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KhalDragonFeng/README.md

Hi there, I'm Qifan Feng (Architect Feng) 👋

I am a Senior Full-Stack Architect & DevOps Specialist with 8 years of professional software engineering experience. I specialize in building secure, high-concurrency SaaS applications, cost-optimized cloud architectures, and highly modular decoupled systems.

🔒 Private & Public Production Work

Most of my daily commercial development is built inside private enterprise repositories (including multi-tenant benefits SaaS platforms, high-concurrency KOL matchmaking engines, and commercial mini-games).

However, you can explore my public engineering showcases, architectural case studies, and live production configurations via the links below:

🛠️ Tech Stack & Capabilities

  • Backend Engineering: Java | Spring Boot | Spring Cloud | MyBatis Plus | ShardingSphere | Redis | RabbitMQ | MySQL
  • Full-Stack Web: Next.js (14-16) | React | TypeScript | tRPC | Prisma ORM | PostgreSQL | Tailwind CSS | Stripe
  • Cloud & Infrastructure: AWS (ECS Fargate, RDS PostgreSQL, ALB, S3, IAM) | Docker | Nginx | GitHub Actions (OIDC) | Cloudflare
  • Game Systems Development: Cocos Creator 3.8 | TypeScript | WeChat Mini Game SDK | CloudBase Serverless

📊 Telemetry Metrics & Achievements

  • SaaS Architecture: Solo-designed a Next.js monorepo platform with 55 relational data models and a custom Multi-LLM AI routing engine.
  • Cloud Cost Optimization: Rescued and migrated a client financial portal to AWS ECS Fargate, supporting 100+ concurrent users under a $100/month cloud budget (>90% cache hit rate).
  • High-Concurrency Backend: Architected a KOL match engine handling 500K+ daily matches with 99.97% accuracy using database sharding and message queues.

📩 Let's Connect

Feel free to reach out for architectural consulting, DevOps setups, or full-stack web applications at outprintfeng@gmail.com.

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  1. nextjs-saas-starter nextjs-saas-starter Public

    Production-grade Next.js SaaS starter with auth, dashboard, Prisma ORM, and Tailwind CSS.

    TypeScript 1

  2. portfolio portfolio Public

    Production-ready deployment scaffold for AI-generated web applications

    HTML 1

  3. spring-kol-match-engine spring-kol-match-engine Public

    High-concurrency KOL matchmaking engine with cosine-similarity scoring, Redis caching, RabbitMQ async processing, and Swagger API docs. Built with Spring Boot 3, MyBatis Plus, and H2/MySQL.

    Java 1