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Alex Ochieng'

@alexochieng2

Data labeling specialist at Appen Global Solutions who led seven annotators and improved annotation quality by reducing error rates 22%.

Kenya

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At Appen Global Solutions, I led a team of seven annotators and conducted daily QA audits, reducing error rates by 22% over two quarters. I also onboarded annotators and worked with ML engineers to refine labeling guidelines.

At Scale AI Partner Program, I annotated images for computer vision models and tagged NLP datasets, maintaining 98% accuracy against gold-standard benchmarks. I also reviewed peer annotations during quality control cycles.

At Labelbox Vendor Network, I labeled audio transcripts and annotated audio and video, including speaker diarization and timestamp verification. I maintained a 97%+ quality score across assigned labeling batches during my first year.

Experience

Work history, roles, and key accomplishments

Egocentric Video Data Collector

Fuzu Atlas

Aug 2026 - Aug 2026 (0 months)

Captured first-person video data for training robotics AI models, handling equipment setup, recording, quality assurance, and annotation. Delivered 30 hours of approved footage meeting data quality standards.

Video Data Collection Quality Assurance Annotations equipment setup Data Quality

Senior Data Labeling

Appen Global Solutions

Sep 2025 - Dec 2025 (3 months)

Led a team of 7 annotators labeling text, video, and image datasets for NLP and computer vision projects, ensuring 99% adherence to client guidelines. Conducted daily QA audits, reducing error rates by 22% over two quarters, and onboarded/trained new annotators.

Team Leadership Data Annotation CVAT LabelStudio Quality Assurance QA auditing Training NLP Computer Vision

Data Labeling Specialist

Scale AI Partner Program

Mar 2025 - Aug 2025 (5 months)

Annotated over 10,000 images using bounding boxes, polygons, and semantic segmentation for autonomous vehicle and retail computer vision models. Conducted text classification and NER tagging for NLP datasets, maintaining 98% accuracy, and reviewed peer annotations during quality control.

Image Annotation Bounding Boxes Polygon Semantic Segmentation Text Classification Named Entity Recognition Quality Control Computer Vision NLP

Junior Data Annotator

Labelbox Vendor Network

Jul 2023 - Feb 2025 (1 year 7 months)

Labeled audio transcripts for speech-to-text model training, including speaker diarization and timestamp verification. Performed audio and video annotation using Unitlab, maintaining high accuracy and attention to detail, and consistently met deadlines.

Audio Annotation Video Annotation Speaker Diarization Time Verification Unitlab Quality Assurance Attention To Detail