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George Njoroge

George Njoroge

4.03 reviews

Machine Learning & Data Annotation Specialist|Hardworking, Reliable, Time

Kenya flagNairobi, Kenya
$10.00/hrExpertAppenClickworkerCloudfactory

Key Skills

Software

AppenAppen
ClickworkerClickworker
CloudFactoryCloudFactory
CrowdSourceCrowdSource
CVATCVAT
Data Annotation TechData Annotation Tech
Figure EightFigure Eight
HastyHasty
iMeritiMerit
Label StudioLabel Studio
Mighty AIMighty AI
RemotasksRemotasks
RoboflowRoboflow
SamaSama
Scale AIScale AI
SuperAnnotateSuperAnnotate
TolokaToloka
V7 LabsV7 Labs
Other
Internal/Proprietary Tooling

Top Subject Matter

Computer Vision
Natural Language Processing
Geospatial Data

Top Data Types

3D Sensor
ImageImage
VideoVideo

Top Task Types

Bounding BoxBounding Box
CuboidCuboid
Data CollectionData Collection
PolygonPolygon
SegmentationSegmentation

Freelancer Overview

Over the past 5+ years, I have gained solid hands-on experience in AI training and data labeling across a range of projects and tools. I am proficient in using platforms such as Labelbox, Scale AI, and Amazon Mechanical Turk, and I adapt quickly to new annotation environments. My work has involved preparing high-quality datasets through data cleaning, preprocessing, and structured labeling. I apply strict quality assurance methods, including multi-pass reviews and consistency checks, to ensure accuracy and reliability. I have also supported model training efforts by contributing well-structured, high-integrity data that improves model performance.

Expert4.0EnglishSwahili

Reviews (3)

Jan 2026

Well done!

Dec 2025

Very happy to be working with you. Good responsiveness and communication.

Dec 2025

I had a good experience. He communicates quickly and does the work like asked. When the annotation quality is not good enough, he goes over the data again. Well done!

Labeling Experience

Data Annotator

3D SensorSegmentation
Annotating 3D LiDAR data (cuboids, segmentation) Supporting autonomous driving AI systems

Annotating 3D LiDAR data (cuboids, segmentation) Supporting autonomous driving AI systems

2024 - Present

Quality Control

ImageClassification
Classifiied 20,000+ images(ripe/unripe grapes) using Roboflow Ensured high-quality dataset for agricultural AI models

Classifiied 20,000+ images(ripe/unripe grapes) using Roboflow Ensured high-quality dataset for agricultural AI models

2024 - 2024

Quality Assuarance

AudioEntity Ner Classification
Improved validation pipelines, achieving 100% faster turnaround time

Improved validation pipelines, achieving 100% faster turnaround time

2022 - 2022

Data Labeller

VideoCuboid
Annotated vehicles and pedestrians with 99% model accuracy contribution

Annotated vehicles and pedestrians with 99% model accuracy contribution

2020 - 2021

Education

U

University of Nairobi

Bachelor of Science in Computer Science , Computer Science

Bachelor of Science in Computer Science
2014 - 2018

Work History

S

Samasource (Sama)

Data Analyst

Nairobi
2021 - 2024