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K

Keketso S.

AI Data Labeller/Trainer

South Africa flagJohannesburg, South Africa

Key Skills

Software

Other
AppenAppen
ClickworkerClickworker
MercorMercor
Micro1
MindriftMindrift
OneFormaOneForma
TolokaToloka
TelusTelus
CloudFactoryCloudFactory
Label StudioLabel Studio
CVATCVAT
Data Annotation TechData Annotation Tech

Top Subject Matter

Large Language Models
AI Training & Quality Evaluation
AI Research

Top Data Types

TextText
AudioAudio
DocumentDocument

Top Task Types

ClassificationClassification
TranscriptionTranscription
Bounding BoxBounding Box
PolygonPolygon
SegmentationSegmentation
Entity (NER) ClassificationEntity (NER) Classification
Point/Key PointPoint/Key Point
Object DetectionObject Detection
Text GenerationText Generation
Question AnsweringQuestion Answering
Text SummarizationText Summarization
Fine-tuningFine-tuning
Evaluation/RatingEvaluation/Rating
Computer Programming/CodingComputer Programming/Coding
Data CollectionData Collection
Prompt + Response Writing (SFT)Prompt + Response Writing (SFT)
RLHFRLHF
Function CallingFunction Calling

Freelancer Overview

Data Annotator/Labeller. Brings 3+ years of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include Scale AI and Other. Education includes National Certificate Vocational, Maluti TVET College Lere La Tshepe Campus (2023). AI-training focus includes data types such as Text and Audio and labeling workflows including Classification and Transcription.

Labeling Experience

AI Trainer/Data Labeller

TextTextPrompt + Response Writing (SFT)Prompt + Response Writing (SFT)

spotting AI-generated images. Also looking at each image and the prompt it came from, mark the spots that give it away as AI, and briefly describe each. Comparing two AI-generated artifacts side by side, recording myself interacting with a data visualization on a third-party web page, then tagging each interaction against the playback. The tags here are normally the deliverables.

2025 - 2026

Transcriber

OtherAudioAudioTranscriptionTranscription

As a Transcriber at Way With Words SA, I transcribed and recorded over 50 hours of audio data for AI research projects. My transcription work aimed for data accuracy to support high-quality machine learning datasets. I ensured consistency and precision in all audio documentation. • Transcribed spoken audio files into structured text format. • Maintained a 98% accuracy rate throughout all assignments. • Supported AI training and machine learning research. • Recorded and reviewed audio segments to guarantee integrity.

2024 - 2024
Scale AI

Data Annotator/Labeller

Scale AIScale AITextTextClassificationClassification

As a Data Annotator/Labeller at Scale Labs AI, I labeled and categorized over 10,000 text data points, contributing to the accuracy and performance of large language models. My work directly influenced the training and refinement of LLMs such as Gemini and Deepseek. I provided targeted feedback on AI-generated responses to iteratively enhance output quality. • Annotated and classified diverse text datasets for machine learning training. • Delivered extensive feedback on AI model responses each week. • Collaborated with a global, remote annotation team. • Supported the launch of advanced language models through refined data labeling.

2024 - 2024

Education

M

Maluti TVET College Lere La Tshepe Campus

National Certificate Vocational, Information Technology

National Certificate Vocational
2020 - 2023

Work History

E

Education Sector

Administration Intern

Johannesburg
2025 - 2026
W

Way With Words SA

Transcriber

Cape Town
2024 - 2024