Every project here is live right now and used by a real business. Each page explains what was built, why, and which decision solved which problem — an engineering record, not a screenshot gallery.
Detailed case studies of five client systems by Hasan Cemil Acar, all running in production: Her Mutfak's online food ordering system (WooCommerce with meal-card payments), Castor Coffee's retail and B2B multisite store, Tekirdağ Sınav Koleji's school payment and SMS portal, Sisa Atelier's café POS and loyalty system, and Nest Worldwide's three-division corporate site. Each case covers the problem solved, the technical decisions made and the transferable lesson.
In software and design work, a screenshot says very little. A beautiful interface may be badly built; a plain-looking panel may hide weeks of thinking about an audit model.
So these pages do not say "I made this"; they explain why a problem was solved the way it was. That is the information a business owner can actually use: someone with a similar problem can recognise their own situation in the account.
Each case ends with a transferable lesson — a conclusion that is not specific to that project and applies to similar work.
For writing that goes deeper into the technical detail, see the technical notes.
Yes. Each case page links to the client's live site and those links are public. The features described in the cases are features running in those systems.
Duration follows scope. A marketing site typically takes a few weeks; a system involving payments or POS takes a few months. The decisive factor is usually not development time but external dependencies: bank virtual POS approval, provider integration credentials and content readiness. When those are waited on, the timeline stretches.
In most cases working on the existing system is the better call. Several of these cases were built on top of an existing WordPress or WooCommerce installation. A rebuild is only advisable when the current structure is genuinely unsustainable.
Custom code written for you is delivered to you. Open-source components such as WordPress and WooCommerce come with their own licences. If a third-party commercial plugin or service is needed, that is stated up front and the licence is purchased in the business's name.