Security & Performance
Building Fast, Secure Web Applications That Users Trust
In today's digital landscape, security and performance aren't optional—they're essential. I build applications with enterprise-grade security practices and optimizations that deliver exceptional user experiences while protecting sensitive data.
David Fajardo
Full-Stack Developer • Security Enthusiast
90+
Lighthouse Score
Performance
<1s
Page Load
Average
99.9%
Uptime
Guaranteed
A+
SSL Rating
Security
Enterprise-Grade Security
Protecting your data at every layer
Security isn't just a feature—it's a foundation. Every application I build follows security-first principles, implementing multiple layers of protection from the database to the user interface. Whether you're handling customer data, processing payments, or managing sensitive business information, your application needs robust security measures that meet industry standards and regulatory requirements.
End-to-End Encryption
All sensitive data is encrypted using AES-256, the same encryption standard used by governments and financial institutions. Your information remains private and secure during transmission and storage, protecting against unauthorized access and data breaches.
OAuth 2.0 & JWT Authentication
Industry-standard authentication protocols protect user accounts with secure token-based sessions. Support for multi-factor authentication (MFA), social logins, and role-based access control ensures only authorized users can access sensitive features.
OWASP Compliance
Applications are built following OWASP Top 10 security guidelines, protecting against common vulnerabilities including SQL injection, Cross-Site Scripting (XSS), Cross-Site Request Forgery (CSRF), and security misconfigurations.
Secure Code Practices
Every line of code undergoes security review with input validation, parameterized queries, and proper error handling to prevent data leaks. Dependencies are regularly audited for known vulnerabilities.
Blazing Fast Performance
Speed that keeps users engaged
Website speed directly impacts user experience, conversion rates, and SEO rankings. Studies show that a 1-second delay in page load time can reduce conversions by 7%. That's why I obsess over performance optimization—from server response times to client-side rendering. Every millisecond matters when building products that compete in today's fast-paced digital market.
Lightning-Fast Load Times
Optimized builds with code splitting, lazy loading, and tree shaking deliver sub-second page loads. Every application achieves 90+ Lighthouse performance scores, ensuring smooth user experiences across all devices.
Optimized Database Queries
Efficient SQL queries with proper indexing, connection pooling, and intelligent caching strategies. Redis and in-memory caching reduce database load by up to 40%, ensuring fast response times even under heavy traffic.
Global CDN Distribution
Static assets are served from edge locations worldwide through Vercel Edge Network and Cloudflare. Users experience fast delivery regardless of their geographic location, with automatic failover for reliability.
Real-Time Monitoring
Continuous performance monitoring with automated alerts helps identify and resolve bottlenecks before they impact user experience. Integration with tools like Vercel Analytics and custom dashboards provide actionable insights.
My Security & Performance Checklist
Security
- HTTPS everywhere with SSL/TLS certificates
- Content Security Policy (CSP) headers
- Rate limiting and DDoS protection
- Input validation and sanitization
- Secure session management
- Regular security audits and updates
- Dependency vulnerability scanning
- Secure HTTP headers (HSTS, X-Frame-Options)
Performance
- Image optimization and lazy loading
- Code minification and compression
- Browser caching strategies
- Server-side rendering (SSR) where needed
- Database query optimization
- Automated performance monitoring
- Critical CSS inlining
- Resource prefetching and preloading
Tools & Technologies I Use
Ready to Build Something Secure & Fast?
Whether you need a security audit for your existing application or want to build a new product with performance and security baked in from day one, I'm here to help.