Minjun Liu

Key Skills

Software

Appen

HiveMind

Labelbox

Sama

Scale AI

Snorkel AI

SuperAnnotate

Top Subject Matter

No subject matter listed

Top Data Types

Audio

Document

Text

Top Task Types

Audio Recording

Bounding Box

Classification

Emotion Recognition

Geocoding

Freelancer Overview

I have hands-on experience in AI training and data labeling across high-impact risk domains. I led model training efforts targeting gibberish detection in user-provided emails and addresses, enhancing data quality for downstream systems. I also managed large-scale annotation of transaction data to identify credit card fraud patterns, enabling the development of more precise detection models. Additionally, I oversaw behavioral labeling initiatives to identify fake registrations, GPS spoofing, and invalid ride-hailing trips by analyzing user activity and vehicle movement, supporting the training of robust models for platform integrity and abuse prevention.

Labeling Experience

GPS spoofing in ATG

Scale AI3D SensorPolygonClassification

To train machine learning models to detect GPS spoofing or manipulation in real-time, using historical location traces, sensor data, and map overlays. This enhances fraud detection capabilities, reduces platform abuse (e.g. fake rides, inflated earnings), and protects end-user trust.

To train machine learning models to detect GPS spoofing or manipulation in real-time, using historical location traces, sensor data, and map overlays. This enhances fraud detection capabilities, reduces platform abuse (e.g. fake rides, inflated earnings), and protects end-user trust.

2025 - 2025

Education

Work History