For employers

Hire this AI Trainer

Sign in or create an account to invite AI Trainers to your job.

Invite to Job
Yanjie Koo

Yanjie Koo

Expert in Prompt Engineering, Evaluating, and Audio Transcribing

Singapore flagSingapore, Singapore
$25.00/hrEntry LevelRemotasksScale AIOther

Key Skills

Software

RemotasksRemotasks
Scale AIScale AI
Other

Top Subject Matter

No subject matter listed

Top Data Types

AudioAudio
ImageImage
TextText

Top Task Types

Audio Recording
Computer Programming Coding
Evaluation Rating
Prompt Response Writing SFT
Translation Localization

Freelancer Overview

I have extensive experience in AI data annotation, transcription, and audio recording, having contributed to over 30–40 tasks across multiple projects focused on audio data. I am proficient in Scale AI and Alignerr, handling tasks independently and overseeing quality control, ensuring accuracy and consistency in all outputs. Additionally, I have worked on prompt engineering and AI response evaluation, including imagery selection, completing over 300 tasks across numerous projects. While the projects are primarily task-based, I consistently receive positive feedback for precision, attention to detail, and reliability in delivering high-quality data for AI model training.

Entry LevelEnglishChinese Mandarin

Labeling Experience

Audio Transcriber

OtherAudioAudio Recording
I will listen to an Audio, then I will transcribe what the person is saying in the audio. I have done this in both English and Chinese

I will listen to an Audio, then I will transcribe what the person is saying in the audio. I have done this in both English and Chinese

2025
Scale AI

Prompt & AI response evaluator

Scale AITextEvaluation Rating
I was tasked to write prompts that will intentionally cause the AI model to make mistakes and then evaluate and rate them based on the overall performance and whether they are suitable to be added as training data.

I was tasked to write prompts that will intentionally cause the AI model to make mistakes and then evaluate and rate them based on the overall performance and whether they are suitable to be added as training data.

2025
Scale AI

Audio Annotator

Scale AIAudioEvaluation Rating
I had to record a conversation with a AI model, annotate the timelines of speech, and also rate the ability to answer to the questions I posed during the conversation as well as the ability to adhere to the system prompt

I had to record a conversation with a AI model, annotate the timelines of speech, and also rate the ability to answer to the questions I posed during the conversation as well as the ability to adhere to the system prompt

2025 - 2025

Education

T

Temasek Polytechnic

Diploma, Big Data And Analytics

Diploma
2019 - 2022
S

Singapore University Of Technology And Design

Bachelors, Engineering Systems And Design

Bachelors
2024

Work History

S

Singapore Armed Forces (SAF)

Admin Clerk (Operations, Training, Safety)

Singapore
2023 - 2024
I

Infineon Technologies

Data Analyst Intern

Singapore
2021 - 2022