Open to opportunities

Lewis Oketch

@lewisoketch

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Experienced data annotator specializing in autonomous vehicle datasets and quality.

Kenya

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What I'm looking for

I seek a permanent role contributing to long-term AI projects, focused on high-quality annotation, collaboration with ML teams, process improvement, and career growth in annotation and data quality.

I am an experienced data annotator with deep expertise in autonomous vehicle annotation, having labeled vehicles, pedestrians, cyclists, lane markings, and traffic infrastructure across large-scale projects. I consistently deliver high-quality annotations and collaborate closely with data scientists and engineering teams to improve model accuracy.

Throughout my career I have annotated tens of thousands of data points, maintained exceptionally high accuracy rates, and contributed to process optimization and guideline improvements that increased efficiency and reduced errors. I adapt quickly to different annotation tools and meet tight deadlines while preserving attention to detail.

I am seeking a permanent role where I can apply my annotation skills, support long-term projects, and add sustained value through rigorous data management, constructive feedback, and a commitment to continuous improvement.

Experience

Work history, roles, and key accomplishments

Current

Data Annotator

Current

Toloka

Dec 2025 - Present (1 month)

Annotated autonomous driving datasets using bounding boxes, polylines, and polygons, performed frame-by-frame annotation for object tracking, and reviewed corrections to meet strict QA standards under tight deadlines.

Autonomous Vehicle Annotation Bounding Boxes Polylines Polygon Frame By Frame Annotation QA Annotations

Current

Data Annotator

Current

CloudFactory

Jan 2022 - Present (4 years)

Annotated over 50,000 data points with 95% accuracy, collaborated with data scientists to improve labeling models (97% precision/recall gains) and implemented verification methods that increased efficiency by 25%.

Data Annotation Quality Control Data Verification Documentation Cross Functional Collaboration

Data Annotator

Samasource Kenya

Jun 2021 - Nov 2025 (4 years 5 months)

Accurately labeled and annotated over 70,000 datasets and completed 6,000+ tasks, maintaining a 99% accuracy rate and improving annotation guidelines to boost model training effectiveness.

Data Annotation Bounding Boxes Quality Assurance Annotations Data Management Attention To Detail