4.9
Performance optimization services for eCommerce stores
We treat a slow store as an engineering problem: performance optimization in code and infrastructure across the whole stack, with results verified on real-user data.
A scan you can act on with any team, including your own.
Trusted by 700+ leading brands worldwide
Trusted by 700+ leading brands worldwide
Performance optimization at eCommerce scale
600+
performance optimization projects
$4B+
processed for our clients per year
45
countries in our workforce
.jpg)
.svg)
What performance optimization services include
Performance optimization services for an eCommerce store cover every layer that costs loading time, on Magento, Shopify, BigCommerce, or a custom build. The work lands in your code and your infrastructure, and every result is confirmed in Core Web Vitals field data, the numbers Google records from real shoppers.
Frontend rendering and Core Web Vitals
Heavy scripts come off the render path, and images and fonts are compressed and deferred: the frontend work that improves Core Web Vitals most.
Server response and TTFB
Application code and slow database queries tuned at the source, so every template starts its render from a fast first byte on every request.
Third-party script control
Every third-party tag and app script is measured for the milliseconds it costs, then deferred or removed with the script owner's sign-off.
Infrastructure, CDN, and caching
Varnish, Redis, CDN configuration, and database indexing set up so the platform serves pages at the full speed it is capable of.
Peak-load readiness
Load behavior tested at peak traffic levels, with auto-scaling infrastructure on AWS prepared well before your biggest selling days.
Performance budgets and monitoring
Agreed limits on page weight and timings that every future release is checked against, so the gains are still there a year later.
The real cost of a slow eCommerce store
A slow store rarely fails in a way anyone reports. Orders keep coming in and no alert fires. Web performance optimization gets scoped only after conversion falls and ad costs rise.
Infrastructure spend covers for slow code
When code is slow, the quick fix is a bigger server. Hosting bills climb every year, and the engineering to improve website performance never gets budgeted.
Peak days expose the heaviest pages
Campaign spikes and sale events push traffic onto the slowest templates. A store that holds up in a quiet week slows down exactly when the most revenue is at stake.
Each release adds a little more weight
New features and tags ship all year, and each one costs milliseconds. Speed regresses between projects because nobody is assigned to notice.
How the performance work runs
Website performance optimization runs in five stages in a fixed order: no phase starts before you approve its scope, and the store takes orders the whole way through. A focused frontend phase finishes in weeks, and a full-stack scope across server and checkout runs longer.
Audit and benchmarking
Every page type gets profiled: LCP, INP, and CLS, the three Core Web Vitals, plus server response timing. The output is a map of where the time goes, ordered by revenue impact.
Fix plan, priced per phase
The findings turn into a plan of phases, each priced on its own and tied to the movement it is predicted to deliver in your numbers.
Execution sprints
Engineers work through the phases in order: frontend rendering first when it holds the biggest share of the loss, then media delivery and server-side tuning.
Checkout acceleration
Payment and shipping scripts, Klarna and PayPal included, move to deferred loading, and redundant cart calls get removed. Checkout is measured on its own, because a slow page at payment costs the most revenue.
Zero-downtime rollout
Rollout happens in small, reversible steps. Once live, monitoring watches the numbers, and the team intervenes the moment a release slows something down.
.png)
Every major eCommerce platform, covered
The same failing metric has different causes on Magento than on a headless build. eCommerce performance optimization is platform work at the code level, and the fix belongs to engineers who work in that stack every day.
Magento and Adobe Commerce
The most certified Adobe Commerce team in the world, with 894+ Adobe certifications. Start with Magento performance optimization.
Tracking rebuild & analytics setup
Official Shopify Plus Partner, with Shopify store projects delivered since 2016. Continue to Shopify speed optimization.
Data warehouse & unification
A certified BigCommerce partner, with performance work scoped to what the platform allows. See BigCommerce page speed optimization.
Dashboards & ongoing insights
Headless storefronts and custom builds go through the same profiling discipline, measured on the numbers your own traffic generates.
Results measured on production stores
All three run Magento (Adobe Commerce), the stack where scandiweb speed optimization services have the deepest published record.
.png)
.svg)
Category page response times cut 78.25% for a specialty sports retailer
1.3 s
largest contentful paint (LCP)
0.04
cumulative layout shift (CLS)
34%
lower average page rendering time
Learn more
.png)
Every published speed metric improved for a 22,000+ SKU football shirt catalog
2.5x
page speed performance score
350%
First Input Delay improvement
45%
Interaction to Next Paint gain
Learn more
.png)
A chocolate retailer gained 52.9% more users after its storefront rebuild
99
desktop PLP PageSpeed score
1.8 s
homepage LCP on desktop
+25.5%
average engagement time
Learn more
Who this is for, and who it is not for
Stores that already have traffic and lose revenue to slow pages get the most from website speed optimization services, whatever the platform. When you are unsure, run the free scan anyway: it names the actual bottleneck, and if speed is not the problem, we say so.
Relevant if
Not relevant if
What performance optimization costs
Website performance optimization services are priced by what the work covers. Four factors set the price: your platform, the condition of the code, third-party script weight, and the template count. The free performance scan shows where the time goes; the full audit then turns that into a phased plan, and you commission the phases in order of likely return.
For Magento stores, the audit also exists standalone as a Magento performance audit.
See what is slowing your store down, and what fixing it is worth
A free performance scan identifies the layer at fault and the revenue it is holding back.
How clients describe the work
.webp)
.png)
Frequently asked questions about performance optimization
What is performance optimization for an eCommerce store?
Performance optimization is engineering work that makes a store load and respond faster for the shoppers actually using it. For an eCommerce store the goal is measurable: pass Google's Core Web Vitals and convert more of the traffic you already pay for. scandiweb has completed 600+ projects of exactly this kind.
Do gains come from the frontend or the backend?
The split differs by store. Frontend rendering decides most of what Core Web Vitals measure, so page speed optimization services concentrate there. A typical Magento frontend loads 200+ files, and the Hyvä frontends scandiweb builds load 2. Backend and infrastructure set the response time every page starts from. The audit shows where your store loses the most time.
How much does it cost to optimize a website?
It depends on what the audit finds. One-off cleanups sit at the cheap end of the market, and they rarely move a store's field numbers. scandiweb prices the work from the diagnosis: the audit names the causes, and you see the cost of every fix before committing to any of it.
Will the speed gains last, or will the site regress?
They last if the work ends with monitoring, which is why step five exists. scandiweb confirms every fix against field data, then keeps 24/7 health checks and performance alerts running long after handoff. An engineered baseline plus monitoring is what makes speed durable.
What is the difference between lab data and field data?
Lab data comes from a simulated test, like a Lighthouse or PageSpeed run. Field data is what your visitors record, collected by Chrome and reported against Core Web Vitals thresholds. A store can score well in the lab and still fail real users, which is why a Core Web Vitals optimization service is judged on field data, the standard scandiweb signs results off against.
Which eCommerce platforms do you optimize?
Magento and Adobe Commerce, Shopify and Shopify Plus, BigCommerce, and headless or custom stacks. scandiweb has 20+ years of platform experience and is a recognized contributor and partner of Hyvä, Magento, and ReadyMage. Magento, Shopify, and BigCommerce each have a dedicated scandiweb performance page, so you can go one level deeper on yours.
Do rankings and AI answers depend on page speed?
To a measurable degree, yes. Core Web Vitals feed Google's page experience signals, and a faster server lets Googlebot crawl more of your catalog. AI assistants also favor pages they can fetch and parse quickly when they choose citations. Core Web Vitals optimization is the shared technical base, and eCommerce SEO services carry the rest of the work.
Get your free performance scan
The performance scan starts from one link: your store URL. What comes back is a diagnosis and a phased performance optimization plan, whatever platform you run.
Prefer to talk now? Book a call straight away, or email us at: [email protected]
