Den

Freelance Web Developer

Denis Casian • Freelance

Dec 2020 - Present • 5 yrs 5 mos

Freelance web developer specializing in building custom websites and web applications from scratch using HTML, CSS, and JavaScript. After a few years away, I'm back in business with more experience, sharper skills, and a portfolio of live, production-ready projects. WHAT I DO: • Build fully custom, hand-coded websites – no WordPress, no templates • Develop Progressive Web Apps (PWA) with offline support and installable functionality • Integrate Firebase Firestore for real-time databases and user management • Implement subscription/license systems using Payhip synced with Firestore • Create responsive, mobile-first designs with modern UI/UX • Optimize websites for speed and SEO performance KEY PROJECTS DELIVERED: 1. Movie Discovery & Streaming Web App (movies.deniscasian.com) – Browse, search, and watch movies with Firestore subscription system 2. 200+ Online Tools Suite PWA (tools.deniscasian.com) – Massive tool collection working offline, Payhip subscription for ad-free experience 3. QR Code Generator PWA (qr.deniscasian.com) – Offline QR generator with Payhip premium subscription 4. AI Hub Platform PWA (aihub.deniscasian.com) – Multi-tool AI platform with offline support and premium subscriptions TECHNICAL EXPERTISE: • Frontend: HTML5, CSS3, JavaScript (ES6+) • PWA: Service Workers, Cache API, Web App Manifest • Database: Firebase / Firestore • Monetization: Payhip/Gumroad license integration • Design: Responsive, Flexbox, CSS Grid, animations • Other: Python (standalone apps), Git, SEO ACHIEVEMENTS: • Built 200+ individual web tools in a single PWA platform • All projects are live and production-ready • Implemented fully automated license verification systems • Created PWAs that work 100% offline with complete asset caching • Maintained clean, well-structured, maintainable codebases Full portfolio: deniscasian.com