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Joseph Maina

Joseph Maina

AI Trainer, Data labeller and Translation Specialist

KENYA flag
Nairobi, Kenya
$20.00/hrExpertCloudfactoryOtherHasty

Key Skills

Software

CloudFactoryCloudFactory
Other
HastyHasty
ClickworkerClickworker
CVATCVAT

Top Subject Matter

No subject matter listed

Top Data Types

ImageImage
VideoVideo
AudioAudio

Top Label Types

Bounding Box
Polygon
Object Detection
Translation Localization
Audio Recording
Action Recognition
Transcription
Point Key Point
RLHF
Text Summarization
Data Collection

Freelancer Overview

I am a detail-oriented professional with hands-on experience in data annotation and labeling for AI and machine learning projects, particularly in computer vision. At Cloudfactory Kenya, I have accurately labeled images and videos using bounding boxes and polygons, consistently delivering high-quality datasets for various computer vision applications. My background also includes translation and transcription work, ensuring precise and nuanced data for NLP tasks. With strong skills in data analysis using Excel and a foundation in Information Science, I am adept at following complex annotation guidelines and performing rigorous quality assurance. I am committed to supporting the development of reliable AI systems by providing meticulous and consistent training data.

ExpertEnglishSwahili

Labeling Experience

Video annotator

OtherVideoObject DetectionAction Recognition
Labelling actions seen on videos and describing the actions being performed where there are hand interactions.

Labelling actions seen on videos and describing the actions being performed where there are hand interactions.

2025
CloudFactory

Data Annotator

CloudfactoryImageBounding BoxPolygon
involved training AI to differentiate between different parts of the oil rig structure including structure, insulation, pipes, connectors and others to be able to detect defects in the structures and raise alarm.

involved training AI to differentiate between different parts of the oil rig structure including structure, insulation, pipes, connectors and others to be able to detect defects in the structures and raise alarm.

2025 - 2025

Translation Specialist

OtherAudioTranslation LocalizationAudio Recording
Created and delivered highly-praised content with accuracy ensuring the meaning and nuances are preserved.

Created and delivered highly-praised content with accuracy ensuring the meaning and nuances are preserved.

2024 - 2025
CloudFactory

Video Annotation

CloudfactoryVideoBounding BoxPolygon
Accurately labelled videos from sports such as NHL NBA, UEFA, MLS, RUGBY E.T.C. The labelling of videos is inclined to finding team sponsors on field placements and player jerseys and label them whether they are clear or recognizable and whether they appear on foreground or background.

Accurately labelled videos from sports such as NHL NBA, UEFA, MLS, RUGBY E.T.C. The labelling of videos is inclined to finding team sponsors on field placements and player jerseys and label them whether they are clear or recognizable and whether they appear on foreground or background.

2023 - 2025
CloudFactory

Image and video annotator

CloudfactoryImageBounding BoxPolygon
Accurately labelled images from sports such as NHL NBA, UEFA, MLS, RUGBY E.T.C. The labelling of images is inclined to finding team sponsors on field placements and player jerseys and label them whether they are clear or recognizable and whether they appear on foreground or background. Bounding boxes are used for computer enhanced vision.

Accurately labelled images from sports such as NHL NBA, UEFA, MLS, RUGBY E.T.C. The labelling of images is inclined to finding team sponsors on field placements and player jerseys and label them whether they are clear or recognizable and whether they appear on foreground or background. Bounding boxes are used for computer enhanced vision.

2023 - 2025

Education

A

ALX - Africa

Certificate, Virtual Assistant

Certificate
2024 - 2024
C

CloudFactory Kenya

Certificate in Data and Video annotation, Data & Image Annotation

Certificate in Data and Video annotation
2022 - 2023

Work History

F

Freelance

Virtual Assistant

Nairobi
2024 - Present
F

Freelance

Website Developer & Designer

Nairobi
2021 - Present