I build websites, backend systems, databases, AI applications, automation tools, and full-stack software products.

I am a software engineering-focused developer who enjoys building complete products from idea to deployment.

My work covers multiple areas of software development:

• Website design and full-stack web development
• Frontend UI implementation
• Backend API development
• Database design and integration
• Authentication, subscription, and payment systems
• AI application development and agent workflows
• Data processing and automation tools
• Financial technology and market data systems
• Cloud deployment and production-oriented engineering

I am not limited to one narrow technical area.
I focus on learning fast, building real systems, and turning ideas into usable software products.

I can build complete web applications including frontend, backend, database, authentication, and deployment.

Skills involved:

• Landing pages
• Dashboard UI
• API integration
• User authentication
• Database-backed applications
• SaaS-style product architecture
• Payment and subscription flows
• Deployment to production

I design backend systems that connect frontend products with real data and business logic.

Skills involved:

• REST API design
• Database schema design
• Authentication and authorization
• API key systems
• Subscription and entitlement logic
• Data validation
• Error handling
• Backend service structure

I build AI-powered software that connects language models with real tools, data, and workflows.

Skills involved:

• AI agent workflows
• LLM tool calling
• Research automation
• Report generation
• Data-driven AI analysis
• AI-assisted decision systems
• Prompt engineering
• Multi-step reasoning workflows

I also build scripts and systems that collect, clean, transform, and validate data.

Skills involved:

• Python automation
• Data pipelines
• CSV / JSON / database processing
• Financial data modeling
• Data quality checks
• Scheduled jobs
• Dry-run and audit workflows

I build product-oriented systems that combine frontend, backend, database, authentication, payment, and deployment.

Skills involved:

• SaaS product architecture
• User account systems
• Subscription logic
• Payment integration
• API key management
• Usage-based product design
• Production deployment

A full-stack web product for Taiwan market data access.

Website:
https://twmarketdata.com

Key features:

• Next.js frontend
• Responsive website UI
• Auth.js authentication
• Prisma database integration
• PostgreSQL-backed user system
• API key and subscription management
• ECPay payment integration
• Vercel production deployment

Tech used:

• Next.js
• TypeScript
• React
• Prisma
• PostgreSQL
• Auth.js
• Vercel
• ECPay

A backend system for collecting, organizing, and serving Taiwan financial market data.

Key features:

• Official-first market data ingestion
• TWSE / TPEx / MOPS / TAIFEX / TDCC data handling
• PostgreSQL market database
• Backend read API
• Feature engineering workflows
• Data validation and freshness checks
• Controlled write and audit process

Tech used:

• Python
• PostgreSQL
• SQL
• Data processing
• Backend API design
• Financial data modeling

An AI-powered software system for stock research, analysis, backtesting, and report generation.

Key features:

• AI research workflow
• Stock analysis tools
• Financial data tools
• Technical indicator analysis
• Strategy comparison
• Backtesting
• Automated investment research reports

Tech used:

• Python
• AI agents
• LLM workflows
• Data tools
• Backtesting
• Financial analysis

I am interested in software engineering opportunities where I can build practical systems and products.

Areas I can contribute to:

• Website development
• Frontend development
• Backend development
• Full-stack product development
• API development
• Database-backed applications
• AI application development
• Automation tools
• Internal tools
• FinTech products
• SaaS platforms

My strengths:

• I can build from frontend to backend
• I can design websites and turn them into deployed products
• I can connect databases, APIs, authentication, and payment systems
• I can build AI tools that interact with real data
• I can learn new technologies quickly and apply them to real projects
• I care about making software usable, not only making code run

Full-stack web development
Backend API development
AI application engineering
Website deployment
Database-backed software
SaaS product development
Financial technology systems

I am open to internship, junior software engineer, frontend, backend, full-stack, AI application, and web development opportunities.