Building production-ready AI-powered applications with modern web technologies

Live Demo: https://ai-document-analyzer-ea.vercel.app

Upload any PDF and get instant AI-powered structured analysis — summaries, key entities, dates, obligations, risk flags, and action items.

Tech Stack:

• Next.js 16 (App Router + Turbopack)
• TypeScript (strict mode)
• Claude Sonnet 4.5 API
• Tailwind CSS + shadcn/ui
• Vercel (Production)

Key Features:

• ⚡ Real-time PDF processing with unpdf
• 🤖 AI-powered document analysis (Claude API)
• 🎨 Responsive dashboard with color-coded insights
• 🔒 Dual-layer rate limiting (cost protection)
• 🧪 667 tests with 93.6% coverage
• 📊 Export JSON results
• 📱 Mobile-first responsive design

Impact:

• Production-ready with ~$0.45/month API costs (demo mode)
• 96% cost reduction through intelligent rate limiting
• WCAG 2.1 Level A/AA accessibility compliance

🔗 View Live Demo | Source Code

Full Stack Developer @ US-based Legal Tech Company Building AI-powered document processing and workflow automation systems

Previous: Hospital HRIS System Production deployment: React + Node.js + MongoDB + Cloud Hosting

• Employee dashboards with biometric attendance integration
• Multi-level approval workflows with role-based access control
• Deployed on Render and Vercel

• 🤖 Building AI-powered document processing systems with Claude and OpenAI APIs
• 🚀 Developing enterprise workflow automation tools
• 📚 Mastering Next.js 16 App Router and React Server Components
• 🧪 Implementing comprehensive TDD workflows (80%+ coverage)
• 🔒 Building cost-effective, production-ready AI applications with smart rate limiting

const elmarAngao = {
  role: "Full Stack Developer",
  specialization: "AI Integration & Document Processing",

  expertise: {
    frontend: ["Next.js 16", "React", "TypeScript", "Tailwind CSS", "shadcn/ui"],
    backend: ["Node.js", "Express", "Next.js API Routes"],
    ai: ["Claude API", "OpenAI API", "RAG Systems", "Prompt Engineering"],
    architecture: ["App Router", "Server Components", "API Design", "Rate Limiting"],
    testing: ["Vitest", "React Testing Library", "TDD", "93.6% Coverage"],
    deployment: ["Vercel", "Render", "AWS", "CI/CD"]
  },

  currentFocus: [
    "Building production-ready AI applications",
    "Cost optimization for AI APIs",
    "Enterprise workflow automation",
    "Comprehensive testing strategies"
  ],

  availableFor: ["Freelance Projects", "AI Integration Consulting", "Next.js Development"]
};

Status: ✅ Live in Production URL: https://ai-document-analyzer-ea.vercel.app Impact: 667 tests, 93.6% coverage, $0.45/month API costs Tech: Next.js 16, TypeScript, Claude API, Tailwind, Vercel

Status: ✅ Production Features: Employee dashboards, biometric attendance, approval workflows Tech: React, Node.js, Express, MongoDB, Cloud hosting

I'm available for:

• 🤝 Freelance Projects — AI integration, Next.js development
• 💼 Consulting — Document processing systems, workflow automation
• 🎓 Mentoring — Full-stack development, AI APIs, testing best practices

Contact:

• 📧 Email: elmarcera@gmail.com
• 💼 LinkedIn: linkedin.com/in/elmar-angao
• 🌐 Live Demo: ai-document-analyzer-ea.vercel.app

💙 Thanks for visiting! If you find my work interesting, feel free to ⭐ star my repositories!

Last updated: March 2026