A quality engineer shares remote-team tips, contract testing, and data-driven performance testing.

Bernardo Guerreiro discusses thriving in a fully remote, globally distributed engineering culture, emphasizing asynchronous communication, transparency, shared knowledge, and treating a support/service desk as a first-class citizen. He explains contract testing for microservices architectures and, crucially, knowing when NOT to apply a favourite technique if it doesn't fit a company's maturity. At Auth0 he prioritized performance testing over contract testing, using tools like Artillery and K6 close to the developer stack and a data-driven approach that profiles real customer usage patterns and past incidents. He closes on observability, traceability, and his interest in mentoring newcomers to testing.

**In this episode:**

**Guest:** Bernardo Guerreiro — Quality Engineer / Quality Advocate, Auth0  

> “You have to be careful not to try and apply everything you know, because it won't necessarily fit the maturity or the stage or the tech that that company is using.”

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