Backend & API Development
I build backends and APIs for new products, and improve integrations and performance in existing systems.
Let’s discuss thisComputer Engineer · Backend, AI & Web
I take new web products from idea to launch, and build backend, API, integration and AI features for existing ones. Let’s clarify what you need and map out a practical next step.
Specialized solutions
I build backends and APIs for new products, and improve integrations and performance in existing systems.
Let’s discuss thisI build RAG-based assistants and hybrid search systems connected to your product catalog and documents.
Let’s discuss thisI build WordPress sites and WooCommerce stores with payment, membership and learning integrations.
Let’s discuss thisI help with technology and architecture decisions for new products, and code reviews and scaling plans for existing systems.
Let’s discuss thisCase studies

I built a marketplace for the EMSİ community end to end, connecting people looking for services with service providers. The platform has recorded 123 users, 41 service providers and 1,504 searches.

I turned 2GurmePati's website into a platform that sells on its own, with courses, memberships and payments built in. Today the founders sell through their own site instead of Shopier.

I built a site for Tayfun Optik, an optician serving customers since 1987, with a product catalog and one-tap stock and price requests over WhatsApp. Customers looking for eyeglass repair now find the store through Google.
Client feedback
I’m very glad to work with Çağatay on 2GurmePati’s digital processes. Beyond his technical expertise, the care he takes to understand our brand’s needs and the way he turns our ideas into workable solutions are, for me, among the most valuable parts of this collaboration. As someone who isn’t a software expert, I really value how clearly he explains technical topics, how carefully he answers my questions and how open he stays to communication throughout the process. Evaluating the user experience and our day-to-day business needs together makes our decisions easier. Thanks to his solution-oriented approach, his sense of responsibility and his attention to detail, we’ve built a collaboration I can rely on. I thank him for his work and his contributions to our brand, and I wholeheartedly recommend Çağatay to anyone looking for a reliable, attentive developer who does his job with care.
We’ve been working with Çağatay for about a year and we’ve been genuinely happy with him. Besides understanding what we wanted, he also came up with good, creative solutions for things we hadn’t thought of. For example, even though he hadn’t built our website himself, he quickly set up and integrated a payment system and a membership system into our existing site. His ideas on design and user experience made our work easier in many ways, too. Communication with him is easy, fast and solution-oriented. When there’s a problem, instead of saying “it can’t be done”, he looks for how it can be done. He’s genuinely easy to work with and I’m very happy with the result. I definitely recommend him.
The framework
I define the problem, identify technical constraints and clarify the project roadmap.
I design the data models, API contracts and infrastructure approach to build on a solid foundation.
I develop step by step with testable, maintainable code and visible progress.
I move the system safely to production, document it and plan the next steps.
A new product, improvements to an existing system or an e-commerce integration — tell me what you need and let’s define the next step.