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Technical SEO
Technical SEO AuditSchema MarkupCore Web VitalsSitemap ArchitecturehreflangCrawl Budget

Services de SEO Technique

Google filtre votre site avant que tout acheteur ne le voie

91K
Pages Indexed
Deluxe Astrology
35→94
Lighthouse Score
SleepDr migration
137K
Listings Indexed
Not Another Sunday
#3
Google Position
Days after publish
What Technical SEO Actually Fixes — And What It Won't

Your page goes live. Google's crawler arrives in seconds, renders your markup, scores your structure, and decides — before any human sees you — whether your content earns an index slot. Technical SEO is the work you do before that judgment. We audit your crawl, fix your redirect chains, ship schema that tells Google what your pages mean, and tune your Core Web Vitals so your mobile scores deserve your rankings. You get sitemaps that scale to 100K+ URLs, hreflang that reciprocates across your locales, and crawl-budget rules that keep Google's bots focused on your revenue pages — not your faceted-filter dead ends. Done right, your content meets the index on its merit. Done wrong, your best pages stay invisible while sloppier competitors take your rankings.

Où les projets échouent

Lighthouse scores below 50 on mobile — Google deprioritizes slow pages Rankings drop as Core Web Vitals become a stronger signal; competitors sitting at 90+ are already taking your positions.
Thousands of pages published but only a fraction indexed Content investment wasted — pages that aren't indexed generate zero organic traffic.
No structured data — missing rich results in SERPs Competitors with FAQ, Product, and Review schema dominate the visual real estate and capture higher CTR.
Redirect chains and broken links piling up with every site update Crawl budget gets burned on error pages; link equity bleeds through 3–4 hop redirect chains.
Multilingual site without proper hreflang causing duplicate content flags Google serves the wrong language version to users; content cannibalizes itself across locales.
Faceted navigation and pagination creating millions of low-value URLs Crawl budget gets exhausted on filter combinations; your high-value pages get pushed back in Google's crawl queue.

Conformité

Technical SEO Audit

A full Screaming Frog crawl covering broken links, redirect chains, duplicate content, missing meta tags, orphan pages, crawl depth, Core Web Vitals, mobile usability, and structured data validation. You get a prioritized fix list — estimated impact and effort for every item found.

Schema Markup Implementation

JSON-LD for every page type: Organization, LocalBusiness, Article, Product, Service, FAQPage, HowTo, BreadcrumbList, and more. Built into Next.js App Router server components and validated with Google Rich Results Test and Schema Markup Validator.

Core Web Vitals Optimization

We target Lighthouse 90+ on mobile. That means Next.js Image optimization, dynamic imports, font subsetting with display:swap, SSR, Vercel edge caching, third-party script deferral, and CSS critical path extraction.

Sitemap Architecture

For sites with 1K to 100K+ pages: a sitemap index with chunked sitemaps at 50K URLs each, dynamically generated from Supabase with ISR regeneration and GSC submission.

hreflang + International SEO

next-intl with hreflang tags in the HTML head and sitemaps. Locale-aware canonical URLs, language-specific structured data, and two-tier translation gating for multilingual sites.

Crawl Budget Optimization

robots.txt refinement, noindex/nofollow strategy, internal linking architecture overhaul, pagination handling, and faceted navigation management — all aimed at steering crawl budget toward your high-value pages.

Ce que nous construisons

See Every Issue, Ranked by Revenue Impact

Every audit item scored by traffic impact and implementation effort. You fix what moves rankings first — not what's loudest in the report.

Make Google Read Your Pages the Way You Wrote Them

JSON-LD for Organization, Product, Article, FAQPage, HowTo, BreadcrumbList, Review, and 6 more — validated in Rich Results Test before a single line ships.

Hit 90+ Mobile or We Don't Ship

Real result: SleepDr went from Lighthouse 35 to 94 during a WordPress-to-Next.js rebuild. Image optimization, dynamic imports, edge caching, font subsetting — every lever pulled.

Ship Sitemaps That Don't Break at Scale

Supabase-powered sitemap index with chunked 50K-URL files, regenerated via ISR. Battle-tested on 91K pages for Deluxe Astrology and 137K for Not Another Sunday.

Translate Once, Reciprocate Everywhere

Production record: 30 languages, 118 hreflang pages, 41 namespaces, 39 locale-aware API routes. Bidirectional and self-referential — no broken returns.

Stop Google's Bots Burning Time on Dead URLs

robots.txt rules, faceted-navigation gating, and internal linking restructure for sites with 25K–137K+ URLs. Crawl stats land in GSC by week six.

Notre processus

01

Crawl & Audit

We run a full Screaming Frog crawl and catalog every broken link, redirect chain, orphan page, missing schema, and Core Web Vitals failure. You get a prioritized spreadsheet with impact and effort scores for each item.
Week 1-2
02

Architecture Plan

We design the fix strategy: schema types per page template, sitemap structure, hreflang matrix, crawl budget rules, and CWV optimization targets. You approve everything before we write a line of code.
Week 2-3
03

Implementation

Schema markup in Next.js server components, sitemap generation from Supabase, hreflang with next-intl, CWV fixes through image optimization, dynamic imports, and edge caching. Every change gets validated against Google's tools before it ships.
Week 3-6
04

Validation & Submission

Rich Results Test on every schema type, Lighthouse audit on key pages, sitemap submission to GSC, hreflang validation, and crawl stats monitoring. Nothing ships until scores hit targets.
Week 6-7
05

Monitoring & Iteration

30-day post-launch monitoring of index coverage, crawl stats, CWV scores, and rich result appearances. The ongoing tier includes monthly re-audits and continuous optimization.
Week 8+
Next.jsSupabaseVercelScreaming FrogGoogle Search Consolenext-intl

Questions fréquentes

Qu'inclut un audit SEO technique ?

Un crawl complet Screaming Frog couvrant les liens cassés, les chaînes de redirections, le contenu dupliqué, les balises meta manquantes, les pages orphelines, l'analyse de la profondeur de crawl, l'évaluation Core Web Vitals, l'utilisabilité mobile et la validation des données structurées. Le livrable est une liste de corrections priorisée avec l'impact estimé sur le trafic et l'effort d'implémentation pour chaque élément trouvé.

Combien de temps prend un audit SEO technique ?

Un engagement d'audit seul prend 1 à 2 semaines selon la taille du site. Pour un site de 10K pages, attendez-vous au crawl et à l'analyse en première semaine et à la liste de corrections priorisée en deuxième semaine. Les sites de plus de 50K pages nécessitent souvent des passes de crawl supplémentaires et peuvent s'approcher de 3 semaines.

Quels types de schema markup implémentez-vous ?

Nous implémentons JSON-LD pour Organization, LocalBusiness, Article, BlogPosting, Product, Service, FAQPage, HowTo, BreadcrumbList, WebSite, Event, Person et Review. Chaque type de schema est construit dans les composants serveur App Router de Next.js et validé avec Google Rich Results Test et Schema Markup Validator avant déploiement.

Pouvez-vous améliorer Core Web Vitals sur un site Next.js existant ?

Oui. Nous avons fait passer des sites de Lighthouse 35 à 94 en utilisant l'optimisation Next.js Image, les imports dynamiques pour les composants lourds, la subsetting de polices avec display:swap, SSR, le caching edge Vercel, la remise à plus tard des scripts tiers et l'extraction du critical path CSS. Nous ciblons 90+ sur mobile pour chaque projet.

Comment gérez-vous les sitemaps pour les sites avec 100K+ pages ?

Nous construisons un index de sitemap avec des sitemaps fragmentés à 50K URLs chacun, générés dynamiquement à partir des requêtes Supabase en utilisant ISR pour la régénération. Nous avons prouvé cela à l'échelle — Deluxe Astrology a 91K pages indexées et Not Another Sunday a 137K annonces indexées en utilisant cette architecture exacte.

Supportez-vous les sites multilingues avec hreflang ?

Oui. Nous implémentons next-intl avec des balises hreflang dans le head HTML et les sitemaps, des URLs canoniques conscientes de la locale, des données structurées spécifiques à la langue et un gatekeeping de traduction à deux niveaux. Notre record en production est Deluxe Astrology : 30 langues, hreflang sur 118 pages, 41 namespaces et 39 routes API conscientes de la locale.

Technical SEO from $2,000
Audit only $2-5K · Audit + implementation $5-15K · Full ongoing $10-25K.
See all packages →
Schema Markup in Next.js: JSON-LD Structured Data GuideDynamic Sitemap for 91,000 Pages with Next.js + Supabasehreflang Tags in Next.js for 30 LanguagesSleepDr: WordPress to Next.js — Lighthouse 35 to 94

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