Seydullah Kaya

Available for new projects

I build web and mobile products that grow your business.

I'm Seydullah, a computer engineer and freelance software developer based in Kahramanmaraş, Türkiye. From business websites to web and mobile apps, I turn your idea into fast, reliable and maintainable products.

Explore my servicesGet a quote

Technologies I work with: Next.js, React, TypeScript, Tailwind CSS, Python, Django, Node.js, PostgreSQL, Supabase, React Native, Vercel, Git

About

Solid engineering, simple products.

Hi, I'm Seydullah.

I'm a computer engineer based in Kahramanmaraş, building web and mobile products for businesses in Kahramanmaraş and across Türkiye. Before writing any code, I make sure I understand your business and your users, then choose the architecture and technology that fit those needs.

I write readable, type-safe and testable code, and I treat performance and security as requirements from day one. After launch I stay on board, keeping the product growing with maintenance and new features.

Location

Kahramanmaraş · Serving all of Türkiye

· Istanbul

How I work

Remote · Fast turnaround

I usually reply to messages within 24 hours.

Frontend

  • Next.js
  • React
  • TypeScript
  • Tailwind CSS

Backend

  • Python
  • Django
  • Node.js
  • REST API

Data & infrastructure

  • PostgreSQL
  • Supabase
  • Vercel
  • Git

Currently learning

  • React Native
  • Expo
  • Motion

Services

From idea to launch, end to end.

From a single landing page to a full-scale application, I support you at every stage.

Business websites

Modern websites that tell your brand's story, load fast and get found on search engines.

What's included

  • Responsive design
  • SEO foundations
  • Contact form
  • Multilingual setup

Web applications

Scalable, custom web apps such as dashboards, booking and management systems.

What's included

  • Authentication and roles
  • Database and API
  • Third-party integrations
  • Admin panel

Mobile apps

Smooth mobile apps running on both iOS and Android from a single codebase.

What's included

  • iOS and Android (React Native)
  • Push notifications
  • Shared backend with web
  • App Store release support

Maintenance & development

Ongoing support to keep your existing site or app up to date, secure and fast.

What's included

  • Bug fixes
  • New features
  • Performance tuning
  • Security updates

Blog

Notes and writing.

What I learn while building, the technical decisions I make and why.

All posts

Contact

Let's talk about your project.

Tell me briefly what you want to build and I'll get back to you within 24 hours. You can also email me directly or message me on WhatsApp.

Message on WhatsApp