Fengsheng C.

Key Skills

Software

Label Studio

Top Subject Matter

Large Language Model (LLM) Data Training

Multi-modal Image Annotation

Video Annotation for Multi-modal Models

Top Data Types

Text

Image

Video

Document

Top Task Types

Classification

Object Detection

Segmentation

Freelancer Overview

Annotation Engineer – LLM Text Annotation. Core strengths include Label Studio. Education includes Master of Computer Science, Zhejiang University of Technology (2023) and Bachelor of Engineering, Zhejiang University of Technology (2020). AI-training focus includes data types such as Text, Image, and Video and labeling workflows including Classification, Object Detection, and Segmentation.

Labeling Experience

Annotation Engineer – Video Annotation

Label StudioVideoSegmentation

I handled video data annotation projects requiring frame-level segmentation and object tracking. Precise annotation contributed to building reliable datasets for advanced vision models. Routine quality inspections were carried out to maintain dataset reliability. • Labeled video frames with segmentation methods for scene understanding. • Communicated with the team to calibrate annotation standards. • Handled deduplication and cleaning of video data batches. • Assisted in process optimization for video annotation workflow.

2023 - Present

Annotation Engineer – Image Annotation

Label StudioImageObject Detection

I conducted image annotation projects for multi-modal deep learning, focusing on object detection, semantic segmentation, and key point annotation. Each annotation task was completed with high accuracy and consistency using professional tools. Datasets were used to support robust multi-modal model training. • Executed bounding box and polygon annotations for diverse image data. • Consistently followed SOPs for annotation accuracy. • Contributed to multi-modal fusion by labeling both images and corresponding data. • Supported team quality control via periodic review of annotated samples.

2023 - Present

Annotation Engineer – LLM Text Annotation

Label StudioTextClassification

As an Annotation Engineer, I performed large language model (LLM) text annotation for diverse projects. My work included text classification, entity recognition, and instruction fine-tuning using established SOP workflows. Attention to detail and data cleaning ensured high-quality datasets for algorithm development. • Performed advanced text annotation, including intent classification and entity extraction. • Optimized annotation guidelines for efficiency and accuracy. • Provided ongoing feedback to improve annotation processes and team output. • Ensured strict SOP compliance in all labeling activities.

2023 - Present

Education

Work History