VoIP Performance Test Engineer — System Reliability

Jobot

Columbia (MD)

On-site

USD 120,000 - 180,000

Full time

39 hours ago

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Job summary

Jobot is seeking a System Performance Test Engineer with strong hands-on VoIP testing experience to perform detailed performance verification of mission-critical voice systems. This role focuses on validating voice-channel performance and audio quality in lab and live environments.

The ideal candidate has background in testing VoIP or telecom systems beyond basic functional testing and can measure, analyze, troubleshoot, and document voice-channel performance characteristics for complex

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.

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: Background noise, Idle channel noise, Impulse noise, Crosstalk, Frequency response, Intermodulation distortion, Harmonic distortion, Longitudinal balance, Gain tracking, Hybrid balance, Return loss, Tone elimination, 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, FAT, SAT, customer demonstrations, and system acceptance activities.
Produce clear test reports documenting methodology, measurements, results, failures, and conclusions.