About

Chan Jeun Yu

Statistical Assistant · Hong Kong

Data science and AI engineering across RAG systems, conversational platforms, and production analytics workflows.

BSc (Hons) in Data Science & Analytics from The Hong Kong Polytechnic University. I build RAG agents, full-stack AI products, and data pipelines—from WYNI AI's conversational platform and LegCo Insight Bot to government statistical reporting and computer-vision deployments.

Background

I work at the intersection of data engineering, applied AI, and full-stack delivery—grounding LLM features in reliable retrieval, validation, and observability.

Recent roles span AI development (RAG agents, ERP/WMS migration with GenAI-assisted engineering), computer vision (YOLO, DeepStream), and statistical operations (BoP data validation, IMF publication automation).

Operating principles

  • Validate data and model outputs before scaling to production traffic.
  • Design RAG and agent workflows with clear fallback and human-in-the-loop paths.
  • Automate repetitive document and reporting pipelines where accuracy matters.
  • Ship incrementally with measurable quality checks—not prompt-only iteration.

CV detection accuracy

92%

Images preprocessed

27k+

Data-entry efficiency gain

15%

Scholarship

2021

Timeline

Professional experience

Roles across government statistics, AI product development, computer vision, and full-stack delivery.

Dec 2025 – Present

Statistical Assistant · Hong Kong Census and Statistics Department, HKSAR Government

Cross-country statistical data consolidation; BoP data preparation, calibration, and validation; Python automation for monthly IMF release-date PDF retrieval and archival; publication schedule verification.

Aug 2025 – Oct 2025

AI Developer (Full-time) · WYNI AI LIMITED

Core AI conversational platform with RAG multi-turn dialogues; RAG agent for HK Department of Health (Gemini/GPT, real-time sources); legacy ERP-to-WMS migration with GenAI-assisted spec coding and refactoring.

Apr 2025 – May 2025

STEM Engineer (Part-time) · Parami Company Limited

Developed and deployed a YOLO-based object detection system to improve precision and efficiency for robotics applications.

Aug 2024

Programmer Trainee (Part-time) · Smart Business Consultancy Limited

Built an HTML/JavaScript data input interface integrated with MySQL, improving data processing efficiency by 15%.

Jun 2024 – Aug 2024

STEM Intern — AI/ML (Computer Vision) · LifeSparrow Solution Limited

Raised drone imagery human-detection accuracy from 75% to 92% with Python and NVIDIA DeepStream; preprocessed and annotated 27,000+ images; deployed models on Azure.

Education

Academic background

Sep 2022 – Jan 2025

BSc (Hons) Data Science & Analytics

The Hong Kong Polytechnic University · Hong Kong

Sep 2023 – Jan 2024

Outbound Exchange Program

Chalmers University of Technology · Sweden

Sep 2020 – Aug 2022

Associate in Statistics and Data Science

Hong Kong Community College · Hong Kong

Core Capability

AI engineering stack for product delivery

I optimize for systems that are observable, testable, and deployable under real user load.

Programming Languages

  • Python
  • SQL
  • R
  • SAS
  • Haskell
  • TypeScript

LLM & NLP

  • RAG
  • Fine-tuning
  • Transformers
  • AI Agents
  • Gemini
  • DeepSeek
  • OpenAI

AI Frameworks

  • PyTorch
  • TensorFlow
  • Scikit-learn
  • Pandas
  • NumPy

Databases & Cloud

  • PostgreSQL
  • Supabase
  • MySQL
  • pgvector
  • Azure
  • Docker

General & Tools

  • Git
  • ETL
  • Alteryx
  • Next.js
  • React
  • Node.js

Languages

  • Cantonese (Native)
  • Mandarin (Native)
  • English (Intermediate)

Awards

Recognition

2021

Talent Development Scholarship — Innovation, Science and Technology

HKSAR Government Scholarship Fund