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H

Hiram Mwangi

AI Prompting and Data Annotation Specialist

Kenya flagNairobi, Kenya
$25.00/hrIntermediateLabelboxRemotasks

Key Skills

Software

LabelboxLabelbox
RemotasksRemotasks

Top Subject Matter

Artificial Intelligence - Data Annotation and Prompting
Software Development - Full Stack Development
E-commerce - customer support

Top Data Types

Computer Code ProgrammingComputer Code Programming
ImageImage

Top Task Types

Computer Programming Coding
Prompt Response Writing SFT
Evaluation Rating
Transcription
Classification
Data Collection

Freelancer Overview

I have practical experience of working with AI training data by performing data labeling, data annotation, and data validation on both text and structured data. I also pay attention to precision, consistency, and good compliance with guidelines, which are essential to develop trustworthy machine learning models. I do a lot of classifying data, assigning tags, cleaning data, and perusing outputs to get the high-quality ground truth. I am at ease dealing with edge cases and ambiguous inputs, which assist in enhancing model resilience. In addition to labeling, I can offer a solid technical experience in full-stack development, databases, and JavaScript. This will enable me to see how training data is incorporated into bigger AI systems. I have done structured systems with complicated schema and real time data handling which makes me keen on detail and integrity of data. I think logically and document decisions, which is why I remain consistent when working with large datasets, unlike other participants of AI training processes.

IntermediateEnglishSwahili

Labeling Experience

Text prompting and solving chemistry problems

TextPrompt Response Writing SFT
I worked on prompting and chemistry-focused AI training tasks where I created domain-specific questions and evaluated AI-generated responses. This included writing prompts to test model reasoning, solving chemistry problems, and reviewing outputs for accuracy, logic, and scientific correctness. I also ranked responses and gave structured feedback to improve model performance. These tasks required strong analytical thinking, subject knowledge in chemistry, and precision in assessing reasoning quality.

I worked on prompting and chemistry-focused AI training tasks where I created domain-specific questions and evaluated AI-generated responses. This included writing prompts to test model reasoning, solving chemistry problems, and reviewing outputs for accuracy, logic, and scientific correctness. I also ranked responses and gave structured feedback to improve model performance. These tasks required strong analytical thinking, subject knowledge in chemistry, and precision in assessing reasoning quality.

2025 - 2026

Image annotation

ImageSegmentation
I worked on image annotation tasks where I analyzed visual data and provided structured descriptions or labels to train AI vision models. This involved identifying objects, contexts, and relationships within images, then writing accurate and consistent annotations based on strict guidelines

I worked on image annotation tasks where I analyzed visual data and provided structured descriptions or labels to train AI vision models. This involved identifying objects, contexts, and relationships within images, then writing accurate and consistent annotations based on strict guidelines

2024 - 2025

Education

J

Jomo Kenyatta University of Agriculture and Technology

Bachelor of Science, Business Computing

Bachelor of Science
Not specified

Work History

J

Jomo kenyatta university hospital

IT support

Kiambu
2025 - 2025