Kristina Kolosovskaya

I’m a QA Team Lead with 6+ years in software testing, including 3 years leading end-to-end QA for FinTech products. I build test strategies, automation frameworks, and release processes that improve reliability across payment processing, transaction flows, and backend integrations.

I’m hands-on with JavaScript and modern test tooling such as Playwright and Cucumber, and I drive strong API testing using SOAP, REST, and GraphQL. I run tests in Dockerized environments and validate data and transactions with PostgreSQL, Oracle, and MySQL—so quality is measurable and repeatable.

Collaboration is central to how I work: I partner with developers, product owners, and stakeholders to make quality a shared responsibility. With risk-based testing and shift-left practices, I helped reduce post-release defects by 35%, while also improving team testing maturity through mentoring and coaching.

Beyond functional coverage, I extend quality to performance and real-world conditions using JMeter and cross-browser/platform validation with BrowserStack. From preparing the QA environment to delivering a ready release version, I focus on end-to-end testing discipline, integration confidence, and fast feedback.