Services

Technical SEO and web performance optimization

Markish Tech audits and fixes the technical issues that make a site slow or keep it out of Google: indexing, canonical tags, sitemaps, hreflang, structured data and Core Web Vitals (LCP, INP and CLS). We measure before and after with Lighthouse and Search Console and document every change. We don't promise rankings: we fix what stops you from competing.

Problems it solves

  • Important pages that don't show up on Google or appear with the wrong title.
  • A slow site on phones, with heavy images or too much JavaScript.
  • Duplicate content, misconfigured canonical tags or mixed languages.
  • A migration or redesign that caused organic traffic to drop.

Who it's for

  • Companies with their own site that don't get inquiries from search engines.
  • Sites in several languages or countries that need correct hreflang.
  • Teams about to redesign or migrate who want to protect their rankings.
  • Digital products whose public site must load fast on mobile connections.

What's included

Technical audit

Prioritized report on indexing, metadata, links, structured data, performance and accessibility, with evidence for every finding.

Indexing and crawling

robots.txt, XML sitemap, canonical tags, redirects, status codes and orphan pages.

Structured data

JSON-LD for Organization, WebSite, Service, BreadcrumbList and whatever types match the real content.

International SEO

Per-language URLs, reciprocal hreflang with x-default, self-referencing canonical tags and translated metadata.

Core Web Vitals

LCP, INP and CLS improvements through responsive images, optimized fonts, less JavaScript and caching.

Continuous measurement

Automated tests that catch SEO and performance regressions before release.

How we implement it

  1. Initial measurement

    Lighthouse on mobile and desktop, review of the delivered HTML and Search Console data if you grant access.

  2. Prioritization

    We rank issues by impact and effort.

  3. Implementation

    We fix the code and document every change.

  4. Verification

    We measure again under the same conditions and compare.

  5. Follow-up

    We review Search Console in the following weeks to confirm indexing.

Technologies

  • Lighthouse
  • Google Search Console
  • Bing Webmaster Tools
  • Schema.org (JSON-LD)
  • Playwright
  • Astro
  • Next.js

When it makes sense

  • You have traffic or valuable content that isn't performing in search.
  • You're about to migrate or redesign and don't want to lose rankings.
  • Your site is slow on mobile and that affects inquiries.

When it doesn't

  • You expect instant ranking results: technical SEO removes barriers, but content and authority take time.
  • The site has no content of its own yet; that needs to be created first.
  • You want to buy links or use techniques that break Google's policies.

Frequently asked questions

What are Core Web Vitals?

Three Google metrics about real loading experience: LCP (how long the main content takes to appear, ideally 2.5 s or less), INP (how quickly the page responds to an interaction, ideally 200 ms or less) and CLS (how much content shifts while loading, ideally 0.1 or less).

How do you modernize a site without losing SEO rankings?

By inventorying URLs with traffic and links, keeping the same URLs or redirecting each one with a 301 to its equivalent, preserving titles and content that work, migrating structured data and verifying in Search Console after launch. The most common mistake is changing every URL without redirects.

Do you guarantee the top spot on Google?

No. Nobody can honestly guarantee that. What we do guarantee is fixing the measurable technical problems that stop your site from competing, and showing you the evidence before and after.

Does a Lighthouse score of 100 guarantee good rankings?

No. Lighthouse measures in a lab and is a useful guide, but Google uses real-user data and many other factors, above all content relevance. A good score removes technical obstacles; it doesn't replace useful content.

Want to know if this service fits your case?

Tell us what you need and we'll reply with an initial proposal and next steps.