Obianuju N.

Key Skills

Software

Toloka

Other

Top Subject Matter

AI training data annotation for text classification and sentiment/relevance labeling

Quality assurance verification of text-based entries and support tickets

Top Data Types

Text

Image

Video

Top Task Types

Classification

Freelancer Overview

AI Data Annotator (Freelance) — Toloka & Handshake AI (Remote). Brings 2+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Toloka & Handshake AI, Internal, and Proprietary Tooling. Education includes Bachelor of Science, Nnamdi Azikiwe University (2022). AI-training focus includes data types such as Text and labeling workflows including Classification, Evaluation, and Rating.

Labeling Experience

AI Data Annotator (Freelance) — Toloka & Handshake AI (Remote)

TextClassification

Completed AI data annotation for text classification, sentiment analysis, and relevance rating tasks using provided labeling guidelines. Interpreted instructions carefully and applied consistent labeling decisions to support machine learning model development. • Followed complex guideline documents with precision and consistency • Labeled text data for classification, sentiment, and relevance ratings • Reviewed edge cases by critical reading and flagging ambiguities • Produced structured written feedback on quality and guideline clarity

2023 - 2024

Customer Service / QA Intern — IT Placement (On-site)

Text

Performed quality assurance checks on data entries and support tickets to verify accuracy and correctness of information. Assisted customer support operations using clear written and verbal communication while supporting data handling tasks. • Conducted QA verification of support tickets and data entries • Identified errors and ensured compliance with accuracy standards • Managed data logging, sorting, and information verification • Followed structured troubleshooting processes for basic technical issues

2022 - 2023

Education

Work History