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J

James Wambui

AI Data Annotation Specialist | Data Labeling & Quality Evaluation

KENYA flag
Nairobi, Kenya
$30.00/hrIntermediateAppenImeritLabelbox

Key Skills

Software

AppenAppen
iMeritiMerit
LabelboxLabelbox

Top Subject Matter

AI Model Training
Natural Language Processing
AI Search Ranking

Top Data Types

TextText
VideoVideo

Top Task Types

Bounding Box
Text Generation
Transcription
Evaluation Rating
Prompt Response Writing SFT
Classification
Object Detection
Text Summarization
Data Collection
Segmentation
Question Answering

Freelancer Overview

AI Data Annotation Specialist | Data Labeling & Quality Evaluation. Brings 2+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Prolific, Internal, and Proprietary Tooling. Education includes Bachelor of Science, University of Nairobi (2024). AI-training focus includes data types such as Text and labeling workflows including Evaluation and Rating.

IntermediateEnglishSwahili

Labeling Experience

AI Data Annotation Specialist | Data Labeling & Quality Evaluation

Text
As an AI Data Annotation Specialist at Prolific, I performed data annotation and labeling on text-based datasets for machine learning models. My responsibilities included quality assurance of labeled data, evaluating AI-generated content, and refining annotation guidelines. I prepared and validated datasets, collaborating across teams to meet strict deadlines. • Labeled and evaluated text data for natural language processing tasks. • Conducted quality assurance to ensure labeling consistency and accuracy. • Participated in refining and documenting data labeling methodologies. • Maintained high productivity and quality benchmarks in annotation workflows.

As an AI Data Annotation Specialist at Prolific, I performed data annotation and labeling on text-based datasets for machine learning models. My responsibilities included quality assurance of labeled data, evaluating AI-generated content, and refining annotation guidelines. I prepared and validated datasets, collaborating across teams to meet strict deadlines. • Labeled and evaluated text data for natural language processing tasks. • Conducted quality assurance to ensure labeling consistency and accuracy. • Participated in refining and documenting data labeling methodologies. • Maintained high productivity and quality benchmarks in annotation workflows.

2025 - 2026

Search Query Evaluation & AI Model Training Project

Text
In my Search Query Evaluation & AI Model Training portfolio project, I simulated workflows for evaluating search engine results. I analyzed and labeled search queries for relevance based on user intent and structured guidelines. This involved categorizing results and documenting the methodology for training AI ranking systems. • Created and labeled 100+ sample search queries aligning with AI training standards. • Applied a structured rating framework to assess result relevance. • Conducted online research to verify content credibility before assigning ratings. • Produced detailed documentation of the evaluation and labeling process.

In my Search Query Evaluation & AI Model Training portfolio project, I simulated workflows for evaluating search engine results. I analyzed and labeled search queries for relevance based on user intent and structured guidelines. This involved categorizing results and documenting the methodology for training AI ranking systems. • Created and labeled 100+ sample search queries aligning with AI training standards. • Applied a structured rating framework to assess result relevance. • Conducted online research to verify content credibility before assigning ratings. • Produced detailed documentation of the evaluation and labeling process.

2024 - 2025

Education

U

University of Nairobi

Bachelor of Science, Computer Science

Bachelor of Science
2021 - 2024

Work History

A

Appen

Account Manager

Miami
2024 - 2025
U

Upwork

Freelance Transcriptionist

Florida
2024 - 2025