QA Engineer Voice Platform (Dev-Tester)

About Yubi

Yubi, formerly known as CredAvenue, is re-defining global debt markets by freeing the flow of finance between borrowers, lenders, and investors. We are the world's possibility platform for the discovery, investment, fulfillment, and collection of any debt solution. At Yubi, opportunities are plenty and we equip you with tools to seize it.

In March 2022, we became India's fastest fintech and most impactful startup to join the unicorn club with a Series B fundraising round of $137 million.

In 2020, we began our journey with a vision of transforming and deepening the global institutional debt market through technology. Our two-sided debt marketplace helps institutional and HNI investors find the widest network of corporate borrowers and debt products on one side and helps corporates to discover investors and access debt capital efficiently on the other side. Switching between platforms is easy, which means investors can lend, invest and trade bonds - all in one place. All of our platforms shake up the traditional debt ecosystem and offer new ways of digital finance.

Role Summary

We are seeking a QA Engineer (Dev-Tester) specialized in voice technology to ensure the reliability of our real-time AI platforms. You will move beyond functional testing to perform deep protocol analysis, load testing, and root-cause isolation across SIP and media layers.

Technical Responsibilities

• Voice Flow Validation: Test complex call lifecycles across telephony stacks (FreeSWITCH, Asterisk, Kamailio, or Twilio/Exotel).
• Protocol Analysis: Use sngrep, Wireshark, and Homer (HEPv3) to debug SIP signaling and RTP media streams.
• Network Performance Testing: Analyze the impact of latency, jitter, and packet loss on voice quality and ASR/NLU accuracy.
• API & Integration Testing: Validate REST/WebSocket APIs and event-driven architectures (Kafka/Redis).
• Performance Engineering: Conduct load tests to define and verify concurrent call capacity.
• Test Automation: Build and maintain automated regression suites using Python, Node.js, or Bash.

Required Skills

• Telephony: Practical exposure to SIP/RTP fundamentals and real-time call flows.
• Debugging: Expert level in Linux log debugging and SIP trace analysis.
• Tools: Proficient with Postman, sngrep, and cloud environments (AWS).
• Nice to Have: Experience with ASR/NLU testing, dialer campaigns, and CI/CD pipelines.