Сергей

SERGII SHERSHNOV
Senior Software Quality Assurance Engineer & Python Automation Specialist
Phone / WhatsApp / Telegram: [открыть контакты](см. выше в блоке «контактная информация») Email: [открыть контакты](см. выше в блоке «контактная информация») Location: Remote / Ukraine

PROFESSIONAL SUMMARY
Senior Software Quality Assurance Engineer with 7+ years of hands-on experience in manual and automated testing across
Web, Mobile, Desktop, and hardware-integrated systems. Proven track record of ensuring high software reliability,
performance, and seamless user experiences in fast-paced product and startup environments. Deeply specialized in Python-
based automation (Pytest, Playwright, Behave, Selenium WebDriver) and modern AI-driven QA workflows (leveraging AI
agents and OpenAI APIs to accelerate testing cycles). Strong command of API verification, performance load testing (Locust),
database validation (PostgreSQL, MySQL), and comprehensive test planning across SDLC.

TECHNICAL SKILLS
Testing Types: Manual & Automation, API Testing, Performance/Load Testing, UI/UX, Exploratory, Cross-
Browser & Cross-Platform
Automation & API: Python, Pytest, Playwright, Behave, Selenium WebDriver, Requests, httpx, Locust, Postman,
Swagger, SoapUI
AI & Modern Tech: AI-Assisted Testing, Cline, OpenAI API Workflows
Databases & Tools: PostgreSQL, MySQL, MongoDB, Docker, GitHub, GitLab, Bitbucket, Jenkins, Datadog, Sentry,
Fiddler, DevTools
Management & OS: Jira, Kiwi TCMS, TestRail, Confluence, Scrum/Agile, Kanban, Windows, Linux, MacOS
Languages: English (Intermediate), Polish (Advanced+)

WORK EXPERIENCE
Senior QA Engineer 09/2025 – Present
Startup (Healthcare Industry) • Remote (Team: 3 Frontend, 3 Backend, 1 QA)
• Acting as sole QA Engineer, taking full ownership of QA processes, test planning, and software delivery quality.
• Actively leveraging modern AI tools (including Cline and OpenAI APIs) to accelerate test script generation, optimize
automation workflows, and analyze complex system logs.
• Building and maintaining robust API automated testing frameworks using Pytest + httpx.
• Conducting performance and load testing using Locust to ensure high system stability under heavy user loads.
• Performing rigorous manual testing of web and mobile apps, ensuring strict compliance with healthcare industry standards.
• Verifying data accuracy using PostgreSQL databases and managing bug tracking via Jira, GitHub, and Allure reports.

Senior QA Engineer 09/2023 – 08/2025
Freelance • Remote (Team: 2 Frontend, 1 Backend, 1 DevOps, 1 QA)
• Developed automated test suites for UI (Pytest + Playwright async) and API (Postman, Pytest + httpx).
• Executed cross-browser and cross-platform compatibility testing across Linux and Windows environments.
• Integrated automated test pipelines with CI/CD tools (Jenkins, GitHub Actions, GitLab CI) and generated comprehensive
test analytics in Allure and Jira.

Key Project: BulkSource (AMTOSS, Ltd)
Full-cycle SaaS management platform for bulk aggregate logistics in the USA. Tech stack: React, Express JS, Jest, Docker, Python
(Django), Azure, Prisma ORM, PostgreSQL.

Middle QA Engineer 03/2022 – 07/2023
AMTOSS, Ltd • Ukraine (Remote) (Team: 5 Frontend, 4 Backend, 2 QA)
• Analyzed customer requirements and designed functional, integration, localization, API, and UI test documentation (test
cases, checklists).
• Developed UI automation test suites using Behave + Selenium WebDriver + Python.
• Participated in Agile (Scrum/Kanban) ceremonies, collaborating closely with developers and stakeholders.

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Middle QA Engineer 04/2021 – 03/2022
Plan A • Ukraine (Remote) (Team: 6 Full-stack, 2 QA)
• Conducted end-to-end testing of web applications interacting with hardware devices and external terminals.
• Automated positive and negative test scenarios using Python automation frameworks (Behave, Playwright).

Key Project: FabiTrack/FabiCash
Gaming industry solutions for terminal/kiosk payments, data processing, and state financial reporting. Tech stack: C#, .NET, Docker,
PostgreSQL.

Middle QA Engineer 08/2019 – 04/2021
Business Process Technology • Ukraine (Office) (Team: 12 Devs, 2 QA)
• Tested complex API integrations between web/mobile applications and diagnostic IoT devices.
• Created automated performance load tests using Locust + Python and automated API requests (Postman, Requests).

Junior QA Engineer 02/2019 – 06/2019
Software Development Hub LLC • Ukraine (Office)
• Executed manual test scripts, reported software defects, and collaborated with developers to ensure bug resolution.

EDUCATION & COURSES
Specialist Degree (2003 – 2009): Kharkiv National Academy of Municipal Economy (Department of Architecture and
Landscape Design)
Professional Courses: QA Automation course at "OTUS" (2020) | QA Manual course at "QATestLab" (2019) | Full Stack
Web Development at "Posterum" (2016)

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