion in revenues. We are not ”another big IT corporation”- we encourage and support in-house entrepreneurs in developing their ideas into business actions. Net2Phone is a rapidly growing global provider of unified cloud communications solutions. It was named ‘VoIP Supplier of the Year’ by the Telecom Consulting Group in 2018. Its cloud communication solution provides an integrated communications suite featuring powerful