John Njongoro
@johnnjongoro
Detail-focused professional seeking a Data Annotation Specialist role.
What I'm looking for
I am an ambitious and technologically savvy professional with a strong focus on data annotation and quality assurance. My experience includes annotating diverse data types such as text, images, audio, and video, ensuring precision and consistency in every project. I have a proven track record of utilizing various annotation tools, including Labelbox, Prodigy, and Amazon SageMaker Ground Truth, to deliver high-quality datasets that enhance AI model performance.
In my current role as a Data Labeling Associate, I have successfully labeled over 2,000 text entries for sentiment analysis and entity recognition, significantly contributing to NLP model training for e-commerce applications. My commitment to quality is evident in my development of annotation guidelines, which increased inter-annotator agreement by 25% within my team. I am dedicated to upholding data privacy standards and have ensured compliance with GDPR protocols in all my projects.
Experience
Work history, roles, and key accomplishments
Data Labeling Associate
Remote
Sep 2023 - Present (1 year 9 months)
Labeled over 2,000 text entries for sentiment analysis and entity recognition, enabling NLP model training for e-commerce applications. Conducted audio annotations for speech-to-text models with a 97% transcription accuracy. Developed guidelines that improved inter-annotator agreement by 25% and ensured compliance with GDPR.
Freelance Data Annotator
Appen & Upwork
Sep 2023 - Present (1 year 9 months)
Provided annotation services for image and text datasets, including bounding box creation and keyword tagging for retail and healthcare clients. Maintained a 95% client satisfaction rating while delivering over 1,500 annotations weekly under tight deadlines.
Education
Degrees, certifications, and relevant coursework
Chuka University
Bachelor of Science, Actuarial Science
2018 - 2022
Studied Actuarial Science with a focus on enhancing data accuracy, analytical and problem-solving skills, data structures, and database systems.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Social media
Job categories
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