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Manual QA Engineer with hands-on experience in healthcare, crypto analytics and commercial web platforms, focused on quality assurance of complex web systems and APIs. Strong background in API and backend testing using Postman, Swagger and GraphQL, with practical experience validating business logic, role-based access control and multi-role user scenarios. Experienced in testing crypto transaction analytics platforms with Telegram bot integrations and web dashboards, validating transaction analysis workflows, signals and backend data consistency. Experienced in end-to-end payment flow testing with Stripe, including negative and edge cases. Confident in data validation and consistency checks using SQL and PostgreSQL, as well as in UI verification against Figma designs and frontend–backend communication analysis via DevTools. Also experienced in testing Drupal-based CMS admin panels, including content management, data structures and permission settings.