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Ni Liu

Dataset & Annotation Lead (Image Curation)

China flagHangzhou, China
$30.00/hrExpertAws SagemakerAnno MageScale AI

Key Skills

Software

AWS SageMakerAWS SageMaker
Anno-MageAnno-Mage
Scale AIScale AI
Redbrick AIRedbrick AI
OpenCV AI Kit (OAK)OpenCV AI Kit (OAK)
Micro1
MercorMercor

Top Subject Matter

Generative AI
Computer Vision
Video Processing

Top Data Types

ImageImage
VideoVideo
TextText
DocumentDocument

Top Task Types

Segmentation
Bounding Box
Polygon
Object Detection
Text Generation
Question Answering
RLHF
Red Teaming
Evaluation Rating
Computer Programming Coding
Fine Tuning
Data Collection

Freelancer Overview

Dataset & Annotation Lead (Image Curation). Brings 8+ years of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include Internal and Proprietary Tooling. Education includes Master of Science, Zhejiang University (2019) and Bachelor of Science, Jilin University (2016). AI-training focus includes data types such as Image and Video and labeling workflows including Segmentation, Evaluation, and Rating.

ExpertEnglishChinese Mandarin

Labeling Experience

AI Model Evaluator (Video Model Evaluation)

Video
I spearheaded A/B testing and quality evaluation for multiple video models, including background replacement and gesture recognition systems. I systematically assessed configuration variations to accelerate model selection and implemented centralized prompt repositories for multi-agent workflows. I architected evaluation pipelines, integrating LLM-as-a-Judge workflows and CI/CD QA gates for continual assessment. • A/B testing and multi-model evaluation • Optimization of prompt iteration and deployment workflows • Automated and human-in-the-loop (HITL) assessment strategies • End-to-end video model quality control and validation

I spearheaded A/B testing and quality evaluation for multiple video models, including background replacement and gesture recognition systems. I systematically assessed configuration variations to accelerate model selection and implemented centralized prompt repositories for multi-agent workflows. I architected evaluation pipelines, integrating LLM-as-a-Judge workflows and CI/CD QA gates for continual assessment. • A/B testing and multi-model evaluation • Optimization of prompt iteration and deployment workflows • Automated and human-in-the-loop (HITL) assessment strategies • End-to-end video model quality control and validation

2025 - Present

Dataset & Annotation Lead (Image Curation)

ImageSegmentation
I built robust training databases and directed image annotation and data curation workflows for fine-tuning generative AI models. I implemented strict annotation protocols to improve visual accuracy and production-grade outputs. I also developed comprehensive quality control pipelines integrating both automated and human-in-the-loop (HITL) evaluation strategies. • Image database creation and strict annotation supervision • Automated and HITL QA for ControlNet/GAN architectures • Focused on resolving visual structural anomalies (hands/faces) • Enhanced dataset integrity for improved model fine-tuning

I built robust training databases and directed image annotation and data curation workflows for fine-tuning generative AI models. I implemented strict annotation protocols to improve visual accuracy and production-grade outputs. I also developed comprehensive quality control pipelines integrating both automated and human-in-the-loop (HITL) evaluation strategies. • Image database creation and strict annotation supervision • Automated and HITL QA for ControlNet/GAN architectures • Focused on resolving visual structural anomalies (hands/faces) • Enhanced dataset integrity for improved model fine-tuning

2023 - 2025

Education

Z

Zhejiang University

Master of Science, Electronics and Communication Engineering

Master of Science
2016 - 2019
J

Jilin University

Bachelor of Science, Information Engineering

Bachelor of Science
2012 - 2016

Work History

Z

Zhejiang Insigma International Software

AI Model Evaluator and DevOps Engineer

Hangzhou
2025 - Present
P

Proptexx

Generative AI and Model Evaluator

Remote
2023 - 2025