Kelvin N.

Key Skills

Software

Labelbox

Mercor

Top Subject Matter

Prompt engineering

NLP dataset annotation

Writing and QA industry

Top Data Types

Text

Document

Image

Top Task Types

Transcription

Question Answering

Object Detection

Classification

Evaluation/Rating

Prompt + Response Writing (SFT)

Data Collection

Text Summarization

Text Generation

Freelancer Overview

AI Data Trainer / Model Evaluator (Freelance, Remote). Brings 3+ years of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include N and A. Education includes Bachelor of Science, Kenyatta University (2019). AI-training focus includes data types such as Text and labeling workflows including RLHF and Entity (NER) Classification.

Labeling Experience

AI Data Trainer / Model Evaluator (Freelance, Remote)

TextRLHF

Evaluated AI-generated responses for accuracy, relevance, and safety to support RLHF training and model improvement. Ranked and analyzed model outputs to identify issues and guide preference learning. Performed quality assessment by detecting hallucinations, bias, and factual errors in response content. • Ranked outputs for RLHF training • Detected hallucinations, bias, and factual inaccuracies • Designed prompt tests for reasoning and instruction-following • Assessed responses for safety and overall quality

2024 - Present

Data Annotation Specialist (Contract, Remote)

TextEntity (NER) Classification

Annotated NLP datasets including classification, sentiment analysis, and entity recognition. Followed labeling standards and applied quality assurance processes to maintain consistency across labeled data. Contributed to dataset quality by ensuring labels were accurate and reliable for downstream NLP tasks. • Labeled data for classification and sentiment analysis • Performed entity recognition (NER) annotation • Maintained consistency and accuracy via QA • Ensured high-quality labeling across remote datasets

2024 - 2025

Education

Work History