Karthik Gaekwad, Head of Cloud Native Engineering at Verica, shares his approach to extreme testing, which involves shifting testing left with development and operations. He emphasizes the importance of thinking about testing before writing code, using virtual device testing with unit and integration tests, and continuous verification to improve the customer experience. Extreme testing yields more objective results, especially over time, and supports objectively measuring code coverage against a defined bar. Gaekwad also discusses how extreme testing improves the code lifecycle by giving developers confidence in functionality and reusing code. He recommends resources such as DevOpsDays for engineers to hear quality speakers and get feedback from peers.