Technical SEO services

Fix what search can’t see

Your best page can’t rank if Google can’t reach it. It can’t be quoted if ChatGPT can’t read it. Most technical problems are silent. The traffic just never shows up, and nobody sends you an error message.

My technical SEO services find what’s blocking your key pages, fix it in order of what it costs you, and check that the fix held. You work with me directly, from the first crawl to the monthly report.

Cutaway painting of a château: courtiers take tea in a sunlit salon while, beneath the floor, an engineer fixes a leaking brass pipe by lantern light

Where sites stand now

48%of mobile websites passed all three Core Web Vitals in 2025HTTP Archive Web Almanac, 2026

62%of mobile websites load their main content fast enough to rate “good”. It’s the check most sites failHTTP Archive Web Almanac, 2026

63%of pages cited in Google’s AI Overviews also rank in Google’s top 100 for the same searchAhrefs, 863,000 searches, 2026

The problems that cost you most don’t look like problems

A broken checkout gets fixed by lunch. A service page that Google quietly dropped from its index can sit there for a year.

The site looks fine to you, your team and your customers. It just doesn’t look fine to the software that decides who gets found.

The numberWhat it meansSource
48%of mobile websites pass all three Core Web Vitals, Google’s page experience checks. Loading speed is where most of them failHTTP Archive Web Almanac, 2026
62%of mobile websites show their main content in under 2.5 seconds. More than a third are still slow at the moment a buyer decides to stay or leaveHTTP Archive Web Almanac, 2026
63%of pages cited in AI Overviews rank in Google’s top 100 for the same search. A page Google can’t index rarely makes it into Google’s AI answersAhrefs, 863,000 searches, 2026
8%of Google visits with an AI summary led to a click on a result, against 15% without onePew Research Center, 2025

Fewer clicks are on offer, and the pages that win them have to be reachable, fast and clear to machines as well as people. Technical SEO makes sure your best pages are in the running at all.

There’s a newer wrinkle too. Several AI crawlers don’t run JavaScript. If your pricing, product details or service copy loads through scripts, those crawlers see a nearly empty page.

Google may still rank it. ChatGPT may never read it.

Fixes that pay on pages you already have

Technical work is often the fastest return in SEO, because it improves pages that already exist. It doesn’t need new content or years of authority. When a commercial page gets back into the index, or stops competing with its own duplicate, the gains can show within weeks of Google recrawling it.

It also compounds. Every page you publish after the fix lands on a site that’s easier to crawl, faster to load and clearer to understand.

Good plumbing is boring. Burst pipes are not.

Why most technical SEO work never reaches revenue

  • The audit counts warnings, not money. A tool flags 4,000 issues and 3,900 of them don’t matter. The ones that do get buried on page 60.
  • Every fix gets the same priority. A missing alt tag on a 2019 blog post sits next to a noindex tag on your main service page.
  • The fix list never reaches the developer. Or it arrives as “improve site speed”, which is a wish, not a ticket.
  • Nobody checks after launch. A release, a plugin update or a redesign quietly undoes last quarter’s work.
  • AI crawlers get left out. Robots.txt and firewall rules written with only Google in mind can shut out the assistants your buyers now use.

Five doors between your page and a buyer

Before a page can earn a lead, it has to get through five doors. Can search engines find it? Will they keep it? Can they read it? Do they understand it? Does it load before the buyer loses patience?

  1. Find the stuck doors
  2. Can search engines find it and keep it?
  3. Can they read it and understand it?
  4. Does it load before they leave?
  5. Keep it fixed

I check every door on the pages that matter most, then open the stuck ones in order of what they cost you. A focused site with a few blockers can be clear in a month. A large catalog or a JavaScript-heavy build takes longer.

Weeks 1 to 2

1. Find the stuck doors

I crawl the site the way Google does, then compare that with what Google actually reports in Search Console. The gap between the two is where the trouble hides.

Server logs, if you have them, show what bots really do, not what we hope they do.

On my desk

  • Full site crawl
  • Search Console indexing and crawl stats review
  • Log file analysis, where logs are available
  • JavaScript rendering checks, with and without scripts
  • Core Web Vitals review from real-user data
  • Template-by-template review, not page-by-page

On your desk

  • A short list of the problems that cost you traffic or leads, ranked by value
  • What each fix involves, and who needs to do it
  • A clear “ignore this” list, so nobody burns a sprint on warnings that don’t matter
Weeks 2 to 6

2. Can search engines find it and keep it?

Crawling and indexing come first, because nothing downstream works without them.

I clear the path to your commercial pages and stop Google from wasting its time on filter URLs, old parameters and pages nobody needs.

On my desk

  • Robots.txt and meta robots rules
  • XML sitemaps
  • Canonical tags and duplicate pages
  • Redirect chains, loops and broken links
  • Faceted navigation and URL parameters
  • Crawl budget on large sites
  • Access for AI crawlers (GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot) and Bing indexing

On your desk

  • Key pages crawled and indexed, confirmed in Search Console
  • One clean URL for each page
  • Bots spending their time on the pages that sell
Weeks 2 to 8

3. Can they read it and understand it?

A page can be indexed and still be misunderstood.

I make sure the important content sits in the HTML, the site structure tells Google which pages matter most, and schema markup describes what you sell.

On my desk

  • Server-side or pre-rendered content for key templates
  • Site architecture and internal linking
  • Schema markup (Organization, Service, Product, FAQ, Breadcrumb)
  • Hreflang for bilingual and international sites
  • Mobile rendering

On your desk

  • Content that Google and AI crawlers can read without running scripts
  • A structure where your money pages get the most internal links
  • Schema that validates and matches the page
Weeks 3 to 10

4. Does it load before they leave?

Speed work gets oversold. A perfect PageSpeed score is a nice screenshot and a poor business goal.

I focus on the templates that carry revenue, and on the check most sites fail: how fast the main content appears on a phone.

On my desk

  • Core Web Vitals (LCP, INP, CLS) by template
  • Image, font and script loading
  • Third-party script review (yes, including the chat widget you forgot you installed)
  • Caching and hosting checks

On your desk

  • Faster key templates, measured on real users, not only in lab tests
  • Developer tickets with the exact change, the reason and the expected gain
Ongoing

5. Keep it fixed

Sites change every week. New plugins, new pages, new developers with strong opinions about redirects. I watch for regressions and check big changes before they go live, so a redesign doesn’t undo a year of work.

Simple fixes I can often make in your CMS myself. Complex ones need a developer, and how much depends on your CMS. For those, I write the ticket and check the result.

On my desk

  • Monthly technical monitoring
  • Pre-launch checks on releases and redesigns
  • Migration planning and redirect mapping when you change platform or domain
  • Index coverage and Core Web Vitals tracking

On your desk

  • An early warning when something breaks, before it shows up in revenue
  • A redirect map and launch checklist for any migration
Oil painting of a red balloon rising over a château and its formal gardens

How you’ll know it’s working

Every month you get one short report that starts with the pages that make you money.

  • Indexed pages

    Indexed commercial pages in Search Console, before and after.

  • Real-user speed

    Core Web Vitals from real users, by template.

  • Leads and sales

    Clicks, leads and sales from the pages I fixed, tracked in GA4 by landing page.

  • AI crawler visits

    AI crawler visits in your server logs, where logs are available.

  • What changed

    What I fixed, what moved, and what’s next.

If AI visibility matters in your market, I track it as its own scoreboard through my AI search optimization services.

A fix only counts if it reaches a page that sells

Technical SEO has a scoring problem. Tools grade your site out of 100, and it’s tempting to chase the grade. But a site can score 98 and still hide its best service page from Google. Another can score 71 and sell just fine.

So I rank every fix on three things. High reach, high value and low effort go first.

Everything else waits its turn, including the warnings that turn the dashboard red.

How I rank a fix

  • ReachHow many important pages does it touch?
  • ValueAre those pages close to a lead or a sale?
  • EffortCan it ship this month, or does it need a rebuild?

Results worth putting a name beside

Different markets, same standard. SEO should make you money, and these did.

Oil study of terracotta and gold clouds against a deep blue sky
Longevity and diagnostics

Jinfiniti Precision Medicine

356 to 9,365 first-page keywords

A founder’s peer-reviewed research, made legible to Google. Monthly organic sessions rose from 5,600 to 78,000.

Read the case study
Biotech and research supply

Confidential client

$0 to $8.48M in organic revenue

A new domain in a restricted category. Month for month, year two earned seven times year one.

Read the case study
Health and wellness

Jay Campbell

3.3x organic traffic

A bestselling author’s site, rebuilt around what he knows best. Ranking keywords grew fivefold.

Read the case study
Oil painting of a gold balloon drifting over a distant château at golden hour

A grand name for a very direct working relationship

Chateau Mojo is my SEO and AI search consultancy. I’m Jeremy McWilliams.

I’ve spent 12 years in SEO, including time at an award-winning Montreal agency. My work covers ecommerce, health and wellness, biotech, B2B, and other markets where buyers research hard before they commit.

Most AI SEO companies hand you to an account manager after the sales call. Here, the person on the call is the person doing the work.

More about me

This works best when

  • Your site runs on templates, a product catalog or a JavaScript framework, or has more than a handful of pages.
  • Traffic dropped after a redesign, a migration or a platform change.
  • Your content is good, but your commercial pages still don’t rank.
  • You have a developer for the complex fixes, so they actually ship.

It’s a poor fit if

  • You have a small site that’s already indexed and fast.
  • You want a perfect PageSpeed score for its own sake.
  • Nobody can make changes to the site.

If technical problems aren’t what’s holding you back, I’ll say so on the call and point you to what is.

Take a tour

Questions about technical SEO

What is technical SEO?

Technical SEO is the work that makes sure search engines and AI crawlers can find, read, understand and load your pages. It covers crawling, indexing, rendering, site structure, schema, speed and redirects. It doesn’t write your content. It makes sure your content gets a fair hearing.

What’s the difference between SEO and technical SEO?

Technical SEO is one part of SEO. SEO as a whole also covers keyword strategy, content and authority, and technical SEO is the foundation under all of it. Think of it as the wiring. Nobody visits a house for the wiring, but everyone notices when the lights don’t work.

What do technical SEO services include?

With me, they include a crawl and indexing review, fixes ranked by value, JavaScript rendering checks, site architecture and internal links, schema markup, Core Web Vitals, AI crawler access, migration support and monthly monitoring. Simple fixes I can often make myself. Complex ones go to your developer as a clear ticket, and I check the result.

How much do technical SEO services cost?

It depends on the size of the site and the work involved. Technical SEO is usually part of a wider SEO engagement, because fixes pay off most when they support a plan for the pages that sell. I can also audit and consult on technical issues on their own when that’s what you need. Either way, you get the scope and the fee in writing before you commit.

Can I hire you for a technical audit only?

Yes. If you need a technical audit and advice without an ongoing engagement, I can do that. You get the problems ranked by value and clear tickets your team can act on. For a full review of what’s holding your search back, start with my SEO audit.

How long does technical SEO take to show results?

Fixes to crawling and indexing can show within weeks of Google recrawling the pages. Speed and structure changes usually take longer to show in rankings. Before we start, I’ll tell you which fixes I expect to move first.

Is SEO dead now with AI?

No. AI answers lean on pages that search engines can already crawl and trust, and nearly two in three pages cited in AI Overviews rank in Google’s top 100 for the same search. Technical SEO now does two jobs: it keeps you in Google, and it keeps AI crawlers able to read you.

Can ChatGPT do SEO?

It can help, but it can’t do the job alone. ChatGPT can explain a canonical tag or draft a redirect rule. It can’t crawl your site, read your server logs or tell which of 4,000 warnings is costing you money. I use AI tools for data work and repetitive checks. The diagnosis and the decisions are mine.

Are you a technical SEO consultant or an agency?

I’m an independent technical SEO consultant. Chateau Mojo is my own consultancy, so the person who runs the crawl is the person who explains it to you. Plenty of technical SEO agencies and companies do good work with bigger teams. The question to ask any of them is who will actually touch your site.

Do you handle site migrations?

Yes. A migration is where technical SEO pays for itself fastest, mostly by preventing disasters. I map every redirect, check the new site before launch and watch the index closely after. The best migration is the one nobody notices.

Do you do technical SEO for ecommerce sites?

Yes. Ecommerce sites have their own traps: filter pages, out-of-stock products, duplicate variants and heavy templates. I fix those at the template level, so one fix covers thousands of pages at once.

Do you offer website speed optimization services?

Yes, as part of technical SEO. I focus on the templates that carry revenue and on real-user data, then write developer tickets with the exact change. If your site needs a rebuild rather than a tune-up, I’ll tell you.

Do I need a developer?

For complex fixes, usually yes. How much developer time you need depends on your CMS. Simple changes, like titles, redirects or schema in many CMSs, I can often make myself. For the rest, I write clear tickets and check the result.

Painted rococo ceiling of clouds and blue sky with a gilded cornice

Find out what’s blocking you

Bring me your site and the pages that matter most to your revenue. You’ll leave the call knowing whether technical problems are holding you back, which ones, and whether I’m the right person to fix them.

If your site is in good shape, I’ll tell you that too.