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Stephen Wanyonyi

Stephen Wanyonyi

3d,lidar data annotation,Al labelling, Al training.

KENYA flag
Nairobi, Kenya
$10.00/hrExpertOther

Key Skills

Software

Other

Top Subject Matter

No subject matter listed

Top Data Types

3D Sensor

Top Label Types

Bounding Box
Polygon
Polyline
Segmentation
Cuboid

Freelancer Overview

I have hands-on experience in AI training data and Remotasks annotation, supporting machine learning teams by producing accurate, consistent, and guideline-compliant labels across text, image, and audio tasks. My work has included content categorization, bounding boxes, segmentation, intent and entity tagging, transcription, and evaluation of model responses. I’m comfortable working with evolving instructions, handling edge cases, and maintaining strong productivity while meeting strict quality thresholds. What sets me apart is my attention to detail, fast learning speed, and commitment to high inter-annotator agreement. I regularly self-audit my work, adapt quickly to new project requirements, and communicate uncertainties clearly to ensure alignment with client expectations. I’m reliable with deadlines, receptive to feedback, and motivated by the impact high-quality data has on building accurate and responsible AI systems.

ExpertEnglishSwahili

Labeling Experience

3d/2d Lidar Annotation

Other3D SensorBounding BoxPolygon
In my Remotasks work, I contributed to a range of AI training data initiatives involving image, text, and audio annotation. The scope of projects included bounding box and polygon annotation, semantic segmentation, content categorization, entity and intent tagging, transcription, and evaluation of model-generated outputs. Tasks were performed according to detailed client guidelines, often requiring careful interpretation of edge cases and consistent application of labeling taxonomies across large datasets that ranged from thousands to hundreds of thousands of items. Quality was a top priority throughout every project. I adhered to strict accuracy benchmarks, conducted regular self-reviews, and incorporated feedback from audits and quality assurance teams to maintain high inter-annotator agreement. I ensured compliance with turnaround times while prioritizing precision and guideline alignment. By actively flagging ambiguities and participating in calibration updates.

In my Remotasks work, I contributed to a range of AI training data initiatives involving image, text, and audio annotation. The scope of projects included bounding box and polygon annotation, semantic segmentation, content categorization, entity and intent tagging, transcription, and evaluation of model-generated outputs. Tasks were performed according to detailed client guidelines, often requiring careful interpretation of edge cases and consistent application of labeling taxonomies across large datasets that ranged from thousands to hundreds of thousands of items. Quality was a top priority throughout every project. I adhered to strict accuracy benchmarks, conducted regular self-reviews, and incorporated feedback from audits and quality assurance teams to maintain high inter-annotator agreement. I ensured compliance with turnaround times while prioritizing precision and guideline alignment. By actively flagging ambiguities and participating in calibration updates.

2018 - 2025

Education

M

Muhomo

Certificate in Computer , Certificate in Computer

Certificate in Computer
2016 - 2017
N

Nambilima Secondary School

Kenya Certificate of Secondary Education, General Education

Kenya Certificate of Secondary Education
2012 - 2015

Work History

R

Remotask

3D lidar Annotation

Nairobi
2018 - 2025
B

Blue Com

Sales Associate

Nairobi
2024 - 2024