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Hongxi Z.

Hongxi Z.

AI & Machine Learning Engineer · Mid-Level

United Arab Emirates · Rate on request · Active in the last 24h

Professional Overview

I'm a PhD researcher at Khalifa University (Abu Dhabi) working on diffusion models and deep learning for medical image processing. I build and train models end to end in PyTorch: diffusion models and U-Nets for medical imaging, on my own 2x RTX 4090 workstation. Before my PhD I trained reinforcement-learning policies at DiDi, where my model improved a key business metric by 0.87% in the Mexico market. Two Best Paper awards (IWSSIP 2024, iWRF&AT 2024). I help teams with computer vision and generative-model prototypes, model training and evaluation, reproducible ML pipelines, and expert AI training/evaluation tasks. Based in GMT+4, overlapping with Europe and Asia.

Experience

Company
DiDi
Oct 2023 – Dec 2023
Role title
Reinforcement Learning Algorithm Intern

AI Expertise

AI & Machine Learning Engineers

Skills

Reinforcement Learning Python PyTorch

Employment Type

Full-time

Description of Responsibilities

  • Built an offline-to-online RL algorithm for order waiting time
  • Trained policies on logged ride-hailing data to raise driver earnings
  • Shipped the model to production in the Mexico market

Key Achievements / KPIs

  • Increased platform transaction volume by 0.87% in Mexico

Education

School
Khalifa University
Sep 2025 – Present
Degree / Program
Ph.D.

Field of Study: Medical Image Processing

School
University of Electronic Science and Technology of China (UESTC)
Sep 2022 – Jun 2025
Degree / Program
M.S. (GPA 3.98)

Field of Study: Information and Communication Engineering

Areas of Expertise

AI & Machine Learning Engineers

Design, train, and ship production ML models — from data pipelines to model inference at scale. Covers supervised learning, neural networks, LLM integration, and model optimisation.

Computer Vision

Develop image recognition, object detection, video analysis, and multimodal AI systems for real-world applications.

Open to

Part-time Freelance Contract

AI Expertise

AI & Machine Learning Engineers Computer Vision Generative Media (Image, Video & Audio) AI Training & Data Annotation

Skills

PyTorch Python Stable Diffusion Reinforcement Learning Computer Vision NumPy Hugging Face

Experience Level

Mid-Level

Current location

United Arab Emirates

Time Zone

Dubai UTC+4

Primary Work Language

English

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