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timjtchang/README.md

Hi, I'm Tim Chang 👋

👨‍💻 About Me

  • Computer Engineering MS @ USC

  • Backend Engineer @ Crypto Arsenal (2024–2025)

    • Built Go payment gateway on AWS for ERC-20 transactions

    • Developed TypeScript HTX trading adapter (6K+ users)

    • Cut CloudWatch logs 64% via custom Fluent Bit parser

  • Software Engineer @ Realplus Tech (2019–2022)

    • Built Python backend for 4WS vehicle (ROS pub-sub)

    • Engineered Node.js drone backend with Blockly (500+ users)

🚀 Projects

  • Gaia Multi-Agent
    Hugging Face Assignment using LangGraph, featuring sub-agents for reasoning, web search, and file analysis.

  • Lemonaid GenAI System
    Fastener quoting platform powered by Gemini API, FastAPI, React (TS), PostgreSQL, AWS (Lambda, RDS, Cognito, S3)

  • QuantCore-Streamer
    Real-time OBI streamer for top-30 crypto assets using Kappa & CQRS via Kafka, Spark, Redis, gRPC, Websocket, Terraform

  • Fraud Risk Microservice
    Real-time fraud ingestion and scoring using Java with Spring Boot, DynamoDB, REST APIs

  • Banking Backend
    Banking operations backend using Go, PostgreSQL, and REST APIs

  • Player League
    Player/match handling system built with Node.js, MongoDB, and GraphQL

🛠 Tech Stack

Languages

Fullstack / Frameworks & Databases

DevOps & Testing

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  1. gaia_multiagent gaia_multiagent Public

    Hugging Face Assignment(Gaia Level 1) using LangGraph, featuring sub-agents for reasoning, web search, and file analysis.

    Python

  2. Thousand-Dollar-Group/Lemonaid-Public Thousand-Dollar-Group/Lemonaid-Public Public

    Fastener quoting platform powered by Gemini API, FastAPI, React (TS), PostgreSQL, AWS (Lambda, RDS, Cognito, S3)

  3. QuantCore-Streamer QuantCore-Streamer Public

    Real-time OBI streamer for top-30 crypto assets using Kappa Architecture and CQRS via Kafka, Spark, Python, Go, Redis, gRPC, Websocket, Terraform

    Python

  4. fraud-risk-microservice fraud-risk-microservice Public

    Real-time fraud ingestion and scoring using Spring Boot, DynamoDB, REST APIs

    Java