Hi, I'm Yifan.

MEng Engineering Science · Balliol College, University of Oxford

I study Engineering Science at Balliol College, Oxford. I started out in competitive programming (USACO Platinum, NOIP Second Prize) and now build things across hardware and software: a low-latency limit order book in C++20, an LLM-based loan-file verification pipeline during my summer 2026 internship at WZ Group, indoor-navigation algorithms in a research lab at Nanjing University of Science and Technology, a Raspberry Pi robot tank and an educational history game. Most of the demos on this site are written in C++ and run in your browser through WebAssembly. Outside engineering, I play the violin (Grade 10), sing in the Balliol College Chapel Choir and play football.

See my projects GitHub LinkedIn Email

Education

University of Oxford — Balliol College

2025 – 2029

MEng Engineering Science (expected 2029)

  • Mathematics for Engineers (linear algebra, probability & statistics), Programming, Electronics, Mechanics

Nanjing Foreign Language School

2022 – 2025

Chinese High School Curriculum

A-Levels (self-study)

2022 – 2024

Mathematics A* · Further Mathematics A* · Physics A* · Chemistry A*

Awards

Experience

Asset Management Intern — Wuchan Zhongda Asset Management Co., Ltd. (WZ Group)

Jun – Sep 2026
  • Built an automated loan-file verification pipeline on a locally deployed LLM (Qwen, 4-bit): PDF table extraction, document classification, ID cross-checks and amount extraction.
  • Rewrote it as a CPU-only rules engine that matched the LLM on 74/74 classifications and 73/74 amounts over 385 pages, at over 30x the throughput and with no GPU.
  • Performed third-party valuation of large non-performing personal debt portfolios, and due diligence and debt-transfer structuring for mining-company acquisitions.

Software Developer (Micro-internship) — Legal Pythia

Dec 2025
  • Co-developed an educational history game set in Ancient Egypt: designed the core map and implemented custom gameplay logic in RPG Maker, extended with JavaScript.
  • Integrated historical assets and contributed to a Medieval Naples DLC.

Control Engineering Lab — Nanjing University of Science and Technology

2023

Part-time research, two collaborative patent projects

  • HDE-assisted PDR navigation correction: pedestrian dead reckoning and Kalman filtering to reduce indoor navigation drift; accelerometer and magnetometer calibration.
  • Neural-network human motion positioning: TCN-based model for adaptive step-length prediction, with Python sensor-fusion pipelines.

Selected projects

Limit Order Book 📈

A low-latency C++ matching engine compiled to WebAssembly. Place orders and watch the book move, live in your browser.

C++20WebAssemblyLive demo

Guandan 掼蛋 🃏

Play solo against bots or online with friends. The rules engine and AI are C++, and the browser and the server run the same code.

C++20WebAssemblyOnline multiplayer

Mini Tank by Raspberry Pi

Open-source robotic tank with real-time control and live video streaming over the web.

PythonFlaskRaspberry Pi

Hajime: AI Language Converter

WeChat public account that translates text to and from a "secret language" with multimodal input.

PythonZhipu AITencent Cloud

More projects →

Full write-ups, including the indoor navigation research and game development work.

Skills

Programming
C++ (C++20, performance and memory layout), Python, JavaScript, MATLAB, Arduino
Tools
Git, Linux, Emscripten / WebAssembly, Node.js, PyTorch, local LLM deployment, Raspberry Pi, RPG Maker MZ
Quant
Market microstructure / order matching, Kalman filtering, time-series models (TCN)
Languages
Mandarin (native), English (fluent, IELTS 8.0, PTE 83)
Music
Violin Grade 10 · Balliol College Chapel Choir
Interests
Competitive programming, markets, electronics prototyping, open source, football, music performance

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