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Mikhail Filimonau

@mikhailfilimonau

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ISTQB-certified QA Analyst improving enterprise web, mobile, and airline reservation quality.

United States

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What I'm looking for

I’m looking for a QA role where I can lead SIT/UAT and regression validation, collaborate with Agile teams, and expand automation with Tosca/Selenium to deliver high-availability releases with fewer production defects.

I’m an ISTQB-certified QA Analyst with 7+ years of experience testing enterprise web, mobile, and airline reservation systems in high-availability environments. I specialize in SIT, UAT, regression, and end-to-end workflow validation across booking, payment, and GDS-integrated platforms.

At Spirit Airlines, I developed and executed SIT/UAT test cases and regression scenarios for complex transaction workflows across web, mobile, and desktop. I manage defect triage and release validation using Jira and Azure DevOps, and I validate REST APIs with Postman—checking authentication, status codes, response payloads, headers, and backend data integrity.

I’m hands-on with data and quality assurance end to end: I run SQL and backend data validation after data migration and multi-system integration to ensure transactional accuracy and data consistency. I also perform accessibility-related testing for customer-facing applications and self-service kiosks, including audio navigation validation and UI scaling/responsiveness checks using Axe DevTools.

I support test automation efforts with Tricentis Tosca and Selenium, including regression suite maintenance and automated execution. I’ve optimized testing strategy to reduce production bugs by 17% over 2 years, and I mentor junior testers to improve team productivity and technical knowledge.

Experience

Work history, roles, and key accomplishments

QA Analyst

Spirit Airlines

Sep 2021 - May 2026 (4 years 8 months)

Tested airline reservation systems (booking, payment, GDS, kiosks) across web, mobile, and desktop; executed SIT/UAT and end-to-end regression, and validated REST APIs and SQL data integrity. Supported Tosca/Selenium regression automation and production release validation, reducing production bugs by 17% over two years while mentoring junior testers.

SIT Testing UAT Testing Regression Testing Data Validation Jira Azure DevOps Tricentis Tosca Selenium

QA Engineer

RAM Technologies

Apr 2019 - Oct 2021 (2 years 6 months)

Performed functional, UI, UAT, regression, and smoke testing for web and mobile applications in Agile. Used Jira (Zephyr) for test case execution and defect tracking, validated APIs with Postman, and conducted SQL-based data integrity checks and cross-device compatibility testing.

Agile QA UI Testing UAT Testing Regression Testing Smoke Testing SQL Testing (DBeaver MySQL Workbench)Device Compatibility Testing Defect Triage

QA /BA Analyst

Web People Consult

Apr 2018 - Mar 2019 (11 months)

Reviewed system design documents, specifications, and user stories to create test cases aligned to requirements and ensure thorough test coverage. Conducted smoke, functional, and UI testing, and worked with developers during Agile sprints to validate defects and resolve issues.

Smoke Testing Functional Testing UI Testing Agile Ceremonies User Story Development

IT Analyst

Prior Logist

Apr 2011 - Jan 2018 (6 years 9 months)

Troubleshot and debugged issues on Windows and Linux application servers while evaluating software performance and usability against requirements. Supported in-house development by assessing functional requirements, identifying automation/optimization opportunities in IT infrastructure, and managing the accuracy of a management accounting system.

Windows Server Debugging Performance Testing Usability Testing Functional Testing Automation IT Infrastructure Support