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Steven Choi

Steven Choi

Versatile AI Data Labeler | Images, Videos & Text Tasks

South Korea flagSeoul, South Korea
$15.00/hrIntermediateAppenClickworkerCrowdsource

Key Skills

Software

AppenAppen
ClickworkerClickworker
CrowdSourceCrowdSource
OneFormaOneForma
TelusTelus
Other

Top Subject Matter

No subject matter listed

Top Data Types

AudioAudio
TextText
VideoVideo

Top Task Types

Audio Recording
Classification
Polygon
Question Answering
Text Summarization

Freelancer Overview

I have extensive experience in data labeling and AI training across Natural Language Processing (NLP), Computer Vision, and AI model evaluation. My work has included text classification, sentiment analysis, entity recognition, and bilingual translation evaluation for large-scale multilingual datasets in both Korean and English. In addition, I have completed numerous computer vision projects, such as image annotation, bounding box and polygon labeling, and video frame-by-frame tagging for object and activity recognition. Beyond annotation, I have contributed to improving search and information retrieval systems by evaluating query intent and search relevance, as well as conducting quality reviews of AI-generated outputs. I am skilled in using a wide range of annotation platforms (Appen, Scale AI, Toloka, Remotasks, UHRS, Labelbox) and consistently deliver accurate results under tight deadlines. My ability to handle complex datasets with precision, combined with strong bilingual skills and a detail-oriented approach, makes me highly effective in supporting AI training and model development.

IntermediateKoreanEnglish

Labeling Experience

LLM Evaluation

OtherTextEvaluation Rating
I have hands-on experience evaluating AI and chatbot outputs, including large language models (LLMs). My work involved assessing the completeness, accuracy, relevance, and fluency of AI responses across multiple domains. I also created and tested prompts to ensure the models generate contextually appropriate and high-quality outputs. This evaluation work helped improve AI performance, enhance user experience, and maintain high standards for training datasets.

I have hands-on experience evaluating AI and chatbot outputs, including large language models (LLMs). My work involved assessing the completeness, accuracy, relevance, and fluency of AI responses across multiple domains. I also created and tested prompts to ensure the models generate contextually appropriate and high-quality outputs. This evaluation work helped improve AI performance, enhance user experience, and maintain high standards for training datasets.

2024 - 2025

Audio

OtherAudioAudio Recording
I recorded high-quality audio samples for AI training, ensuring clear pronunciation and consistent sound levels. These recordings were used to create annotated datasets for speech recognition and text-to-speech (TTS) model development.

I recorded high-quality audio samples for AI training, ensuring clear pronunciation and consistent sound levels. These recordings were used to create annotated datasets for speech recognition and text-to-speech (TTS) model development.

2024 - 2025

Experience

OtherImagePolygon
I have experience performing image polygon labeling for computer vision projects, including object detection and segmentation tasks. This involved accurately outlining objects in images to create high-quality annotated datasets for AI model training.

I have experience performing image polygon labeling for computer vision projects, including object detection and segmentation tasks. This involved accurately outlining objects in images to create high-quality annotated datasets for AI model training.

2022 - 2023

Education

K

Korea National Open University

Bachelor of Business Administration, Business Administration

Bachelor of Business Administration
2020 - 2022

Work History

A

Accounting Firm

Accountant

Seoul
2022 - Present