---
type: "Service"
title: "Custom web development"
description: "When you reach the limits of off-the-shelf platforms, we build your site in code, with full control and high performance."
url: "https://www.roicool.com/en/services/custom-web-development"
lang: "en"
dateModified: "2026-10-21"
expert: "Salih Erdem Şahin"
resource: "https://www.roicool.com/en/services/custom-web-development"
alternates:
  tr: "https://www.roicool.com/hizmetler/ozel-kodlu-web-gelistirme.md"
generated: { by: "process:roicool-cms", at: "2026-10-21T19:11:05.617Z" }
related:
  - { title: "Marveltour", resource: "https://www.roicool.com/en/projects/marveltour.md" }
  - { title: "Serkan Hezar", resource: "https://www.roicool.com/en/projects/serkan-hezar.md" }
  - { title: "Professional web design that empowers your digital presence", resource: "https://www.roicool.com/en/services/web-design-agency.md" }
  - { title: "Corporate web design", resource: "https://www.roicool.com/en/services/corporate-web-design-agency.md" }
  - { title: "Landing page design", resource: "https://www.roicool.com/en/services/landing-page-design.md" }
  - { title: "Web server management and security", resource: "https://www.roicool.com/en/services/server-management-security.md" }
  - { title: "Website maintenance and support", resource: "https://www.roicool.com/en/services/website-maintenance.md" }
---

# Custom web development

Custom web development means building a website as software, with a modern framework, a headless CMS and cloud infrastructure, instead of a ready-made site builder. Roicool builds custom-coded sites with SEO, speed, accessibility and the content team's independence designed in from the start, and hands the source code over to the client.

- Your site needs application logic that off-the-shelf platforms don't cover.
- Performance is critical because of very high traffic or a very large number of pages.
- You need deep integration with your own systems.
- You want full control over the infrastructure and data.

### Requirements and architecture

Features, content model, integrations, traffic and maintenance expectations; technology choice.

### Front end

Server-rendered pages, accessible components, a performance budget.

### Content management

A headless CMS or admin panel; a draft, review and publish workflow, multiple languages.

### SEO and GEO foundations

Clean URLs, metadata, structured data, a sitemap, content present in the HTML.

### Infrastructure

Hosting, continuous integration, monitoring; for ongoing management, [server management and security](https://www.roicool.com/en/services/server-management-security).

1. **Requirements analysis and architecture**
2. **Design and prototype**
3. **Development (in iterations)**
4. **Testing, launch and migration**
5. **Documentation and handover**

- Technical architecture document
- Source code (in your repository)
- The launched site and CMS
- Documentation and maintenance plan

## Websites we built

- [SESTEK](https://www.sestek.com/)
- [Marveltour](https://www.roicool.com/en/projects/marveltour)
- [MEP DMC](https://www.meptur.com.tr/)
- [Serkan Hezar](https://www.roicool.com/en/projects/serkan-hezar)
- [Küçükçekmece Hastanesi](https://www.roicool.com/en/projects/kucukcekmece-hastanesi)
- [Alaka AI](https://alaka.ai/)

## More services in Professional web design that empowers your digital presence

- [Professional web design that empowers your digital presence](https://www.roicool.com/en/services/web-design-agency)
- [Corporate web design](https://www.roicool.com/en/services/corporate-web-design-agency)
- [Landing page design](https://www.roicool.com/en/services/landing-page-design)
- [Web server management and security](https://www.roicool.com/en/services/server-management-security)
- [Website maintenance and support](https://www.roicool.com/en/services/website-maintenance)

## FAQ

### When does a site need custom code?

When you need application logic that off-the-shelf platforms cannot handle, high traffic, custom integrations or full control. For most content-led corporate sites, a platform such as Webflow is faster and more economical.

### Which technologies do you use?

Modern JavaScript frameworks on the front end (e.g. Next.js), a headless CMS or custom admin panel for content, and cloud infrastructure for hosting. We choose by the requirements and by your team's capacity to maintain it.

### Who owns the source code?

Unless the project contract says otherwise, the delivered source code and documentation are yours; the code is kept in your own repository account.

### How will we update content?

Through a headless CMS or an admin panel; letting the marketing team update pages and content without a developer is part of the design.

### Is a custom-coded site a disadvantage for SEO?

Not if it is built right. When server-rendered content, clean URLs, metadata, structured data and speed are designed in from the start, custom-coded sites are strong for SEO.

Breadcrumb: [Home](https://www.roicool.com/en) › [Services](https://www.roicool.com/en/services) › [Professional web design that empowers your digital presence](https://www.roicool.com/en/services/web-design-agency) › Custom web development

Source: https://www.roicool.com/en/services/custom-web-development · Last updated: 2026-10-21