Shopify Optimization
Entrust your Shopify store to web performance experts
Do you want to take full advantage of one of the most advanced SaaS e-commerce solutions and perform better in Google and with your users?
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Don't let a poorly designed Shopify theme permanently impact your conversion rates!
Our web performance experts optimize your Shopify store to meet the highest standards
Send a strong signal to Google and your visitors: focus on Core Web Vitals
A high-performing store guarantees a smooth browsing experience for your visitors, thus maximizing your chances of converting them into buyers. The statistics are clear: internet users quickly abandon a page that takes too long to load. If your site does not meet their expectations, they will turn to the competition. By entrusting us with the technical optimization of your Shopify store, you eliminate the technical barriers that slow down your page rendering.
Pages for collections and products that load instantly are also a decisive advantage for your positioning in Google search results. Initial response times, measured by the TTFB metric, directly influence how indexing bots will utilize the crawl budget allocated to you. The more responsive your Shopify infrastructure, the better the indexing of your catalog will be... and therefore your visibility in the SERPs.
A service in 4 key steps
Our Shopify optimizations are broken down into several key stages.
Technical Alignment
01To make the most of our intervention, we need to understand in detail the architecture and specificities of your Shopify installation. This first video conference session allows us to grasp the history of your store, your theme customizations, integrated third-party applications, identified speed issues, and your web performance ambitions.
Tracking implementation
02We place a tag on your site that collects performance data from your real users. This "RUM" data is used to precisely identify bottlenecks. Thanks to this data-driven approach, we operate with maximum visibility on your issues.
We deploy Lighthouse monitors on your key pages to provide you with a synthetic view of performance evolution. Launched every 8 hours, they allow us to quantify mobile and desktop gains. Practical for those who track Core Web Vitals metrics in a tool like PageSpeed Insights.
Shopify Optimization
03Following an exhaustive technical analysis of your Shopify store, we apply performance corrections directly within your duplicated theme in preview. This intervention phase, carried out over 3 days, constitutes the core of our service: we optimize the Liquid code, CSS, JavaScript, webfonts, images, as well as third-party application integrations to sustainably improve Core Web Vitals. At the watchmaker Herbelin, the mobile homepage thus lost 57% of its weight and 70% of its requests, without changing themes (see the case study).
Intervention Report
04We organize a presentation session via video conference to show you the results of our intervention. The summary document is presented to you with, for each optimization deployed, precise technical explanations and a status report of the impacts measured on performance indicators (LCP, CLS, or even INP). This privileged exchange allows us to answer your questions and transmit best practices that will ensure the long-term performance of your Shopify store.
They entrusted us with their Shopify optimization
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Consult the FAQ for more details on the service.
Our web performance experts have the necessary technical skills to intervene directly on the most customized Shopify themes, safely. This approach proves particularly relevant if you do not have experienced front-end teams internally.
If you already benefit from in-house technical resources or a Shopify partner familiar with your project, an audit is an interesting alternative to turnkey optimization: rather than implementing the fixes ourselves, we provide your teams with a detailed operational action plan. We can also provide post-deployment support through technical acceptance testing, included in the audit service.
Shopify optimization costs between €2,500 and €3,500 excluding tax, depending on the theme in place, the number of installed applications, and the size of the catalog. This service is structured as a package including the initial technical alignment session, the technical intervention phase (3 full days), and the production and presentation of a detailed, illustrated report via videoconference.
To obtain a price proposal, we invite you to contact our account manager Marylise by email or phone. She will quickly send you a personalized quote corresponding to your specific needs.
Shopify hosts your store itself: the server infrastructure and CDN are managed by the platform and offer excellent response times (TTFB), with no room for maneuver on our part.
The bulk of the optimization potential therefore lies on the front-end side: Liquid code, JavaScript, CSS, and third-party applications, often responsible for the majority of page weight. This is precisely where your Core Web Vitals are determined.
What remains out of reach deserves to be named directly, as no provider can bypass it. TTFB, server configuration, and CDN belong to Shopify: no server cache to adjust, no PHP version to choose, no database to optimize. The checkout.liquid file is no longer modifiable, and the checkout process therefore escapes any intervention outside the Plus plan.
Added to this are three structural constraints. Scripts injected by the platform cannot be removed: checkout preloading and the Web Pixels Manager are imposed on all stores, and those that content_for_header inserts into the <head> (application script tags, statistics, Shop Pay) can only be differentiated with a loader designed for them; third-party applications load their resources on all pages, even where they are not needed; and images are transmitted via Shopify's CDN, whose compression settings can only be adjusted through the options exposed by the platform.
What remains actionable is substantial, however, and sufficient in almost all cases. On the Online Store 2.0 themes, the section and block architecture allows code to be loaded as close as possible to its usage: JavaScript and CSS are broken down by section rather than being served in a single bundle for the entire store.
The first task always remains the same: inventorying applications. A store that accumulates a dozen often serves several hundred kilobytes of third-party JavaScript on each page. Uninstalling an app is not enough: its tags often remain in the theme and continue to load resources after termination.
Next come the classic levers, which apply fully: prioritizing the first screen image, reserved dimensions against layout shifts, deferred loading of lower sections, woff2 fonts with a limited number of weights (a variable font is reduced to only the axes actually used, with a calibrated fallback against text shifts), videos re-encoded at the correct bitrate and served from theme assets, which Shopify does not re-encode, and lightening of Liquid in product loops. These actions are sufficient to pass the Core Web Vitals on the vast majority of stores.
On Shopify, slowness never comes from the server: the infrastructure is managed by the platform and the TTFB is generally excellent. The causes are almost always in the theme and applications: accumulated third-party JavaScript, duplicated libraries, un-dimensioned images, and too many fonts.
Applications are the primary suspect. Each installs its own scripts, often loaded across the entire store when they are only used on one page: customer reviews, chat, collection pop-ups, loyalty programs, recommendations. Ten applications are enough to double the weight of a page, without any single one appearing guilty.
The theme comes next. Commercial themes include features that the store does not use, but which are loaded anyway: sliders, hover effects, galleries, advanced filters. Unused code is paid for on every page view, and it can only be removed by intervening in the Liquid, not from the administration interface. Some native components are costly without being visible: each <shopify-account> in the theme prepares the "Login with Shop" connection for any non-logged-in visitor, in an iframe of about 250 KB.
No. Shopify is not an obstacle to good Core Web Vitals : its infrastructure serves TTFBs that many self-hosted stores never reach. The constraint lies with the front-end, not the platform, and that is precisely the part where intervention is still possible.
The real trade-off lies elsewhere. Shopify exchanges a degree of technical control for managed infrastructure and zero maintenance : you don’t manage the server cache or the database, but you don’t have a server to administer or an update to monitor. For the majority of merchants, the exchange is favorable.
A migration is only justified for needs that the platform does not cover : deep customization of the checkout process outside the Plus plan, very specific business logic, or an exceptional catalog size. Performance alone never justifies a platform change, because gains can be achieved without leaving.