Сергей

SERGII SHERSHNOV

Software Quality Assurance Engineer

(Remote, B2B) Or Relocation

EU (Poland/Croatia)
T: [відкрити контакти](див. вище в блоці «контактна інформація»)
E: [відкрити контакти](див. вище в блоці «контактна інформація»)

Professional summary:

I am an experienced Software Quality Assurance Engineer with over 5 years of
hands-on experience in both manual and automated testing of web and mobile
applications. My professional journey has equipped me with deep expertise in
ensuring software quality across complex systems, focusing on functionality,
usability, and performance.
My core strengths include a solid understanding of the Software Development Life
Cycle (SDLC), detailed test planning, and business requirements analysis. I am
adept at creating comprehensive test cases and executing test plans that cover a
wide range of scenarios, from standard user flows to edge cases. I pay special
attention to details that impact the end-user experience and system reliability.
In the past few years, I have focused heavily on test automation, specializing in
Python-based tools such as Pytest, Playwright, Behave, and Selenium
WebDriver. I develop reliable and maintainable automated test suites for both UI
and API layers, helping teams reduce regression risks and accelerate delivery
cycles. I also conduct manual exploratory testing, UI validation, and data integrity
verification to complement automated efforts.
I have a solid background in API testing, both manual (using Postman) and
automated, ensuring backend logic works as expected and integrates seamlessly
with frontend components. I’m also experienced in performance testing using
Locust, with the ability to simulate various load scenarios and identify bottlenecks
before release.
A key advantage I bring is the ability to work effectively across platforms. I’ve
executed tests in Linux, Windows, adapting tools and strategies to meet platform-
specific constraints.

Skills:

● Testing Web, Mobile and Desktop applications, ● Reliability,
also devices ● Communication skills,
● Automation testing frameworks: Behave + ● Responsibility,
 WebDriver + Python, Playwright, Locust, ● Attentiveness to detail,
Requests, Postman. ● Self-motivated,
● Testing DB: MySQL, PostgreSQL ● Persistence,
● Using API Documentation: Swagger ● Interpersonal skills
● Using IDE: PyCharm, Sublime-text
● Testing tools: Dev tools of the browser,
Postman, Fiddler, Data dog, SoapUI,
Sentry
● Tools for working with branches: Docker,
GitHub
● Tools for writing test cases, test scenarios,
test plans: Kiwi TCMS
● Bugtracker: JIRA, GITLab, Pivotal, Mantis,
Github Issues
● Methodologies: Scrum, Kanban
● Photoshop, Google docs, Django
● English–Upper-intermediate, Polish – Advanced+
● Operating Systems: Windows, Linux, MacOS

Work Experience:

QA Engineer , 09/2023 to 05/2025
Freelance (Remote)

Responsibilities:

● Writing test documentation (test cases, bug report)
● Performing API automated testing (using Postman and Pytest + Playwright
API async)
● Creating and running UI tests (using Pytest + Playwright async)
● Manually testing of web, mobile apps
● Working with GitHub, GitLab, Bitbucket
● Analyzing test results and preparing test reports ( Jenkins, Allure, Jira)
● Working with databases (PostgreSQL) to verify data accuracy
● Conducting cross-browser and cross-platform testing to ensure compatibility
● Working on Linux, Windows environments
● Using PyCharm and Visual Studio IDE for development and test automation

QA Engineer, 03/2022 to 07/2023
AMTOSS, Ltd - Ukraine (Remote)

Responsibilities:

● Performing analysis of customer requirements.
● Planning, designing and performing different kinds of testing: functional,
integration, localization, API, UI and usability (web, desktop applications).
● Preparing and running test documentation: test cases, checklists.
● Identifying bugs and reporting them to the bug tracking system.
● Involved in front-end and back-end testing.
 ● Preparing and updating the project knowledge base for team members.
● Сommunicating with team members.
● Performing API testing.
● Analyzing and reporting of problems identified by the customer.
● Writing UI automation testing (Behave+WebDriver+Python).
● Working in Agile (Scrum, Kanban) teams, participating in daily stand-ups,
sprint planning, and retrospectives

QA Engineer, 04/2021 to 03/2022
Plan A - Ukraine (Remote)

Responsibilities:

● Prepared and ran test documentation: test cases, checklists, release notes
● Verified and reported defects to the bug tracking system, which further lead to
system
● Processed problems found by the customer
● Communicated with foreign customers and staff
● Tested front-end and back-end interaction
● Automated of positive and negative test cases (Behave+WebDriver+Python,
Playwright)
● Prepared and updated the project knowledge base for team members.
● Automated API requests (Postman, Requests)
● Planned, designed and performed different kinds of testing: functional,
integration, localization, API, UI and usability (Interaction between web
application and devices)
● Checked the interaction of the web application with the database

QA Engineer, 08/2019 to 04/2021
Business Process Technology - Ukraine (Office)

Responsibilities:

● Created and updated test cases, checklists according to customer
requirements
● Reported defects to the bug tracking system
● Communicated with customers to resolve issues related to the devices and the
interaction of devices with the web application and cell phones
● Communicated with different departments related to web and mobile app
development
● Tested of API interaction of multiple applications and devices
● Planned, designed and performed different kinds of testing: functional,
integration, localization, API, UI and usability
● Worked with database (Interaction between web application, mobile application
and diagnostic devices)
● Created and verified of UI by automating processes
 ● Wrote load testing (Locust+Python)
● Automated API requests (Postman, Requests)

QA Engineer, 02/2019 to 06/2019
Software development Hub LLC - Ukraine (Office)

Responsibilities:

● Wrote and tested software by test cases and checklists
● Reported and verified defects to the bug tracking system
● Communicated with staff
● Analyzed the data received from the client and describe them in the relevant
documents for discussion with the development team

Most Recent Project:
BulkSource (AMTOSS, Ltd)
Brand new full-cycle management system for the premier provider of bulk aggregate
and logistics services in the Midwest region with the potential to extend to the whole
USA. The SaaS platform provides advanced flow for ordering and delivery of bulk
aggregate materials.

Software stack details:
● React
● Express JS
● Jest
● Docker
● Python (Django)
● Microsoft Azure, Azure Cloud Shell, Azurite
● Prisma ORM
● Postgres SQL
● Kanban Methodology

My role on the project: Quality Assurance Engineer

FabiTrack/FabiCash (Plan A)

Projects are used for the gaming industry. The main functions are payment via
terminals, kiosks, data processing, interaction between web projects and mobile
applications as well as financial reporting to various governmental organizations.

Software stack details:
● C#
● .NET
● Docker
 ● Amazon Relational Databases
● PostgreSQL
● Scrum Methodology

My role on the project: Quality Assurance Engineer

WebWellness, VipVip (Business Process Technology)

Interaction with diagnostic devices and processing of results and data analysis. The
company is also actively developing mobile applications for communication with
manufactured devices, hidden chats and web applications that are used for
accounting and warehousing

Software stack details:
● React
● PHP
● Docker
● Microsoft Azure, Azure Cloud Shell, Azurite
● MongoDB
● MySQL
● Kanban Methodology

My role on the project: Quality Assurance Engineer

Education:
Specialist Degree: 2003-2009
Kharkiv National Academy of Municipal Economy (Department of Architecture and
Landscape Design)
Courses:
Full Stack Web Development course at “Posterum” - 2016
QA (manual) course at “QATestLab” - 2019
QA (automation) course at "OTUS" - 2020