Zhang J.

Key Skills

Software

Label Studio

Prodigy

Doccano

CVAT

Top Subject Matter

Natural Language Processing (NLP)

Autonomous Driving

Machine Learning

Top Data Types

Text

Image

Top Task Types

Entity (NER) Classification

Bounding Box

Freelancer Overview

Senior Data Annotation Specialist. Brings 7+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Label Studio, Prodigy, and Doccano. Education includes Bachelor of Arts, Your University Name (2020). AI-training focus includes data types such as Text and Image and labeling workflows including Entity (NER) Classification and Bounding Box.

Labeling Experience

Senior Data Annotation Specialist

Label StudioTextEntity (NER) Classification

As a Senior Data Annotation Specialist, I executed high-volume text annotation projects for NLP models, ensuring accurate labeling of vast datasets. My responsibilities included developing and refining annotation guidelines and conducting quality audits. I contributed directly to model improvement by collaborating with engineers to identify data biases. • Managed text classification and Named Entity Recognition labeling tasks. • Labeled over 50,000 data entries per month with a 99% quality assurance pass rate. • Reduced team ambiguity and improved labeling consistency by 20%. • Supported data quality through peer reviews and detailed feedback.

2022 - Present

Data Processing Assistant

CVATImageBounding Box

As a Data Processing Assistant, I performed image annotation tasks focused on autonomous driving datasets. My work involved drawing bounding boxes and polygons to ensure precise object delineation. I also assisted in cleaning and pre-processing raw text data for machine learning. • Executed bounding box and polygon annotations for images. • Ensured high-quality standards by maintaining detailed daily logs. • Prepared and cleaned textual corpora for model training. • Reported data discrepancies and technical issues promptly.

2020 - 2021

Education

Work History