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Helenyixuanwang/README.md

Hi, I'm Helen (Yixuan Wang) 👋

Software Engineer | MS Computer Science @ Northeastern University (May 2026), passionate about building scalable backend systems and applying ML to real-world problems. My journey started at Coding Dojo in 2021, where I completed three full-stack tracks in JavaScript, Java, and Python Django — and loved it enough to come back as a Teaching Assistant in 2023.

🔧 What I Build

  • Distributed Systems — microservices, replication, CAP theorem, RabbitMQ messaging
  • NLP & ML — transformer fine-tuning (DeBERTa, RoBERTa), text classification
  • Full-Stack — React, Vite, Express.js, MongoDB, MySQL, Django, FastAPI
  • LAMP Stack — PHP, Apache, MySQL, Docker
  • Background Tasks — Celery, BullMQ, Redis, automated scheduling
  • DevOps — Docker, Kubernetes, HPA, AWS ECS Fargate, ALB, ECR, Railway, Vercel
  • AI & LLM APIs — Anthropic Claude API, streaming responses, real-time token delivery

🛠️ Tech Stack

Java Python JavaScript TypeScript PHP React Vite Next.js Supabase Tailwind CSS Django FastAPI NestJS Spring Boot Node.js Express Docker Kubernetes AWS Amazon ECS PostgreSQL MySQL MongoDB Redis Material UI Apache Railway Vercel Anthropic

📌 Featured Projects

Project Description Tech
WebCrawler Full-stack web crawler with BFS crawling, content extraction, change detection, scheduled re-crawls, and Kubernetes deployment with HPA — deployed on Railway + Vercel FastAPI, Celery, Redis, PostgreSQL, React, Docker, Kubernetes
Product Catalog API FastAPI REST API containerized with Docker, deployed to AWS ECS Fargate with Application Load Balancer across multiple Availability Zones — infrastructure managed via AWS CLI FastAPI, Docker, AWS ECS, ECR, ALB, CloudWatch, Python
Warehouse Dashboard Real-time warehouse task dashboard with priority job queue, background workers, retry with exponential backoff, and live status updates — deployed on Railway NestJS, BullMQ, Redis, PostgreSQL, React, TypeScript, Material UI
ClientPulse Client project tracker with auth, per-user RLS, task management, and feedback board — deployed on Vercel Next.js, TypeScript, Supabase, PostgreSQL, Tailwind CSS
AI Chatbot Streaming AI assistant with real-time token delivery, multi-turn conversation history, and terminal dark UI — deployed on Vercel Next.js, TypeScript, Tailwind CSS, Anthropic Claude API
Classic Reads Classic literature browser — search and read 70,000+ public domain books from Project Gutenberg Vite, React, TypeScript, Tailwind CSS, Gutenberg API, Vercel
Flavor Atlas Kid-friendly world food explorer — browse recipes by region & category with meal details and YouTube tutorials Vite, React, TypeScript, Tailwind CSS, TheMealDB API, Vercel
YA Books Explorer Young Adult book discovery app — browse by genre, search by title or author, powered by Google Books API Vite, React, TypeScript, Tailwind CSS, Google Books API, Vercel
Job Tracker Full-stack job tracker with auth, PDF export, REST API, Celery email summaries — deployed on Railway Django, FastAPI, Celery, Redis, PostgreSQL, Docker
History Heroes Kid-friendly biography explorer — famous people born on today's date, live Wikipedia API, daily rotating cards Vite, React, JavaScript, Wikipedia API, Vercel
E-Commerce Microservices 15-service system with RabbitMQ, AWS ECS Fargate, ALB Java, Spring Boot, Docker, AWS
Distributed KV Store Leader-follower & leaderless replication with tunable W/R/N Java, Docker
Sudoku Dojo Full-stack app with REST API, MongoDB Atlas, bcrypt auth Node.js, Express, React, MongoDB
SpendWise LAMP expense tracker with MVC refactor branch and stored procedures PHP, MySQL, Apache, Docker
LLM Paraphrase Detection 4-way text classification with DeBERTa, ensemble methods Python, HuggingFace

🏆 Certifications

AWS Cloud Practitioner Microsoft Certified: Azure Data Fundamentals DP-900

📍 Location

Vancouver, BC

📫 Let's Connect

LinkedIn

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