VLADISLAV User

I've tested a Healthcare Information System for a Bone Marrow Registry at Reactive, focusing on the backend behavior, integrations, and data reliability behind critical healthcare workflows.

I validate REST APIs with Postman and Swagger, investigate defects across services, and verify PostgreSQL data with SQL queries using JOIN, GROUP BY, and HAVING. My testing covers functional, regression, smoke, integration, and database scenarios.

Before QA, I analyzed integrations at Kontur and РТ МИС, including travel-platform and healthcare-system connections with 1C. I translated business workflows into technical specifications, validated JSON exchanges, and identified integration gaps before implementation.

I'm drawn to complex distributed systems where careful investigation, business-logic analysis, and early validation improve release quality and reduce production risk.