Projects

Things I've built across low-latency systems, robotics, embedded systems, AI and games.

Interactive

Limit Order Book 📈

A price-time priority matching engine in C++20 with limit, IOC and FOK orders, optimised step by step from a simple std::map version that is kept as the correctness reference. Flat-array price levels, 32-byte orders, no heap allocation on the hot path, a 64-bit bitmap for best bid/ask and an open-addressing hash map for O(1) cancels. Runs live in your browser: place orders or turn on random flow.

C++20WebAssemblyLive demo

Guandan 掼蛋 🃏

The Jiangsu climbing card game. Play solo against three bots or open a room and play online with friends. A C++20 rules engine and move generator with heuristic bots; a Node.js + WebSocket server runs the same engine (WASM) as the authoritative state machine, tested with unit tests and bot self-play.

C++20WebAssemblyNode.jsWebSocket

Robotics & hardware

Mini Tank by Raspberry Pi

2025
  • Open-source Raspberry Pi robotic tank.
  • Real-time control and live video streaming from a browser, using Python and Flask.
  • End-to-end hardware and software integration.

github.com/frankluyf/mini-tank-by-raspberry-pi →

Research

HDE Algorithm-Assisted PDR Navigation Correction

2023

Patent project with Nanjing University of Science and Technology

  • Pedestrian dead reckoning combined with Kalman filtering to reduce indoor navigation drift.
  • Accelerometer and magnetometer calibration for motion-tracking accuracy.
  • Algorithm optimisation integrated with embedded hardware design.

Neural Network-Assisted Human Motion Positioning

2023

Patent project with Nanjing University of Science and Technology

  • Temporal convolutional network (TCN) for adaptive step-length prediction.
  • Python pipelines for motion data processing and sensor fusion.

AI & software

Loan-file verification pipeline (WZ Group internship)

Jun – Sep 2026
  • First built on a locally deployed LLM (Qwen, 4-bit): PDF table extraction, document classification, ID cross-checks and amount extraction.
  • Then rewritten as a CPU-only rules engine: it matched the LLM on 74/74 classifications and 73/74 amounts over 385 pages, at over 30x the throughput and with no GPU.

Hajime: AI-Powered Multimodal Language Converter

2025
  • WeChat public account built with Python and Tencent Cloud APIs.
  • Zhipu AI for text-to-"secret language" translation and back.
  • Multimodal recognition of both images and text.

github.com/frankluyf/hajime →

Games

Ancient Egypt educational history game (Legal Pythia)

Dec 2025
  • Designed the core map and implemented custom gameplay logic in RPG Maker MZ, extended with JavaScript.
  • Integrated historical assets and contributed to a Medieval Naples DLC.

Playable games of my own are on the games page.