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OLESIA KOSTIKOVA
General QA Engineer – Mobile, Web, API & Backend Testing
[open contact info](look above in the "contact info" section) | LinkedIn | https://github.com/alikos2211 | [open contact info](look above in the "contact info" section) | Telegram: alikos2211

PROFILE

General QA Engineer with 3+ years of experience testing mobile and backend systems for retail software products. Experienced in
functional, regression, smoke, and integration testing, validating REST APIs, FastAPI services, and data in PostgreSQL and
MongoDB. Skilled in debugging issues through logs and monitoring in Datadog and Google Cloud Platform. Comfortable working in
Git-based workflows and CI/CD pipelines, and used to collaborating closely with developers, designers, and product managers to
find root causes, verify fixes, and ship reliable software. Experienced in writing Python scripts and automated tests to speed up
regression and data validation.

CORE EXPERTISE
• Comprehensive testing - functional, regression, smoke, sanity, exploratory, integration, end-to-end, and acceptance testing
• Mobile testing - iOS and iPad applications, including UI/UX, device compatibility, different screen sizes, orientations, and OS
versions
• Languages & scripting - Python, JavaScript
• API testing - validating REST APIs, request/response payloads, status codes, authentication, data integrity, and error handling
• Manual test execution - designing test scenarios, creating test cases, executing test plans, and identifying edge cases
• Log analysis and debugging - investigating application behavior, analyzing errors, and troubleshooting issues using Datadog and
Google Cloud Platform
• UI/UX validation - testing interfaces against design specifications, Figma prototypes, and product requirements
• Technical documentation - creating and maintaining test plans, test cases, bug reports, test documentation, and QA reports
• Bug lifecycle management - identifying, documenting, prioritizing, tracking, and verifying defects through resolution
• Cross-functional collaboration - working closely with developers, designers, and product managers to ensure product quality and
consistency
• Working with PostgreSQL and MongoDB, validating data integrity, executing queries, verifying database records, and checking
data consistency between application and database layers

PROFESSIONAL EXPERIENCE

General QA Engineer | 05/2023 – 10/2026
CloudWorks | Kharkiv, Remote

Project 1: Point of Sale (POS) Platform (iOS – iPhone & iPad)

• A comprehensive retail technology platform integrating Point of Sale (POS), RFID, AI-powered capabilities, and omnichannel
functionality into a unified ecosystem
• Wrote Python, JS scripts or automated API tests (pytest, requests, Playwright, etc.) to cover regression and smoke scenarios
• Tested RFID-related workflows and verified product identification, tracking, and data consistency
• Analyzed API requests, responses, and network communication using Proxyman
• Validated backend data and database records using PostgreSQL
• Tested backend services built with FastAPI and monitored application behavior through DataDog
• Executed functional, regression, smoke, integration, and requirements-based testing
• Reported, tracked, and retested defects using Jira, collaborating with developers and business analysts.

Project 2: Retail Staff iOS Application

• A mobile application designed to support retail employees with daily store operations, product management, store navigation,
task planning, and employee scheduling
• Conducted functional, regression, smoke, and requirements-based testing
• Designed, maintained, and executed test cases and test suites in TestRail
• Automated repetitive checks or test-data setup with scripts
• Performed API testing using Postman and Swagger, validating REST API endpoints, request/response structures, status codes,
and data consistency
• Used Proxyman to inspect and analyze network traffic, API requests, and responses between mobile applications and backend
services
• Validated backend data and database operations using MongoDB
• Monitored application performance, errors, and logs using Google Cloud Platform
• Used Jira for defect reporting and tracking, Confluence for test documentation, and Figma for UI and design validation
• Used Git for version control and Bitrise to support understanding and validation of mobile CI/CD build and release workflows
JavaScript Camp | 08/2022 – 01/2023
Sigma Software’s | Kharkiv, Remote
• Successfully completed an intensive JavaScript training program focused on Front-End development
• Gained practical experience with JavaScript, HTML, CSS, and modern frontend development concepts
• Developed an understanding of React and component-based application development

EDUCATION

Master's Degree, System Analysis | 09/2024 – 01/2026
Kharkiv National University of Radioelectronics

Bachelor's Degree, Software Engineering | 09/2020 – 06/2024
Kharkiv National University of Radioelectronics
Coursework: Software Engineering Principles, Object-Oriented Programming, Probability Theory, Mathematical Statistics, Numerical Methods,
Data Structures & Algorithms, Programming

COURSES

Applied Data Science with Python Specialization - University of Michigan
Applied Social Network Analysis in Python - University of Michigan

PUBLICATIONS

USING AI TO IDENTIFY SHIPS IN SATELLITE IMAGES | Materials
ІX-th International scientific-technical conference Computer Modeling And Optimization Of Complex Systems

SKILLS

Testing & QA: Manual Testing, Automation testing, Functional Testing, Regression Testing, Smoke Testing, Integration Testing,
Requirements Testing, API Testing, UI Testing, End-to-End Testing, Test Case Design & Execution, Bug Reporting, A/B testing
API & Network Testing: Postman, Swagger, Proxyman, REST API, FastAPI
Databases & Monitoring: PostgreSQL, DataDog, MongoDB, SQL
Test Management & Collaboration: TestRail, Jira, Confluence, Figma, SDLC, STLC, Agile/Scrum, Test Planning, Test Design,
Test Execution, Defect Life Cycle, Test Reporting
Programming & Web Technologies: Python, JavaScript, React, HTML, CSS, SCSS, SASS, GitLab CI/CD, Playwright, Selenium
Other Tools: Git, GitLab, FastAPI, SQL, Streamlit, Bitrise

LANGUAGES

English: Upper Intermediate | Ukrainian: Fluent | Russian: Fluent