Zacharia O.

Key Skills

Software

Other

Remotasks

Appen

Top Subject Matter

Computer vision (autonomous driving and medical imaging) and dataset QA for ML training

LLM fine-tuning data labeling (NER and text extraction)

Top Data Types

Image

Text

Top Task Types

Segmentation

Freelancer Overview

Data Annotation Specialist (TechData Annotations). Brings 4+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other and Remotasks. Education includes Bachelor of Science, Moi University (2026). AI-training focus includes data types such as Image and Text and labeling workflows including Segmentation and Entity (NER).

Labeling Experience

Data Annotation Specialist (TechData Annotations)

OtherImageSegmentation

Provided labeled datasets for computer vision models across autonomous driving and medical imaging projects. Produced semantic segmentation and polygon annotations that adhered to strict SOP boundary requirements. • Labeled 5,000+ images weekly using segmentation and polygon-style boundaries. • Achieved ~98% QA accuracy rating through consistent guideline compliance. • Collaborated with QA reviewers to resolve ambiguous labeling cases. • Supported ML engineering by refining instructions through feedback loops.

2024 - Present

Data Labeler (Freelance)

RemotasksText

Conducted named entity recognition (NER) and text extraction for large language model (LLM) fine-tuning. Maintained consistent inter-annotator agreement by handling edge cases through proactive reviewer communication. • Labeled NER entities and extracted relevant text spans for training. • Resolved ambiguous/edge cases with senior reviewer guidance. • Adjusted quickly to different project instructions and specialized software. • Focused on dataset consistency and agreement to support model training.

2023 - 2024

Education

Work History