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JiaCheng2004/README.md

JiaCheng Liu



Systems-oriented engineer who ships end-to-end — from database schema through deployment and observability.

While most engineers my level build CRUD apps, I build AI infrastructure, real-time collaboration engines, and microservices platforms.


 

 



Open to Entry Level & New Grad Opportunities  |  Open to discuss Startups & Collaborations




Education

University of California, Santa Cruz — Computer Science B.S. 2022–2025


What I Ship

Every project below is architected, tested, deployed, and documented. No tutorials. No toy apps.

Stateless Multi-Modal AI Gateway

Config-driven gateway routing requests across 29 providers (OpenAI, Anthropic, Google, Bedrock, ByteDance, DeepSeek, Mistral, Ollama, and more) with multi-modal support — chat, video, audio, music, images, embeddings, realtime audio sessions. Built-in control plane for projects, virtual keys, policies, budgets, and MCP bindings. Graceful degradation: SQLite → PostgreSQL, in-memory → Redis, provider failover chains.

Go Gin PostgreSQL SQLite Redis Prometheus OpenTelemetry WebSocket Docker

Anime Short Video Platform

Cassandra-backed media ingest with idempotent writes and background transcoding. Cloudflare CDN edge delivery with signed URLs — 92% cache hit ratio. SwiftUI gesture feed with prefetching and backpressure — dropped frames under 1% on mid-tier iPhones. p99 player startup under 320 ms at 10k RPS.

Swift SwiftUI Spring Boot Cassandra Cloudflare CDN S3 XCTest

Real-Time Collaborative Notepad

Anonymous collaborative editing with CRDT-based sync. Lexical rich-text editor + Yjs, Go WebSocket backend, room-based sessions. Deployed on single VPS with Caddy.

Go React 19 Next.js 16 Yjs Lexical WebSocket

Online Co-op Survival Game

Unity 6 with host-authoritative multiplayer via Netcode for GameObjects, Relay for NAT traversal, Vivox proximity voice, Addressables for async scene loading, and KINEMATION for first-person animation.

Unity 6 C# Netcode for GameObjects Relay Vivox KINEMATION




Tech Stack


Languages

Frameworks & Platforms

Cloud & Infrastructure

Databases & Messaging

Observability & Testing

APIs & Protocols

AI / ML

Game Development




Stats


  







Pinned Loading

  1. ChessGame ChessGame Public

    Chess Game online

    C++ 4

  2. marong marong Public

    Discord Bot for AIMS ESPORTS

    C++ 8

  3. Translator Translator Public

    C++ 3

  4. SimonZhao7/Smokescreen SimonZhao7/Smokescreen Public

    JavaScript 4

  5. SimonZhao7/JBS SimonZhao7/JBS Public

    Vue 2 1

  6. marong-website marong-website Public

    The official website for marong

    TypeScript 1