We are looking for a senior test engineer specializing in mobile audio/video quality assurance for our VoIP product (voice/video calling and real-time communication). You will drive specialized audio/video testing and automation infrastructure, and leverage AI to build testing tools that boost team efficiency.
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Responsibilities
- Own functional testing and quality assurance for mobile VoIP products (iOS/Android), covering 1v1 calls, group calls, weak-network conditions, and cross-platform interoperability.
- Conduct specialized audio/video testing: quantitative evaluation of FPS, freeze rate, end-to-end latency, echo, A/V sync, MOS, and other quality metrics; establish testing capabilities and quality baselines.
- Design and maintain UI automation frameworks (Appium or similar) to increase mobile regression coverage.
- Build and maintain API automation (Python + pytest/requests or similar) and integrate it into CI/CD pipelines.
- Leverage AI (LLMs, agents, AI coding tools) to create testing tools: intelligent test case generation, log analysis, defect triage, test data generation, and more.
- Contribute to test infrastructure: weak-network simulation, multi-device orchestration (ADB), and competitor benchmarking.
- Deliver quantified quality reports and drive engineering quality improvements.
Requirements (Must-Have)
- 3+ years of mobile testing experience, including hands-on experience with audio/video, VoIP, or RTC products.
- Practical experience in specialized audio/video testing: familiar with measurement methods and tools for FPS, freeze rate, end-to-end latency, and audio/video quality assessment.
- Proficient in UI automation (Appium/Airtest or similar) and API automation (Python + pytest or similar), with experience building automation frameworks from scratch.
- Strong Python skills for test tooling; familiar with ADB commands and multi-device management.
- Skilled at using AI for efficiency: demonstrable output using LLMs or AI coding tools to build test tools or AI-powered testing workflows.
- Strong debugging skills: able to independently analyze client logs, packet captures, and audio/video pipeline issues.
- Professional working proficiency in English (daily communication and documentation).
Nice-to-Have
- Familiarity with the WebRTC stack and audio/video codecs (Opus, H.264/H.265, etc.).
- Experience building weak-network testing platforms or device farms.
- Experience with performance testing and stability testing (e.g., Monkey/Fastbot).
- Exploration of cutting-edge directions such as VLM-driven UI automation or AI agent test orchestration.
What We Offer
- Deep involvement in building the QA system for a VoIP product serving hundreds of millions of users.
- An AI-first testing team culture that encourages reshaping QA workflows with AI.
- The opportunity to work alongside an experienced audio/video engineering team.
