Technical SEO Services: Audit and Optimization
The foundation of search visibility. Without solid technical SEO, even the best content will not rank. We optimize your site architecture, loading speed, crawlability and indexation to ensure search engines can find, understand and rank every page. Our technical audits have uncovered issues costing clients thousands in lost traffic, from misconfigured robots.txt blocking entire sections to canonical tag loops creating duplicate content penalties. We fix what others miss.
What we do
How we work
Site Speed & Core Web Vitals
Google uses Core Web Vitals as a direct ranking factor. We optimize LCP (Largest Contentful Paint) under 2.5s through image optimization, CDN configuration, server response time improvements and critical CSS inlining. INP (Interaction to Next Paint) under 200ms by eliminating long JavaScript tasks and optimizing event handlers. CLS (Cumulative Layout Shift) under 0.1 by reserving space for dynamic content, setting image dimensions and preloading fonts. We implement Brotli compression, browser caching with optimal TTLs, and resource hints (preconnect, prefetch, preload).
Crawlability & Indexation
We ensure search engines can efficiently discover and index your content. XML sitemaps with priority and lastmod signals, submitted to Google Search Console and Bing Webmaster Tools. Robots.txt configuration that allows crawling of valuable pages while blocking admin areas, duplicate content and resource-heavy files. Canonical tags preventing duplicate content from filters, sorting, pagination and URL parameters. Internal linking architecture that distributes PageRank effectively and ensures every important page is reachable within 3 clicks from the homepage.
Structured Data & Rich Results
Schema.org markup implementation that earns rich snippets in search results, increasing click-through rates by up to 30%. We implement Organization, LocalBusiness, Product, FAQ, HowTo, Article, BreadcrumbList, and Review schemas. JSON-LD format (Google's recommended method) injected correctly in the page head. Validation with Google Rich Results Test and Schema Markup Validator. Monitoring for rich result appearances and click-through rate improvements in Search Console.
Technical Audit & Monitoring
A technical SEO audit starts with a full technical analysis: a professional crawl combined with real Google Search Console data, surfacing crawl errors, orphan pages, canonicalization and hreflang problems, and architecture issues. You get a report listing every problem found, ordered by impact on traffic rather than by how dramatic it looks. After the fixes we do not disappear: we monitor indexing and vitals monthly, so regressions are caught before they cost rankings.
Migrations and redesigns without traffic loss
The most common SEO disaster is launching a new site without a redirect plan: rankings built over years vanish in days. We prepare migrations properly: an inventory of pages with traffic, one-to-one 301 mapping from old to new URLs, post-launch verification in Search Console and week-by-week recovery tracking.
Site architecture and internal linking
Internal structure decides which pages Google considers important. We build clear hierarchies where service pages receive the right signals: internal links with relevant anchors, breadcrumbs, shallow click depth and no orphan pages.
JavaScript SEO & rendering
More and more sites are JavaScript applications, and Google sees them differently than visitors do: what does not render does not exist in search. We check how your pages look to Googlebot using URL Inspection and rendering tests, then apply the right fix: prerendering, server-side rendering or correct hydration for React, Vue or Next.js. We confirm that titles, content and links are present in the indexed HTML, not only in the user's browser.
Images, fonts & media
Images are usually the heaviest part of a page and the first place where speed is lost. We convert to modern WebP or AVIF formats, generate multiple sizes with srcset, enable lazy-loading where it does not hurt the experience and reserve the right space so the layout never jumps. Fonts get preload and the right font-display so text shows instantly. The result is directly visible in LCP and in your mobile speed score.
Server hygiene: HTTPS, redirects & errors
A healthy site responds cleanly: HTTPS everywhere, a single canonical domain version, direct 301 redirects with no chains or loops. We clean up 404 errors that receive links or traffic, handle soft 404s and expired pages correctly and verify status codes for every page type. Less wasted crawl budget means faster indexing for the pages that bring you clients.
Hreflang & multilingual sites
If your site has versions in multiple languages, Google needs to know exactly which page to show to whom. We implement complete hreflang pairs with reciprocal return tags and x-default, align canonicals with language versions and avoid the classic traps: partially translated pages, versions cannibalizing each other or automatic IP-based redirects that block crawlers.
Crawl budget for large sites
On an online store or a portal with thousands of pages, the problem is not whether Google can access the site, but what it chooses to access. Faceted filters, URL parameters, pagination and product variants can generate tens of thousands of near-identical addresses that burn crawl budget. We analyze server logs and crawl reports, close the black holes and steer the bot toward the pages that produce sales.
What we will not sell you
We do not sell first-position guarantees, algorithm tricks or reports inflated with meaningless metrics. Correct technical SEO means documented repairs, each with its proof in Search Console: before and after. If an issue is not worth fixing because its impact is small, we say so directly and your budget goes where it matters. That is what a collaboration that outlasts three months looks like.
Deliverables
What you get
Frequently asked questions
What clients ask us
What is technical SEO?
Technical SEO is the part of optimization that deals with your site's infrastructure: indexing, speed, structure, structured data and rendering. It does not touch your page copy; it creates the conditions that let pages rank: if Google cannot access, understand and render your site quickly, every other SEO effort has nothing to stand on.
How do I know if my site has technical SEO problems?
Typical signs: pages that never show up in Google despite existing for months, traffic dropping without explanation, error messages in Search Console, red mobile speed scores. A technical audit gives you an exact diagnosis: a list of issues with proof for each one and its estimated impact.
How fast will I see results?
Technical fixes are usually applied within two to four weeks, and the effect shows as Google recrawls the site: from a few days for indexing issues to two or three months for speed and structure improvements. We measure everything in Search Console, on real data.
What tools do you use?
Professional crawlers for full site analysis, Google Search Console and Chrome UX Report data for real field conditions, PageSpeed Insights for speed and our own tooling for continuous monitoring. Tools matter less than interpretation: we deliver conclusions and fixes, not raw exports.
Do I need technical SEO if my site is new?
Yes, it is actually the ideal moment. A technically correct launch starts with clean indexing, good speed and a healthy structure, at a much lower cost than fixing things later. Many serious issues, missing redirects or pages blocked from indexing, appear exactly at launch or redesign.
What is the difference between technical SEO and on-page SEO?
On-page SEO optimizes the visible content: titles, copy, how information is structured in the page. Technical SEO optimizes the machinery behind it: how the page is discovered, rendered and delivered. They complement each other, and at DCL we handle them together when the audit shows issues on both fronts.
Next step
Tell us about your site
Send us your site address and what bothers you: traffic, positions, speed. You get an honest evaluation and a fixed quote within 48 hours, with no obligation.
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Request an SEO quote
30-min brief, no obligation. Fixed quote in 48h.
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