I am
Wing Yin
Full Stack Developer.
Based in Hong Kong • Available for opportunities
AI & Full Stack Developer
Hey! Thanks for visiting my portfolio, I appreciate it!
I'm a full-stack developer with a passion for building scalable digital solutions and AI integration. I specialize in React, Node.js, and creating intelligent applications that deliver seamless user experiences.
What i do.
I've been coding professionally for 9 years now and currently work as a Python-focused engineer with a strong passion for AI & LLM integration, data-driven backends, and intelligent automation — shipped end to end as full-stack products.
Here are the key technologies that power my development journey .
- Python (Django / FastAPI)
- AI / LLM Integration
- Data & ML (Pandas / NumPy)
- ML Integration & MLOps
- REST & GraphQL APIs
- PostgreSQL & Redis
- Docker & AWS
- React & Next.js
Places i’ve worked.
Since 2017, I've had the privilege to work with several companies and clients that have enabled me to hone my skills and talents in full-stack development and AI integration. These experiences have shaped my passion for building scalable digital solutions. Currently I am working as a Freelance Developer delivering AI-powered applications worldwide.
Some of my works.
Check out some of the full-stack applications and AI-powered platforms I've built as a freelance developer, showcasing my expertise in React, AI integration, and modern web technologies.
AI platform that analyzes strata and condo documents for real estate professionals. Built a FastAPI backend with a Retrieval-Augmented Generation pipeline over PostgreSQL/pgvector, using OpenAI for summarization and Celery workers for async document processing. Nuxt frontend, Stripe for payments, deployed on AWS with Cloudflare.
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AI photo tool for real estate listings that generates staged rooms, improves lighting, and enhances image quality. Built the Python (FastAPI) inference service orchestrating diffusion and image-enhancement models on GPU workers, with a Celery/Redis job queue. React frontend, Supabase for user management, Stripe for credits and payments.
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Platform for managing and sharing condo/HOA documents with secure storage and access control. FastAPI backend handling document ingestion, role-based access, and pre-signed storage links over PostgreSQL. React + TypeScript frontend, Supabase for auth, Stripe for subscriptions.
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All-in-one AI creative platform that generates images, videos, and artwork from text prompts. Built the Python backend orchestrating multiple generative models (Stable Diffusion and video pipelines) behind a FastAPI service, with a Celery/Redis queue managing GPU inference jobs, prompt customization, and output delivery at scale.
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Smart digital sign-in and lead capture system for real estate open houses. Django REST backend powering visitor capture, CRM integrations, and automated follow-up workflows via Celery, with real-time open-house analytics. Offline-capable forms, customizable fields, and event-based lead generation.
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FNEL (Funnel + Analytics) is a lightweight, privacy-friendly analytics tool for solo founders and small startups. Built a FastAPI event-ingestion API and a Pandas-based aggregation pipeline that turns raw traffic into funnel, conversion, and behavior metrics, surfaced through a minimal dashboard.
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AI-driven music generator that creates royalty-free background tracks for videos, games, and creative projects. Built the Python generative-audio backend running PyTorch models behind a FastAPI service, with an async generation queue that renders unique compositions from user-selected moods, genres, and durations.
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Platform providing structured player and sports data with detailed stats and insights. Built the Python data pipeline (Pandas/NumPy) that ingests, cleans, and normalizes raw sports data, exposed through a FastAPI service. React frontend, Strapi for content, Stripe for subscriptions.
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