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tianxuansun/README.md

Hi, I'm Luke Sun 👋

M.S. Computer Science @ Duke University | Software Engineering & Data Science

LinkedIn Portfolio

🚀 About Me

I am a graduate student at Duke University (May 2027) with a background in Software Engineering and Data Science. I specialize in building scalable microservices, real-time data pipelines, and fine-tuning LLMs for production environments.

  • 🔭 Currently working on: Distributed systems and high-performance FastAPI microservices.
  • ⚡ Past Experience: Software Engineering Intern @ SANY, Risk Management @ Alibaba.
  • 🎓 Education: M.S. CS @ Duke (4.0/4.0), B.S. Data Science @ Duke.

🛠 Tech Stack

Languages & Backend

Python SQL FastAPI Node.js TypeScript

Data Science & ML

PyTorch TensorFlow Scikit-Learn HuggingFace

Infrastructure & Tools

AWS Docker Kubernetes GitHub Actions

🌟 Featured Projects

🏗 Study Group Matcher (Backend/SDE)

FastAPI | PostgreSQL | Docker | AWS

  • Built an async microservice for course-specific student matching with indexed relational schemas.
  • Implemented 25+ async unit tests (80% coverage) and automated deployment via CI/CD to AWS EC2/ECS.
  • Configured CloudWatch metrics and alarms for system observability.

🛡 CrowdScreen (Full-Stack/SDE)

Nuxt 3 | Socket.IO | MongoDB | Kubernetes

  • Designed a live content moderation queue with a real-time rules engine.
  • Integrated Playwright E2E testing and gated PRs using GitHub Actions.
  • Orchestrated container deployment using Kubernetes manifests.

📈 iPhone 14 Sentiment Pipeline (Data Science/ML)

BERT | PyTorch | Tableau

  • Fine-tuned BERT for sequence classification on 126k tweets (F1 = 0.89).
  • Published results in ICIHCS conference proceedings.
  • Automated data ingestion and cleaning for stakeholder-ready Tableau dashboards.

"Turning complex data into actionable code."

Pinned Loading

  1. study-group-matcher study-group-matcher Public

    A clean, well-tested FastAPI microservice that I built to form small, stable study groups from student availability — with course enrollments, matching, stats, and CSV exports.

    Python 3

  2. Retailrocket-wasserstein-flows Retailrocket-wasserstein-flows Public

    Forecast short-horizon catalog attention on item graphs using CTMC + Wasserstein drift–diffusion (Retailrocket).

    Jupyter Notebook 1

  3. crowdscreen crowdscreen Public

    Full-stack Nuxt app for real-time content review—MongoDB models, JWT auth, rule engine, Socket.IO updates, and Kubernetes-ready deploys.

    HTML

  4. rate-limiter-gateway rate-limiter-gateway Public

    Redis-backed token-bucket rate limiter gateway with FastAPI, Prometheus metrics, Docker Compose, CI, and k6 load testing.

    Python