Lead QA Engineer with VoIP/SIP stack

Description: Seeking an experienced Lead QA Engineer with VoIP and SIP stack expertise for the Net2Phone UCaaS platform team. Focus on manual testing, microservices/API validation, requirements testing, and establishing release guidelines. Requirements: 6+ years in QA Engineering with a focus on Backend and API/Microservices testing (REST, JSON, gRPC). 2+ years in VoIP/SIP Protocol Testing, including call flow verification and media stream validation. Strong command of Linux CLI and SIP tracing tools (e.g., Hepic, CP Tools, tcpdump). Upper-Intermediate (B2) or higher English proficiency (written and spoken). Nice to have: Experience with load testing tools (JMeter, Gatling), build testing, and Java programming. Benefits: Remote or hybrid work opportunity (Belarus-Moldova). Stable job with long-term growth perspective and competitive salary. Continuous learning and career growth opportunities, including compensation for professional training. Company-supported English classes and referral program rewards.