Waki Tajima

Key Skills

Software

Scale AI

Other

Top Subject Matter

No subject matter listed

Top Data Types

Text

Audio

Document

Top Task Types

RLHF

Evaluation Rating

Audio Recording

Bounding Box

Freelancer Overview

I am an experienced data annotation specialist and AI trainer with a strong background in IT and over a year of hands-on work with companies such as Outlier, DataAnnotation, and Prolific. My recent projects include voice recording in natural Japanese for conversational AI, detailed image annotation involving bounding boxes, transcription, and semantic grouping for computer vision tasks, as well as evaluating and refining machine learning models through prompt engineering and human feedback. With a solid foundation in IT project management and system development from my years at Mitsubishi Corporation, I bring attention to detail, a deep understanding of data quality, and a commitment to ethical AI practices. I am fluent in Japanese and have business-level English proficiency, enabling me to contribute effectively to global AI and data labeling projects.

Labeling Experience

Optical Character Recognition

OtherDocumentBounding Box

Annotation of an image and drawing bounding boxes around each word, transcribing it, and markingoverlaid/scene text; grouping word annotations into lines based on physical position, orientation, and semantic consistency, indicating if the line isoverlaid/scene text; grouping lines into meaningful semantic paragraphs, specifying if the paragraph is overlaid/scene text.

Annotation of an image and drawing bounding boxes around each word, transcribing it, and markingoverlaid/scene text; grouping word annotations into lines based on physical position, orientation, and semantic consistency, indicating if the line isoverlaid/scene text; grouping lines into meaningful semantic paragraphs, specifying if the paragraph is overlaid/scene text.

2025 - 2025

AI Voice Trainer

Scale AIAudioAudio Recording

Record natural conversations for AI development. Create and record voice prompts for AI chatbot development

Record natural conversations for AI development. Create and record voice prompts for AI chatbot development

2025 - 2025

AI Trainer

Scale AITextRLHFEvaluation Rating

Not specific on industry but specific to Japanse language

Not specific on industry but specific to Japanse language

2025 - 2025

Education

Work History