This is a brief summarization for some of the projects I've been working on!

Table of Contents

• Table of Contents
• Personal Projects
  • Gravitas: A 2D Tower Defense Indie Game
  • Shared Canvas: An In-person Collaboration App on iOS/iPadOS
  • Faruzan Senpai: A Discord Bot for My Private Server, integrating AI / LLM Features
  • MC Marketplace: Prototype of a Game Item Marketplace on Ethereum
  • iOS/iPadOS mini Apps
  • Minecraft Mod Localizations
• Courseworks
  • Disney BSDF for La Jolla Renderer
  • LLM-powered Emoji-to-Text Translator on Slack & Web
  • SVE-Optimized Matrix Multiplication
  • Java Painting GUI
  • User-Book Read and Rating Prediction for Recommendar System
  • Simulation of OS Components - CPU & I/O Task Scheduler, Memory & Disk, File System

Personal Projects

Gravitas: A 2D Tower Defense Indie Game

• An indie game for the VGDC game jam @ UCSD, in a great team of 2 programmers and 1 writer.

• Featured a gravity-based battlefield, where units have weights that influences the land's balance.

• Units and projectiles now affected by gravity, leading to a more fun and strategic tower defense experience.

  Act as a saviour to save the world of magic, restoring the balance between light and darkness. Summon all heroes from the ancient past to fight against the wicked enemies.

• (And...I also contributed to some Easter egg's art assets!)

Shared Canvas: An In-person Collaboration App on iOS/iPadOS

• Focused on small groups of in-person meetings.
• Consists of Canvas List view, Connection view, Canvas view, and various pop-ups for canvas settings, color picker, and scribble / eraser / shape tool customizations.
• Share current canvas with nearby people, or join nearby sessions.
• Utilized Multi-Peer Framework for canvas hosting / data synchronization between endpoints.
• Leveraged Codable data structure to persist and transfer canvases using JSON or Swift Data.

Prototype (Left) and Running on a real device (Right)

Faruzan Senpai: A Discord Bot for My Private Server, integrating AI / LLM Features

• A Discord Bot for my private server need (multilingual support is planned), such as:
  • Daily AI summary for registered guild channels
  • LLM chats
  • User's daily luck
  • Game server time getter
  • Slash Command stats
  • Basic game Wiki inquiry
  • User Title system
  • ...
• Now on AWS with a local PostgreSQL database.
• Other features:
  • Redis cache layer
  • Enhanced User Title system
  • Spotify/NetEase Music integration (planned)

Scheduled daily AI summary for a text channel of my guild, with discord links to source messages

Some other command responses (title system)

MC Marketplace: Prototype of a Game Item Marketplace on Ethereum

• Designed a smart contract which later deployed on Ethereum's Test Network.
• Implemented a simple front end for the marketplace with connection to MetaMask wallet and ABI's of the smart contract.
• Validated real-world blockchain connection and trades on Sepolia Test Network through Alchemy.

Marketplace with test items

Inventory with item status & Putting Item #9 off sale

iOS/iPadOS mini Apps

• A set of iOS Apps that practices my skill. Mostly based on SwiftUI and MVVM principle, with some UIKit and MapKit hacks.

  1. Spelling Challenge
     • A word-spelling game for 3 languages (en_US, fr_FR, de_DE).
     • Support 5~7 candidate characters (with bonus and in different layouts), history, shuffle, hint, and restart.
     • Beautiful UI in both light & dark mode.
     

     Solving a 7-char game in dark mode

     
     
     
  2. Pentominoes
     • A puzzle game in which player needs to form different patterns using all pentominoes.
     • Support reset and auto-solve.
     • Fluent and beautiful animations based on gesture and piece status.
     

     Before and after solved (simulated on 11' and 12.9' iPad Pro)

     
     
     
  3. Campus Map
     • A campus map with data of all on-campus buildings.
     • Support favorites, search, filter, data persistence across launches, pins and pop-ups, and step-by-step routing between 2 buildings or from / to current location.
     

     Map overview; Building detail and buttons; Route planning; and Step-by-step routing.

     
     
     
  4. Pokédex
     • A Pokémon collection with attribute inquiry, ancestor and successor, and “captured” labels.
     • Dynamically render transition color, index, and status in both List and Detail Views.
     

     Home screen; Detail View; List of Fire Pokémons; "Our favorite!"; Ancestor and successor.

Minecraft Mod Localizations

• Localized a bunch of Minecraft Fabric Mods.
• Report bugs & submit PR's while examining mod logics (for better translation and writing Wiki).
  
  

Courseworks

Disney BSDF for La Jolla Renderer

• Utilized C++ std::variant pattern to implement Disney BSDF materials in La Jolla renderer:

  1. Diffuse with subsurface
  2. Metal
  3. Clearcoat
  4. Glass
  5. Sheen

• Converted a self-made Blender scene to La Jolla and rendered correctly.

  
  
  

  

  A rendered self-made Blender scene using DisneyBSDF.

  

  Volumetric version of the scene above.
  Foggy air, a blue volumetric interior of the ice cube, and a softer ice cream ball.

  

  A rendered sample using DisneyGlass material

LLM-powered Emoji-to-Text Translator on Slack & Web

• With my great team members, developed a full-stack translation platform using FastAPI and React, accelerated development lifecycle by ~40% through AI-assisted planning and auto test suite integration.
• Engineered a high-concurrency "Model Racing" architecture using Python Asyncio to parallelize requests across LLMs, reducing P99 latency by >300ms to meet 1-second RAIL performance standards.
• Designed a lightweight RAG (Retrieval-Augmented Generation) system using sentence-transformers and local vector search, improving per-user accuracy by adding user’s feedback as context to LLM prompt.
• Built modular RESTful APIs for translation and feedback. Ensured scalability and deployability via Docker.
  
  
  
  

  Slack App & Web App showcases

SVE-Optimized Matrix Multiplication

• Implemented and modified BLISlab GEMM blocking algorithm in C.
• Improve row-major matrix multiplication efficiency, reducing cache misses on AWS EC2 Ubuntu machines by more than 33%.
• Accelerated microkernel by 4x with ARM SVE, loop unrolling, and pointer techniques (comparing to naïve).

Java Painting GUI

• A Painter GUI implemented using Java with SpringLayout.
• Support 1st / 2nd colors, different shapes and lines, and options including stroke parameter, filled, gradients, and dashed.
  
  

  My masterpiece of a beautiful scenary!

User-Book Read and Rating Prediction for Recommendar System

• Predict whether a user reads a book in various approaches and compared their performance, including:
  • Logistic Regression
  • Bayesian Personalized Ranking (Implicit)
  • *Trivial thresholds based on Popularity & Jaccard / CosineSet Similarities
• Predict a user's rating on a given book:
  • *BiasOnly Latent Factor Model (Surprise, Tenserflow, & PyTorch)
  • Latent Factor Model w/ Dimensionality Reduction (Tensorflow)

Simulation of OS Components - CPU & I/O Task Scheduler, Memory & Disk, File System

• Used C to emulate the following components:
  • multi-threaded CPU/IO task schedulers,
  • disk and virtual memory access with support of TLB and second-level page table, and
  • a file system with symbolic links and security constraints.