David Maragia - AI Data Annotation & Evaluation Support

Key Skills

Software

Appen

Clickworker

Toloka

Surge AI

Remotasks

Mercor

Top Subject Matter

General AI Data Annotation & Evaluation

Legal Services & Contract Review

Regulatory Compliance & Risk Analysis

Top Data Types

Text

Computer Code Programming

Document

Top Task Types

Classification

Entity (NER) Classification

Segmentation

Text Generation

Question Answering

Text Summarization

Transcription

Evaluation/Rating

Data Collection

Prompt + Response Writing (SFT)

Computer Programming/Coding

Freelancer Overview

Having more than 5 years of experience in data analysis, validation, and quality assurance, I have developed a solid background that can be directly applied to the workflows of AI training data. As a freelance consultant, I have assisted AI-related projects such as data structuring, labeling readiness, and evaluation support to clients worldwide. My experience in data cleaning, validation, and quality assurance means that datasets that I work with are of high accuracy, which is essential to effective model training. My technical literacy and practical skills to operate with confidence in AI data pipelines are due to my academic background in Applied Computer Science and ongoing training in Python. My unique skill is that I have both quantitative and qualitative data handling expertise, which is a rare combination in AI annotation work. My work experience at Concern Worldwide and Strathmore University taught me to be very strict in attention to detail when handling complex datasets with strict accuracy and integrity requirements, including donor-grade reporting requirements. I have experience in structured documentation, research writing, and workflow optimization, which directly translate into generating consistent, high-quality labeled data outputs. My proven remote work performance and fast adaptability to new tools and AI systems make me a reliable and efficient contributor to any data labeling or AI training project.

IntermediateEnglishSwahili

Labeling Experience

AI Data Structuring & Labeling Readiness for Global Clients

TextPrompt Response Writing SFT

While working with global clients as an independent consultant, I supported AI-related tasks including preparing raw datasets for labeling pipelines, organizing unstructured data into clean, structured formats ready for annotation. This involved defining data categories, flagging ambiguous entries, and ensuring consistency across large datasets to meet model training requirements.

2019 - Present

Academic Research Dataset Cleaning, Validation & Structuring

DocumentEvaluation Rating

I cleaned and analyzed academic research datasets using SPSS and Excel, removing errors, resolving inconsistencies, and standardizing formats. This quality assurance work closely mirrors the validation and review stages in professional data annotation workflows.

2019 - 2023

Qualitative Data Coding & Annotation for Humanitarian Research

TextEntity Ner Classification

I analyzed qualitative and quantitative data from field research for development and humanitarian programs. This included coding open-ended survey responses, validating field data, and ensuring data integrity for donor reporting, skills that map directly onto text annotation and classification tasks in AI training.

2017 - 2018

Education

K

Kiambu Institute of Science and Technology

Certificate, Python Programming

Certificate

2019 - 2019

K

Kenyatta University

Master of Business Administration, Strategic Management

Master of Business Administration

2019 - 2019

Work History

I

Independent Contractor

Executive Assistant / Operations & Research Coordinator

Nairobi

2019 - Present

S

Strathmore University

Project Assistant (Research & Administration)

Nairobi

2019 - 2023