Who is rentonhead?
rentonhead is the global creative and technical identity of Hasan Cemil Acar.
About
Hasan Cemil Acar is an Art Director & Programmer working as rentonhead.
He combines product design, visual direction and software development to take digital products from identity to working code.
Hasan works between Istanbul and Moscow with clients and collaborators internationally. His practice includes native iOS development with Swift and SwiftUI, React and Next.js web engineering, React Native mobile products, commerce systems and custom WordPress development.
On the creative side, he works with Figma and Adobe tools across product interfaces, brand systems and App Store presentation. On the technical side, he designs maintainable component systems, application architecture and the production path needed to ship.
rentonhead is the global personal practice — not a full-service agency. Turkish personal work and profile content are published separately, while business software and local digital services in Türkiye are represented by RentonDiji.
Entity notes · FAQ
Direct answers
What does Hasan design and build?
Native iOS apps, digital product interfaces, modern web products, commerce systems, custom WordPress tools and App Store visuals.
Which technologies are used?
Swift, SwiftUI, TypeScript, React, Next.js, React Native, Node.js, PHP, WordPress, WooCommerce, PostgreSQL, MySQL and Redis, chosen to match the product.
Does rentonhead work internationally?
Yes. The practice is based between Istanbul and Moscow and is available for selected international projects.
How are the three websites related?
rentonhead.dev is the global practice, HasanCemilAcar.com.tr is the Turkish personal portfolio, and RentonDiji serves businesses in Türkiye.