Олександр

Oleksandr Mikheiev
Data Annotation / Markup Specialist

Contact Summary
Detail-oriented Data Labeling Specialist with experience in data
Phone
annotation and markup tasks. Focused on accuracy, consistency, and
[open contact info](look above in the "contact info" section)
following instructions. Experienced in working with text-based data
and delivering high-quality results. Quick to learn new tools and able
Email to work independently while meeting deadlines.
[open contact info](look above in the "contact info" section)

Skills Experience

Data Annotation / Markup Specialist May 2023 - Oct 2025
Data labeling & annotation
Mbit Consultants
Quality control (QA basics)
Performed data labeling and annotation tasks according to project
Following complex guidelines guidelines
Reviewed and corrected annotations to ensure high accuracy and
Time management consistency
Worked with text-based datasets, identifying and categorizing key
High attention to detail information
Followed strict annotation rules and updated tasks based on
Accuracy & consistency feedback from QA reviewers
Collaborated with team members to maintain data quality
standards and meet deadlines

Language Education

English Applied mechanics - Bachelor's Degree
Intermediate National Technical University of Ukraine “Igor Sikorsky Kyiv
Polytechnic Institute”
Ukrainian
Native 2019 - 2023 Kyiv, Ukraine

Certifications Accomplishments
Certified Software Tester Contributed to identifying and fixing a significant number of errors
Certificate ID: UC-706ed7f8-8af4-4590-b2f1- during SDS document testing and data validation tasks at Helacloud
52d0ab16649f
Supported improvement of AI model performance through
Verification link: ude.my/UC-706ed7f8-8af4-
4590-b2f1-52d0ab16649f structured data markup and quality feedback
Document No: 0004 Played a role in the successful testing and launch of MBOT by
Software Testing 101 — Coursera (2023) improving invoice data accuracy and detecting system issues
Improve Your English Communication Skills Worked with multilingual invoice datasets, ensuring correct
— Coursera (2023) annotation and consistency across different formats
Java Fundamentals Course — Javarush (2020) Successfully completed Bachelor’s degree in Applied Mechanics with
strong academic performance