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Technical SEO Optimization for Existing Websites

A strong ranking in search engines doesn’t rely on content and backlinks alone. If your site’s structure is poorly built, metadata incomplete, or images misconfigured, Google and your users may misunderstand your pages.

We step in directly on your existing website, regardless of the technology, to correct, structure, and optimize your code according to current SEO standards.

Why Technical Optimization Matters

A website may look functional on the surface but still be penalized by disorganized structure, missing tags, poorly nested headings, or indexing issues. These problems reduce your visibility, slow down your site, and harm the user experience.

Fixing them improves not only your search engine rankings but also your site’s overall quality and credibility.

What We Do

We work directly on your HTML code, templates, or dynamic pages to:

Properly structure titles (H1, H2, etc.)
Fix title, meta description, alt, canonical tags
Implement social media tags (Open Graph, Twitter Cards…)
Optimize image loading and attribution
Clean and simplify the DOM structure
Create a logical internal linking structure
Add structured data (schema.org) where appropriate
Reduce page weight and improve crawlability

Our Methodology

We start with a detailed technical audit, then prioritize improvements based on SEO impact, technical scope, and your business context.

Every improvement is measured with professional tools such as:

Google Lighthouse
Search Console
Screaming Frog
GTmetrix
Ahrefs or Semrush

This allows you to see the concrete impact of our work before and after.

Sample Interventions

Full HTML tag revision on an existing website
SEO optimization of a front-end interface before launch
Reworking the site structure and heading hierarchy
Fixing indexing issues on an e-commerce site
Applying technical SEO best practices after a partial redesign
Implementing Open Graph tags for improved social media display
Increasing Lighthouse scores for performance and accessibility

Want to Improve Your Site’s Technical SEO?

We provide fast, focused interventions with clear plans, real tools, and measurable results. Reach out for a technical SEO audit or targeted code optimization.

→ Let’s talk about your needs
→ Or contact us at: info@codedev.ch