Stephen Ndambiri
@stephenndambiri
AI Data Annotation Specialist training machine learning models with high-quality, validated multi-modal datasets.
United StatesWhat I'm looking for
I’m a highly detail-oriented AI Data Annotation Specialist and IT student, focused on training machine learning models with high-quality annotated datasets. I support NLP, computer vision, and speech recognition workflows by delivering accurate labels across text, audio, image, and video.
In my current remote roles, I’ve performed tasks such as text classification, sentiment analysis, entity recognition, transcription, and prompt evaluation. I also annotate images and videos using bounding boxes, polygon segmentation, keypoint annotation, and object tracking, while maintaining strict annotation guidelines.
I’m especially proud of my quality-first approach: I conduct data validation and quality assurance to ensure accuracy, consistency, and reliability. Through remote collaboration and rigorous documentation, I’ve improved dataset performance by identifying labeling inconsistencies and applying corrective actions.
Experience
Work history, roles, and key accomplishments
AI Data Annotation Specialist
Atlas Capture
Jan 2021 - Present (5 years 6 months)
Worked on AI training and annotation projects using Atlas Capture, performing labeling across text, audio, image, and video datasets. Ensured high accuracy and consistency through validation and quality assurance processes.
AI Data Annotation Specialist
Atlas
Jan 2021 - Present (5 years 6 months)
Worked on AI training and annotation projects using Atlas, performing multi-format labeling across text, audio, image, and video datasets. Completed data validation and quality assurance under strict guidelines and deadlines.
Virtual Content & Data Support
Remote
Jan 2021 - Present (5 years 6 months)
Prepared and structured datasets for machine learning training pipelines, and reviewed AI-generated outputs for quality and accuracy. Performed content moderation and classification tasks according to project-specific guidelines.
Worked on AI training and annotation projects using Remotasks, performing text, audio, image, and video annotation. Conducted data validation and quality assurance to maintain accuracy and consistency, using tools for remote collaboration.
Worked on AI training and annotation projects using Scale AI, completing multi-format annotation for machine learning datasets. Conducted quality assurance and validation to maintain dataset accuracy and consistency under deadlines.
Worked on AI training and annotation projects using Outlier, covering text, audio, image, and video dataset labeling. Performed validation and quality assurance to improve dataset performance and labeling consistency.
Worked on AI training and annotation projects using Appen, completing text, audio, image, and video annotation tasks. Supported NLP, computer vision, and speech recognition workflows with validation and quality assurance.
Education
Degrees, certifications, and relevant coursework
University of Eldoret
Bachelor of Information Technology, Information Technology
Earned a Bachelor’s degree in Information Technology from the University of Eldoret, class of 2021.
Tech stack
Software and tools used professionally
Availability
Location
United StatesAuthorized to work in
KenyaJob categories
Skills
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