Ashutosh Singh - Software Engineer Portfolio

A modern, secure and high-performance portfolio website showcasing professional experience, education, projects, and GitHub contributions.

Features

Content Features

• Responsive design that works on desktop, tablet, and mobile devices
• Professional education section with institution logos
• GitHub statistics with real-time data
• Dynamic news ticker for latest achievements
• Internship & experience showcase
• Education timeline with institutional branding
• Project portfolio with interactive previews
• Tech stack and skills visualization
• Coding profiles integration (GitHub, LeetCode, CodeForces)

Technical Features

• Security & Privacy

  • Strong Content Security Policy (CSP)
  • Protection against XSS attacks and clickjacking
  • Subresource Integrity (SRI) for external resources
  • Advanced sanitization of dynamic content
  • Secure external links (rel="noopener noreferrer")
  • Permissions Policy limiting access to sensitive browser features

• Performance Optimizations

  • Smart caching strategy with automatic version management
  • Critical CSS inlining for faster initial rendering
  • Resource preloading for key assets
  • Progressive image loading with fallbacks
  • Service Worker for offline capability
  • Lazy loading of non-critical resources

• User Experience

  • Enhanced mobile menu animations
  • Improved scrolling behavior
  • Streamlined navigation
  • Smart error handling with graceful fallbacks
  • Animation performance optimizations

• Developer Experience

  • Modular JavaScript architecture
  • Centralized version management
  • Automated cache invalidation
  • Clean, semantic HTML structure

Technologies Used

• Core Technologies

  • HTML5 with semantic markup
  • CSS3 with modern features (Grid, Flexbox, Variables)

• Vanilla JavaScript with ES6+ features

• Performance & Security

  • Service Workers for offline capabilities
  • Intersection Observer API for efficient animations
  • Content Security Policy (CSP)
  • LocalStorage/SessionStorage for state management
  • Cache API for resource management

• External Integrations

  • GitHub REST API for profile data
  • Font Awesome for iconography
  • Custom GitHub stats widgets

Project Structure

portfolio-site/
│
├── index.html          # Main HTML file with structured content and security headers
├── styles.css          # CSS styles with optimized loading
├── script.js           # Modern JavaScript with modular architecture
├── sw.js               # Service Worker with advanced caching strategies
└── README.md           # Comprehensive project documentation

Security Features

Content Security Policy (CSP)

A strict CSP that allows content only from trusted sources:

• Scripts only from same origin and cdnjs.cloudflare.com
• Styles from same origin and cdnjs.cloudflare.com
• Images from specific trusted domains
• No inline scripts allowed (except those with nonces)
• No dangerous eval() or Function constructors

Protection Headers

• X-Frame-Options: Prevents clickjacking attacks
• X-Content-Type-Options: Prevents MIME type sniffing
• Referrer-Policy: Limits information leakage
• Permissions-Policy: Restricts access to sensitive browser features
• Strict-Transport-Security: Enforces HTTPS connections

Link Protection

• All external links use rel="noopener noreferrer"
• Protection against tabnabbing attacks

Content Sanitization

• HTML content is sanitized before rendering
• Allowlist-based approach for HTML tags and attributes
• Safe DOM manipulation helpers prevent XSS vulnerabilities

Performance Optimizations

Resource Loading

• CSS preloading for critical resources
• Efficient font loading strategy
• Optimized image loading with width/height attributes
• Preconnect hints for external domains

Caching Strategy

• Multiple cache levels for different resource types:
  • Network-first for HTML/CSS/JS (always fresh)
  • Cache-first for static assets (images, icons)
  • Stale-while-revalidate for fonts and API data

Version Management

• Centralized version control for resources
• Automatic cache invalidation on deployments
• Clean version transition without page reloads

Getting Started

1. Clone the repository

   git clone https://github.com/ashutosh-engineer/Portfolio-Software-Engineer.git
   

2. Open index.html in your browser or use a local development server

Deployment

This website can be deployed on any web hosting service or platforms like:

• GitHub Pages
• Netlify
• Vercel
• Any traditional web hosting

Browser Support

This portfolio website is compatible with all modern browsers including:

• Chrome
• Firefox
• Safari
• Edge

Contact

Ashutosh Singh - LinkedIn GitHub: https://github.com/ashutosh-engineer