Ray Mbani

Key Skills

Software

CloudFactory

Sama

Remotasks

Clickworker

CVAT

Hasty

Labelbox

OneForma

Roboflow

Scale AI

Telus

Toloka

CrowdSource

Appen

Top Subject Matter

Computer Vision

Nlp Domain Expertise

Autonomous Systems

Top Data Types

Image

Text

Document

Top Task Types

Bounding Box

Segmentation

Polygon

Cuboid

Polyline

Text Generation

Transcription

Data Collection

Text Summarization

Object Detection

Classification

Question Answering

Freelancer Overview

I am a seasoned Data Labeling and AI Training Data Specialist with over 10 years of experience supporting the development of high-performing artificial intelligence and machine learning models. Throughout my career with industry leaders such as CloudFactory, Sama (Samasource), and Remotasks, I have contributed to the preparation of high-quality datasets across diverse domains, including computer vision, natural language processing, and autonomous systems. My expertise spans image, video, text, audio, and LiDAR annotation, utilizing techniques such as bounding boxes, semantic segmentation, polygon annotation, classification, transcription, and content moderation. I am proficient in leading annotation platforms including CVAT, Labelbox, SamaHub, and Remotasks, consistently delivering accurate and reliable data that meets stringent quality standards. What sets me apart is my strong leadership background and commitment to excellence in AI data operations. As an Annotation Team Leader, I have successfully trained, mentored, and supervised teams, ensuring productivity, efficiency, and adherence to client specifications. I have maintained accuracy rates exceeding 98% while optimizing workflows and meeting tight deadlines. My contributions include supporting projects in object detection, sentiment analysis, chatbot training, and data validation for autonomous technologies. With a keen eye for detail, exceptional quality assurance skills, and a deep understanding of ethical AI development, I bring both technical expertise and strategic value to organizations seeking dependable and scalable AI training data solutions.

Labeling Experience

Annotation Team Leader – CloudFactory

CloudfactoryImageBounding Box

Managed and led annotation teams for image, video, and text data labeling projects for machine learning and NLP models. Oversaw quality control, accuracy validation, and deadline compliance for global clients. Trained and mentored team members in annotation tools and best practices. • Utilized annotation platforms such as Labelbox and CVAT. • Implemented segmentation and classification tasks. • Conducted regular quality assurance reviews. • Improved team output by optimizing processes.

Managed and led annotation teams for image, video, and text data labeling projects for machine learning and NLP models. Oversaw quality control, accuracy validation, and deadline compliance for global clients. Trained and mentored team members in annotation tools and best practices. • Utilized annotation platforms such as Labelbox and CVAT. • Implemented segmentation and classification tasks. • Conducted regular quality assurance reviews. • Improved team output by optimizing processes.

2020 - 2025

Team Leader & Senior Data Annotator – Sama (Samasource)

SamaImageBounding Box

Managed and annotated large-scale image, video, and text datasets for AI applications, focusing on bounding boxes, segmentation, and transcription. Ensured adherence to annotation guidelines and performed validation checks on completed tasks. Supervised and trained annotation teams for quality and compliance. • Utilized Sama annotation platform and proprietary tools. • Contributed to data preparation for AI training and testing. • Conducted audits to verify label accuracy. • Implemented structured team workflows.

Managed and annotated large-scale image, video, and text datasets for AI applications, focusing on bounding boxes, segmentation, and transcription. Ensured adherence to annotation guidelines and performed validation checks on completed tasks. Supervised and trained annotation teams for quality and compliance. • Utilized Sama annotation platform and proprietary tools. • Contributed to data preparation for AI training and testing. • Conducted audits to verify label accuracy. • Implemented structured team workflows.

2017 - 2020

Senior Data Annotator – Remotasks

RemotasksImageSegmentation

Provided detailed annotation and labeling for machine learning and AI model training datasets, including image segmentation, object detection, and LiDAR annotation. Delivered accurate labeling and classification across diverse large datasets. Participated in continuous training programs to stay current with annotation standards. • Utilized Remotasks and proprietary annotation tools. • Performed object detection and image segmentation tasks. • Maintained high standards of accuracy. • Labeled datasets supporting computer vision and autonomous systems.

Provided detailed annotation and labeling for machine learning and AI model training datasets, including image segmentation, object detection, and LiDAR annotation. Delivered accurate labeling and classification across diverse large datasets. Participated in continuous training programs to stay current with annotation standards. • Utilized Remotasks and proprietary annotation tools. • Performed object detection and image segmentation tasks. • Maintained high standards of accuracy. • Labeled datasets supporting computer vision and autonomous systems.

2014 - 2017

Education

Work History