Оксана

OKSANA TSYMBALA

QA Engineer | AI Data Annotation Specialist

📍 Ukraine
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🇬🇧 English: B1 (Intermediate)
Professional Summary

QA Engineer with 2+ years of experience in manual software testing and over 5 years of experience
in AI data annotation, validation, and quality assurance for computer vision datasets. Experienced in
medical and sports AI projects involving polygon segmentation, object detection, object tracking,
video annotation, and AI model validation. Skilled in functional testing, API testing with Postman, bug
reporting, and Agile collaboration.

AI Data Annotation Specialist / Content Engineer

GlobalLogic | April 2021 – Present

Medical AI Project (Laparoscopic Surgery)

Responsibilities

• Annotated complex medical image datasets using polygon segmentation to support computer
vision and machine learning models.

• Produced high-quality annotations of anatomical structures in laparoscopic surgery images
following detailed medical annotation guidelines.

• Reviewed and validated AI-generated annotations to ensure dataset consistency and improve
model performance.

• Performed quality assurance of annotated datasets by identifying and correcting labeling
inconsistencies.

• Collaborated with AI-assisted annotation workflows and continuously maintained high
annotation accuracy.

• Worked with the Encord platform for annotation, validation, and dataset management.

Sports Computer Vision Project

Responsibilities

• Annotated sports video datasets for AI-powered computer vision systems.

• Performed object detection, object tracking, and video annotation across large-scale datasets.
• Validated AI-generated predictions and corrected annotation inaccuracies.

• Conducted quality reviews to ensure compliance with project annotation standards.

• Followed annotation guidelines while maintaining consistency across video datasets.
• Reported data inconsistencies and collaborated with internal teams to improve annotation quality.
Junior QA Engineer

NDA Project – Educational Platform | February 2021-April 2021

(Web, iOS, Android)
Responsibilities

Performed functional testing of web and mobile applications.
Executed regression, smoke, sanity, and exploratory testing.
Tested Student, Teacher, and Administrator user roles.
Created bug reports, checklists, and test scenarios.
Performed API testing using Postman and verified implemented features.

Junior QA Engineer
US Insurance Platform| February 2021-March 2021

Responsibilities

Executed functional, regression, smoke, and sanity testing.
Identified, documented, and verified software defects using Jira.
Created and maintained test documentation and checklists.
Collaborated with developers to ensure software quality before release.
Junior QA Engineer
Frenzoo (Hong Kong)| October 2020 - April 2021
Project: Fashion Empire (10M+ Downloads)
Responsibilities

Performed functional, regression, smoke, and sanity testing
Tested game play mechanics, UI functionality, and graphical assets.
Conducted usability testing to improve player experience.
Logged and tracked defects, collaborating with developers and artists to verify fixes.
Content Engineer
Competera | February 2015 – October 2020

Project: Retail Data Quality Platform

Responsibilities

Validated retail product data and pricing information.
Performed data quality verification and web research.
Ensured data consistency across large product datasets.
Retail Data Quality Project

TECHNICAL SKILLS
AI Data Annotation: Image Annotation | Video Annotation | Polygon Segmentation | Object Detection
| Object Tracking | Medical Image Annotation | Dataset Validation | Computer Vision
Manual QA: Functional | Regression | Smoke | Sanity | Exploratory | GUI | Usability | API Testing
(Postman) | Bug Reporting | Test Documentation
Tools: Encord | Jira | Confluence | Postman | Slack | CVAT
Methodologies: Agile | Scrum
Previous Experience

Legal Counsel

Lawyers Association

2009-2015

Tools:
Encord | Jira | Confluence | Postman | Slack | CVAT
EDUCATION
Logos IT Academy

QA Engineer (2021)
English Course (2021)
Lviv State University of Internal Affairs
Specialist Degree in Law (2008)
LANGUAGES

Ukrainian — Native
English — Intermediate (B1)