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Palesa Kosa

Data Annotator

South Africa flagVereeniging, South Africa
$9.00/hrIntermediateLabelboxOther

Key Skills

Software

LabelboxLabelbox
Other

Top Subject Matter

General AI/ML
Legal Services & Contract Review
Regulatory Compliance & Risk Analysis

Top Data Types

TextText
VideoVideo
DocumentDocument

Top Task Types

ClassificationClassification
Bounding BoxBounding Box
Question AnsweringQuestion Answering
RLHFRLHF
Text SummarizationText Summarization
Evaluation/RatingEvaluation/Rating

Freelancer Overview

I have spent the last few years deeply involved in the world of AI, working as a Data Annotator and Advanced Data Trainer for companies like RWS and Invisible Technologies. My daily work involves more than just tagging; I focus on teaching AI systems how to understand the nuances of text, audio, and video through careful, ethical reasoning. I really enjoy the challenge of spotting complex edge cases and inconsistencies, as I know these small details are what ultimately make a machine learning model truly reliable and smart.

IntermediateEnglish

Labeling Experience

Data Annotator

OtherVideoBounding Box
As a Data Annotator at RWS, I was responsible for accurately tagging text, audio, images, and videos to train AI models. I collaborated closely with project managers, linguists, and engineers to ensure annotation quality and clarity. My focus was on meeting project requirements and delivering high-quality labeled data to support reliable AI outcomes. • Tagged diverse data types including text, audio, images, and video • Ensured consistent application of annotation standards • Supported AI and machine learning model improvement • Reviewed and clarified annotation rules with stakeholders

As a Data Annotator at RWS, I was responsible for accurately tagging text, audio, images, and videos to train AI models. I collaborated closely with project managers, linguists, and engineers to ensure annotation quality and clarity. My focus was on meeting project requirements and delivering high-quality labeled data to support reliable AI outcomes. • Tagged diverse data types including text, audio, images, and video • Ensured consistent application of annotation standards • Supported AI and machine learning model improvement • Reviewed and clarified annotation rules with stakeholders

2025 - 2026

Advanced AI Data Trainer

OtherTextRLHF
As an Advanced AI Data Trainer at Invisible Technologies, I curated and evaluated large datasets to train and guide AI system behaviors. I applied advanced reasoning to improve the ethical and reliable performance of models and proactively identified patterns and inconsistencies for robust AI development. My efforts ensured that outputs aligned with project objectives and maximized model quality. • Trained AI with structured data labeling and evaluation • Utilized subject matter expertise in annotation and model tuning • Detected inconsistencies and edge cases in datasets • Emphasized ethical and goal-aligned data curation

As an Advanced AI Data Trainer at Invisible Technologies, I curated and evaluated large datasets to train and guide AI system behaviors. I applied advanced reasoning to improve the ethical and reliable performance of models and proactively identified patterns and inconsistencies for robust AI development. My efforts ensured that outputs aligned with project objectives and maximized model quality. • Trained AI with structured data labeling and evaluation • Utilized subject matter expertise in annotation and model tuning • Detected inconsistencies and edge cases in datasets • Emphasized ethical and goal-aligned data curation

2024 - 2024

Education

U

University of South Africa

Bachelor of Laws, Law

Bachelor of Laws
2019 - 2022
S

Steynsrus High School

Matric - Grade 12, General Studies

Matric - Grade 12
2011 - 2011

Work History

N

NYS: Youth Life

Team Leader

Free State
2025 - 2026
K

Kusasalethu Law Chambers

Legal Assistant

Free State
2022 - 2023