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Oleh Koren

Real-world insights on performance testing, system limits, and production lessons. Udemy Instructor | AWS CCP

Joined on Feb 6, 2026 https://www.linkedin.com/in/oleh-koren/

Work

Senior Performance QA Engineer at Provectus

Oleh Koren

Feb 19

How to Find Your API’s Breaking Point (Before Your Users Do) - Capacity Testing with JMeter

#testing #performance #jmeter #grafana

5 min read

Oleh Koren

Feb 13

Behind the Scenes: Why I Created a Performance Testing Course

#testing #performance

4 min read

Oleh Koren

Feb 11

Your Load Test Passed. Production Still Failed. Why?

#performance #loadtesting

2 min read

Oleh Koren

Feb 9

Why Percentiles Matter More Than Average Response Time in Performance Testing

#performance #loadtesting #performancetesting #testing

3 min read

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