System Performance Test Engineer (VoIP)

Our approach is built around collaboration and long-term partnership. We work closely with stakeholders at every level of the organization—from executive leadership to engineering and operations teams—to provide scalable, resilient, and secure technology solutions that solve complex business and operational challenges.

With deep expertise in cloud-first architectures, automation, DevSecOps, virtualization, reliability engineering, and large-scale systems integration, we help organizations modernize infrastructure, improve operational efficiency, and support mission-critical environments where performance, security, and resiliency are essential.

Our team consists of highly skilled engineers, architects, developers, and technology specialists who thrive on solving complex technical challenges. We foster a culture centered around innovation, collaboration, continuous learning, and technical excellence while delivering meaningful value to our clients across highly regulated and fast-evolving industries.

Why join us?

Our client offers highly competitive compensation packages, comprehensive benefits, and a collaborative, people-first culture that promotes innovation, professional growth, and long-term career development. We are committed to creating an environment where employees are empowered to make an impact, work alongside highly talented teams, and contribute to meaningful, mission-critical initiatives in a supportive and forward-thinking workplace.

Job Details

System Performance Test Engineer – VoIP

Position Summary

We are seeking a System Performance Test Engineer with strong hands-on Voice over IP (VoIP) testing experience to perform detailed performance verification of mission-critical voice communications systems.

This role will focus specifically on validating voice-channel performance and audio-quality requirements through laboratory and system-level testing. The ideal candidate has experience testing VoIP or telecommunications systems beyond basic functional call testing and understands how to measure, analyze, troubleshoot, and document voice-channel performance characteristics.

Key Responsibilities

• Develop, execute, and document detailed performance test procedures for VoIP and voice communications systems.
• Perform hands-on testing of voice channels, interfaces, network components, and integrated communications equipment.
• Verify voice-channel performance requirements, including:

o Background noise o Idle channel noise o Impulse noise o Crosstalk o Frequency response o Intermodulation distortion o Harmonic distortion o Longitudinal balance o Gain tracking o Hybrid balance o Return loss o Tone elimination o Speech quality

• Configure test environments, instrumentation, endpoints, network connections, and system components required for performance testing.
• Capture and analyze voice and network performance data.
• Compare measured results against system requirements and defined acceptance criteria.
• Troubleshoot performance anomalies and isolate issues across hardware, software, network, interface, and configuration layers.
• Document defects with detailed test conditions, measurements, logs, and reproducible steps.
• Work closely with systems, software, network, hardware, and test engineers to investigate and resolve performance issues.
• Perform regression testing following software, hardware, network, or configuration changes.
• Support formal qualification testing, Factory Acceptance Testing (FAT), customer demonstrations, and system acceptance activities.
• Produce clear test reports documenting methodology, measurements, results, failures, and conclusions.

Required Qualifications

• Bachelor's degree in Electrical Engineering, Computer Engineering, Computer Science, Telecommunications, or a related technical field, or equivalent relevant experience.
• Hands-on experience testing VoIP systems.
• Demonstrated experience performing voice-channel performance testing, not solely functional VoIP testing.
• Experience testing and analyzing multiple voice-quality characteristics such as noise, crosstalk, frequency response, distortion, balance, gain, return loss, tone handling, and speech quality.
• Strong understanding of VoIP and telecommunications fundamentals.
• Experience developing and executing formal test procedures.
• Experience using test equipment and/or software tools to capture, measure, and analyze voice performance.
• Strong troubleshooting and root-cause-analysis skills.
• Ability to clearly document quantitative test results and technical findings.

Preferred Qualifications

Experience with Air Traffic Management, air traffic control voice communications, radio communications, FAA systems, or other mission/safety-critical voice systems would be highly desirable. Additional experience with SIP/RTP, packet analysis/Wireshark, Linux, network testing, Jira, requirements traceability, automated testing, and formal FAT/SAT environments would also be beneficial.

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