Kelvin Mbugua

Key Skills

Software

CloudFactory

CVAT

Lionbridge

OneForma

Other

Top Subject Matter

No subject matter listed

Top Data Types

Image

3D Sensor

Video

Audio

Medical Dicom

Top Label Types

Bounding Box

Cuboid

Segmentation

Transcription

Classification

Tracking

Freelancer Overview

I am a detail-oriented professional with hands-on experience in data annotation, labeling, and quality assurance, gained through roles at Samasource and various freelance projects. My background includes working with both text and image datasets, performing large-scale data labeling, validation, and error reviews to ensure high accuracy and consistency for AI training data. I am skilled in using tools such as SQL, Zoho Creator, and REST APIs, and have contributed to projects in domains like e-commerce and inventory management. My technical expertise in C#, .NET, and web development, combined with my commitment to data quality and process improvement, enables me to deliver reliable results in fast-paced, data-driven environments.

Labeling Experience

CVAT

CVATImageBounding BoxCuboid

In this project, I annotated LiDAR point clouds using 3D bounding boxes (cuboids). Each frame contained thousands of points representing objects and surfaces in a 3D environment, including roads, vehicles, pedestrians, cyclists, and static infrastructure.

In this project, I annotated LiDAR point clouds using 3D bounding boxes (cuboids). Each frame contained thousands of points representing objects and surfaces in a 3D environment, including roads, vehicles, pedestrians, cyclists, and static infrastructure.

2025 - 2025

Generalist

ImeritMedical DicomBounding BoxClassification

I worked on annotating medical data to support the development of machine learning models used in clinical decision support systems and medical research. The project involved labeling and reviewing various types of healthcare data, including medical images and structured clinical information.

I worked on annotating medical data to support the development of machine learning models used in clinical decision support systems and medical research. The project involved labeling and reviewing various types of healthcare data, including medical images and structured clinical information.

2025 - 2025

Atlas Capture

OtherVideoSegmentation

At Atlas Capture, my role focused on annotating video data to help train models for object detection, tracking, and scene understanding. Unlike simple image labeling, video segmentation required frame-by-frame precision and consistency to ensure objects were accurately labeled throughout motion sequences.

At Atlas Capture, my role focused on annotating video data to help train models for object detection, tracking, and scene understanding. Unlike simple image labeling, video segmentation required frame-by-frame precision and consistency to ensure objects were accurately labeled throughout motion sequences.

2025 - 2025

AVALA

CloudfactoryImageBounding Box

I worked on a computer vision data annotation project where our goal was to detect and classify vehicles in urban traffic footage. The client was building a machine learning model for traffic monitoring and smart city applications, so accurate vehicle detection was critical.We had a project size of at least 300 labellers.

I worked on a computer vision data annotation project where our goal was to detect and classify vehicles in urban traffic footage. The client was building a machine learning model for traffic monitoring and smart city applications, so accurate vehicle detection was critical.We had a project size of at least 300 labellers.

2025 - 2025

RWS

LionbridgeAudioTranscription

In this role, I carefully listened to audio recordings and transcribed conversations, interviews, and other spoken content with a high level of accuracy. I ensured proper grammar, punctuation, and formatting while maintaining the original meaning and context of the material. My responsibilities included:

In this role, I carefully listened to audio recordings and transcribed conversations, interviews, and other spoken content with a high level of accuracy. I ensured proper grammar, punctuation, and formatting while maintaining the original meaning and context of the material. My responsibilities included:

2024 - 2025

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Education

Work History