Hellen W.

Key Skills

Software

Sama

Top Subject Matter

2D/3D computer vision training datasets (image & video annotation)

Identity/signature data verification and compliance checking

Operational feedback loop and quality coordination

Top Data Types

Image

Video

Text

Document

Top Task Types

Segmentation

Data Collection

Freelancer Overview

Machine Learning Trainer & Quality Specialist — annotation and quality assurance for computer vision datasets. Brings 1+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Sama, N, and A. Education includes Bachelor of Information Technology, Jomo Kenyatta University of Agriculture and Technology (JKUAT) and AI Data Training Certification, AIDRA Labs (2026). AI-training focus includes data types such as Video and Text and labeling workflows including Segmentation, Evaluation, and Rating.

Labeling Experience

Machine Learning Trainer (Data annotation and semantic segmentation) at Sama Ltd. Kenya

SamaVideoSegmentation

Led end-to-end annotation workflows for 2D and 3D computer vision training datasets, including high-density image/video frames. Performed precise semantic segmentation and created custom key points for vector graphics to support AI model training. Acted as an internal QC checkpoint by reviewing auto-annotated frames to identify, log, and correct labeling inaccuracies. • Annotated semantic segmentation labels for complex visual scenes • Defined key-point annotations for vector graphics • Validated and audited auto-annotations through manual QC • Managed delivery timelines to meet strict data integrity benchmarks

2018 - 2026

Data Verification & Polling Clerk — verification-oriented quality checking

Text

Conducted high-volume verification work by comparing identity and signature details against database records to ensure compliance and correctness. Maintained organized internal documentation and audited information packets for clarity, completeness, and accuracy. Ensured data confidentiality and reduced risk through adherence to data protection protocols during the deployment period. • Verified identity and signature information against stored records • Audited packets for accuracy and completeness • Managed systematic internal filing and review • Followed confidentiality and data protection procedures

2022 - 2022

Operations & Quality Coordinator (General) — process improvement via feedback

TextData Collection

Coordinated operational processes using structured feedback loops to implement iterative improvements in service delivery and compliance. Supported workflow efficiency by establishing communication matrices for team performance. Used collected customer and data feedback as inputs to refine processes. • Streamlined operations and improved workflow efficiency • Implemented iterative improvements from structured feedback • Supported compliance through better data/process handling • Assisted coordination through team communication frameworks

2017 - 2017

Education

Work History