Vivian O.

Key Skills

Software

Other

Appen

Top Subject Matter

NLP (sentiment analysis, NER, text classification)

Computer vision (bounding boxes, segmentation, object labeling)

AI training assessments and evaluation frameworks

Top Data Types

Text

Image

Top Task Types

Segmentation

Freelancer Overview

Freelancer — Data annotation and labeling for machine learning/AI training projects at OATA TECH (Remote). Brings 4+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other and Appen. Education includes Bachelor of Science, Karatina University (2022). AI-training focus includes data types such as Text and Image and labeling workflows including Entity (NER), Segmentation, and Evaluation.

Labeling Experience

Freelance Puzzle Designer and Content Creator — content and assessment design for AI training support at APPEN (Remote)

AppenText

Designed and developed creative assessment methods intended to evaluate skills of potential team members for AI-related work. Created puzzles and content that support community learning and iterative improvement of AI training activities. Gathered feedback from clients and communities to refine evaluation approaches and enhance engagement. • Built assessment methods to evaluate candidate skills • Designed puzzles and learning content • Incorporated feedback to improve designs • Ensured engagement and appropriate challenge levels

2022 - 2024

Freelancer — Image annotation and dataset labeling for ML/AI training at OATA TECH (Remote)

OtherImageSegmentation

Completed image annotation tasks for computer vision datasets, including bounding boxes, segmentation, and object labeling. Ensured labeled data met accuracy and consistency requirements by adhering to quality standards and project guidelines. Produced clean, accurately labeled datasets while meeting tight project deadlines. • Bounding boxes and object labeling • Image segmentation annotations • Accuracy-focused guideline adherence • Timely delivery of labeled datasets

2021 - 2022

Freelancer — Data annotation and labeling for machine learning/AI training projects at OATA TECH (Remote)

OtherText

Provided text annotation for NLP datasets, including sentiment labeling, entity recognition, and data categorization. Followed detailed annotation guidelines to ensure consistency and high accuracy across labeled outputs. Collaborated with AI teams to resolve labeling ambiguities and improve overall data quality. • Sentiment labeling for NLP training data • Entity recognition (NER) and classification • Text categorization and tagging • Quality assurance against annotation standards

2021 - 2022

Education

Work History