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Jay Lee

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Senior Ruby on Rails Engineer

Seasoned Ruby on Rails engineer with 10+ years of experience building scalable, production-grade web platforms across e-commerce, healthcare, government, hyperlocal services, and judicial systems.

Specialized in Ruby on Rails backend architecture with strong frontend experience. Proven ability to design high-concurrency systems, refactor complex legacy platforms, and deliver reliable, maintainable solutions across multiple complex domains.

📧 lilee501@gmail.com | 📄 Download Resume | 💻 GitHub | 🔗 LinkedIn

  • Distribution E-commerce Platform

    • The Distribution E-commerce Platform was a high-concurrency social commerce system focused on group buying, flash sales, and a three-level referral distribution model.
    • The platform leveraged WeChat-based social networks as the primary growth and sales channel. Group leaders promoted exclusive, limited-quantity products within private groups, driving highly synchronized purchase behavior during flash sale events.

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  • Online Hospital System

    Cloud-based internet hospital platform with doctor scheduling, online diagnosis, HIS integration, and secure medical workflows.
    A cloud-based telemedicine platform enabling:

    • Online patient registration & login
    • Appointment booking & payment
    • Real-time video consultation
    • Electronic prescriptions & medication purchasing

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  • Hyperlocal Services Platform

    A comprehensive Hyperlocal Ecosystem combining E-commerce, Professional Networking, and Community Engagement.

    • Product & Service: Exclusive discounts, coupons for hotels, flights, gyms, restaurants, and entertainment
    • Resource Monetization: Platform for users to leverage valuable personal or professional connections
    • Community: Social circles for user interaction, content sharing, and engagement

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  • Government Procurement & Bidding Platform

    • The Government Procurement & Bidding Platform was a large-scale public-sector system designed to support government purchasing and competitive tendering workflows.
    • The system served government departments, suppliers, and enterprises, aiming to improve procurement efficiency, transparency, and regulatory compliance through digitalized workflows.

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  • ShopperPlus.ca (E-commerce Platform)

    ShopperPlus.ca is a full-featured e-commerce platform selling:

    • Printers & peripherals
    • Mobile phones, computers, cameras, and accessories
    • Daily consumer goods

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  • Court Case Management System (Judicial Platform)

    The Court Case Management System is a judicial case-handling platform designed to digitize, automate, and optimize the entire lifecycle of court proceedings. The system significantly reduced manual workload for court staff by:

    • Automating document ingestion and structuring
    • Digitizing case filing and trial preparation workflows
    • Assisting judges in legal research, judgment drafting, and case review
    • Enabling knowledge reuse through structured archival

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Selected Experience Highlights

  • Designed and stabilized high-concurrency systems handling 4,000+ QPS during flash sales and burst traffic scenarios
  • Led end-to-end system architecture for complex platforms spanning e-commerce, healthcare, government procurement, and judicial systems
  • Successfully refactored and modernized legacy monolithic Rails systems, significantly improving stability and maintainability
  • Delivered regulatory-compliant systems used in real-world hospitals, courts, and government departments
  • Frequently acted as technical owner, independently handling requirement analysis, system design, stakeholder communication, and delivery
  • Experienced in both startup-scale rapid iteration and enterprise / public-sector long-cycle projects

Skills Snapshot

Languages - Ruby, JavaScript

Backend & Architecture

  • Ruby on Rails
  • High-concurrency systems & performance optimization
  • Legacy monolith refactoring and system decomposition

Frontend

  • React.js (SPA, admin dashboards)
  • Frontend–backend separation architecture

Databases & Search

  • PostgreSQL, MySQL
  • Redis
  • Elasticsearch

DevOps & Infrastructure

  • Docker, Kubernetes
  • GitLab CI/CD, GitHub Actions
  • Nginx
  • AWS & Alibaba Cloud