I am a results-driven QA Engineer with 10+ years of experience in manual and automated testing of web, mobile (iOS/Android), and desktop applications across Agile/Scrum and Waterfall. I specialize in white-box, black-box, and gray-box testing, with a strong foundation in test automation, API validation, and CI/CD integration. My background spans fintech, banking, consulting, and analytics. I excel at clear communication, analytical thinking, troubleshooting, and collaborative problem solving to deliver reliable software and fast feedback loops.

Sergey Gubenko

I am a results-driven QA Engineer with 10+ years of experience in manual and automated testing of web, mobile (iOS/Android), and desktop applications across Agile/Scrum and Waterfall. I specialize in white-box, black-box, and gray-box testing, with a strong foundation in test automation, API validation, and CI/CD integration. My background spans fintech, banking, consulting, and analytics. I excel at clear communication, analytical thinking, troubleshooting, and collaborative problem solving to deliver reliable software and fast feedback loops.

Available to hire

I am a results-driven QA Engineer with 10+ years of experience in manual and automated testing of web, mobile (iOS/Android), and desktop applications across Agile/Scrum and Waterfall. I specialize in white-box, black-box, and gray-box testing, with a strong foundation in test automation, API validation, and CI/CD integration.

My background spans fintech, banking, consulting, and analytics. I excel at clear communication, analytical thinking, troubleshooting, and collaborative problem solving to deliver reliable software and fast feedback loops.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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Language

English
Fluent
Ukrainian
Fluent
Russian
Advanced

Work Experience

Software QA Engineer/SDET at Chime Inc.
January 1, 2019 - Present
Led end-to-end quality strategy and methodology for Chime’s flagship programs (SpotMe, Credit Builder, MyPay, Chime+), ensuring reliable high-quality releases. Designed and implemented Ruby-based automation frameworks integrated into CI/CD pipelines, reducing manual regression effort and improving deployment reliability. Created test strategies spanning API, integration, functional, and exploratory testing to catch defects early and provide rapid feedback. Built and maintained end-to-end and integration test suites covering critical backend services, improving system stability and test coverage. Delivered production-grade test code and TDD-based validations for backend services, collaborating with developers to improve code quality and prevent regressions. Improved observability and release readiness by setting up monitoring dashboards, alerting, and QA metrics via DataDog and internal tools, enhancing post-release visibility and defect traceability. Coordinated large-scale bug bash
Quality Engineer Mobile at Slack Technologies
July 1, 2018 - January 1, 2019
Carried out feature/integration/smoke/regression/system and exploratory testing. Ran automation scripts using Android Studio and analyzed failures. Reviewed and analyzed business requirements, specs, and design docs to develop test strategies for various new features, and created detailed test documentation (test plans, cases, scenarios). Worked closely with multiple teams across Slack pillars to ensure consistent project execution; estimated, prioritized, planned, and coordinated testing activities. Identified and analyzed software failures, filed issues, and improved user experience; tracked defects and performed bug verification testing. Prepared and presented reports and metrics to senior management. Participated in daily stand-ups, team planning meetings, and sprint assignments.
Software QA Engineer at Apple
August 1, 2015 - March 1, 2017
Performed manual and automated testing of Maps client across iOS, CarPlay, watchOS, and macOS; conducted functional, installation, usability, integration, performance, regression testing (white/black-box); performed API testing with Postman. Executed automation tests using Selenium WebDriver with Python; analyzed failures and filed defects in internal bug tracker Radar. Created Python and VBA scripts for data standardization; prepared ground truths using GeoJSON format. Performed data QA/QC and spatial analysis using GIS software and SQL queries; automated data reporting with Python and SQL. Contributed to global project documentation and knowledge transfer for new hires.
Software QA Engineer at OS X
August 1, 2015 - March 1, 2017
Manual and automated testing of web/mobile applications across environments and devices; black-box testing; performed sanity, build acceptance, and regression testing. Prepared, executed, and maintained test cases and automation scripts in TestRail and Selenium WebDriver. Reported software failures in JIRA; participated in bug scrubs; collaborated with developers to resolve issues. Participated in daily stand-ups, sprint planning, and bug triage.
Software QA Engineer / SDET at Chime Inc.
January 1, 2019 - Present
Led end-to-end quality strategy for flagship programs (SpotMe, Credit Builder, MyPay, Chim e+), ensuring reliable high-quality releases. Designed and implemented Ruby-based automation frameworks integrated into CI/CD pipelines, reducing manual regression efforts and boosting deployment reliability. Created comprehensive test strategies combining API, integration, functional, and exploratory testing, improving defect detection and coverage. Built and maintained end-to-end and integration test suites covering critical workflows, backend services, and frontend components, enhancing system stability and test coverage. Improved observability and release readiness by setting up monitoring dashboards and QA metrics via DataDog and internal tools, enabling better defect tracing and post-release visibility. Coordinated large-scale bug bash and pre-launch QA initiatives across Product, Risk, and Engineering to identify critical defects and ensure smooth launches. Used AI-powered tools for automa
Quality Engineer - Mobile (Contract) at Slack Technologies
July 1, 2018 - January 1, 2019
Carried out feature/integration/smoke/regression/system and exploratory testing. Ran automation scripts using Android Studio and analyzed failures. Reviewed business requirements, specs, and design docs to develop test strategies for new features and created detailed test documentation (test plans, test cases, test scenarios). Worked closely with multiple teams across Slack pillars to ensure consistent project execution; estimated, prioritized, planned and coordinated testing activities.
Software QA Engineer at OSX
August 1, 2015 - March 1, 2017
Performed manual and automated testing of software across macOS and iOS environments. Executed cross-browser and cross-platform testing (Windows/macOS); performed sanitation, build acceptance, and regression testing. Authored and maintained test cases and automation scripts using TestRail and Selenium WebDriver. Logged defects in JIRA and collaborated with developers to resolve issues; participated in daily stand-ups and sprint planning.

Education

Python Programming Course at Mission College
January 1, 2017 - January 1, 2017
Master in Investment Project Financing at Kyiv National Economic University
January 11, 2030 - December 8, 2025
Bachelor in Finance at Kyiv National Economic University
January 11, 2030 - December 8, 2025
Python Programming Coursework at Mission College, Santa Clara, CA
January 1, 2017 - December 8, 2025
Master in Finance (Investment Project Financing facility) at Kyiv National Economic University, Ukraine
January 11, 2030 - December 8, 2025
Bachelor in Finance at Kyiv National Economic University, Ukraine
January 11, 2030 - December 8, 2025

Qualifications

Master (Investment Project Financing facility)
January 11, 2030 - December 8, 2025
Bachelor (Credit and Economics facility)
January 11, 2030 - December 8, 2025

Industry Experience

Software & Internet, Financial Services, Professional Services, Computers & Electronics

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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