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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.udemy.com/course/performance-testing-fundamentals-from-basics-to-hands-on/

Work

Senior Performance QA Engineer at Provectus

Pinned

Oleh Koren

Feb 13

Behind the Scenes: Why I Created a Performance Testing Course

#testing #performance

4 min read

Cover image for Hidden Problem That Makes Most Load Tests Unrealistic

Oleh Koren

Mar 18

Hidden Problem That Makes Most Load Tests Unrealistic

#performance #softwaretesting #loadtesting

4 min read

Cover image for What Does a Performance QA Engineer Actually Do?

Oleh Koren

Mar 9

What Does a Performance QA Engineer Actually Do?

#career #performance #testing

4 min read

Cover image for Black Friday: Would You Choose the Right Performance Test?

Oleh Koren

Feb 27

Black Friday: Would You Choose the Right Performance Test?

#performance #loadtesting #softwaretesting #testing

2 min read

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

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

Cover image for Your Load Test Passed. Production Still Failed. Why?

Oleh Koren

Feb 11

Your Load Test Passed. Production Still Failed. Why?

#performance #loadtesting

2 min read

Cover image for Why Percentiles Matter More Than Average Response Time in Performance Testing

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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