PERFORMANCE OPTIMIZATION
Website Performance Optimization Services
Atwix delivers eCommerce website performance optimization services for Adobe Commerce, Magento Open Source, Shopify Plus, Shopware, and BigCommerce. Our engineers specialize in the performance challenges of manufacturers, distributors, and complex B2B operations. We diagnose and fix what slows your store down, so your pages load faster, rank higher, and convert more.
#1 Global Magento Contributor · 2018–2025
Certified Across 5 Commerce Platforms
200+ eCommerce Certifications
Who This Is For
01
Your Store Got Slow as It Grew
Catalog, traffic, and integrations piled up, and load times crept past the point where shoppers wait. We retune for your current size.
02
You’re Failing Core Web Vitals
Search Console is flagging LCP or CLS; rankings are slipping, and the plugin you installed didn’t move the needle. We fix it at the source.
03
Peak Season Is Coming
Black Friday, the site buckled; or you’re not willing to find out this year. We load-test and harden before the traffic hits.
04
Your B2B Catalog and Portal Slow Down Under Buyer Load
Account-level catalog pages, quote generation, and approval workflows slow down under concurrent B2B sessions. We tune for the traffic patterns and data complexity of B2B operations, not just peak retail volume.
Find out what’s slowing your store down.
A performance audit pinpoints every bottleneck and ranks the fixes by impact, so you know exactly what to do next, on any platform.
What We Optimize
eCommerce performance optimization spans the full stack, from front-end rendering to back-end databases, infrastructure, and application architecture. Atwix’s website performance optimization services address every layer that affects how fast your store loads and how well it holds up under traffic.
Core Web Vitals
Your store passes Core Web Vitals on real devices. LCP, INP, and CLS are optimized for production traffic, not just lab tests. Better scores can support search visibility and reduce exits before the page loads.
Frontend & Asset Optimization
Most of a page’s load time is front-end, and it’s where eCommerce site speed is won or lost. Your assets get compressed and deferred, render-blocking resources are eliminated, and third-party scripts that quietly add seconds are trimmed.
Backend & Database
Slow queries, bloated indexes, and inefficient code are where stores actually choke under load. You get root-cause fixes at the code and database level, not surface patches that degrade again at scale.
Caching & Infrastructure
Full-page cache, Varnish, Redis, and CDN configuration get tuned to your stack, so the store stays fast during peak season, not just on a quiet Tuesday.
Fix Prioritization
A structured audit pinpoints every bottleneck and ranks fixes by impact, so your budget goes to the changes that move the needle.
Scalability Engineering
Your store gets load-tested and rearchitected for peak traffic, so it handles the spike instead of going down at the worst possible moment.
Success Stories
See how we’ve helped eCommerce businesses turn slow, underperforming stores into fast, conversion-ready experiences.
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From 10 to 90+ in Record Time
Lighthouse score 10-20 to 90+
No full replatform needed
100% marketing content control
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Luxury eCommerce Performance
40% performance improvement
Custom backorder + live stock logic
Custom-coded Magento Commerce Cloud
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When Search Actually Works
AI-powered search in seconds
Lightning-fast load times
New B2B rewards program launched
A 0.1-second improvement in mobile site speed lifts retail conversions by 8.4% and adds 9.1% more shoppers to the cart.
— Deloitte & Google, “Milliseconds Make Millions”
How Our Website Performance Optimization Services Work
A structured process means you know what happens at each stage, and nothing falls through the cracks.
1. Discovery Call
We start by understanding your platform, traffic patterns, and business goals. This scopes the audit and keeps the work focused on what actually affects your store.
2. Full-Stack Analysis
Your codebase, database, infrastructure, and front-end get examined at the production level, using real traffic data and profiling tools, not PageSpeed Insights reports.
3. Root-Cause Identification
Every issue gets traced to its root cause, not its symptom. Problems are categorized by type: front-end, back-end, infrastructure, third-party, and configuration.
4. Prioritized Recommendations
You receive a detailed report that ranks every fix by conversion impact and implementation effort, so you know what to address first and why.
5. Implementation
Our engineers implement the changes. All work runs in staging and is tested against your live templates and integrations before deployment.
6. Ongoing Monitoring
After implementation, performance is tracked as the store grows. If new bottlenecks emerge, we identify them before they affect rankings or revenue.
Platforms We Optimize
Adobe Gold Partner
Adobe Commerce
Deep, code-level performance work from the #1 global Magento contributor. Indexing, full-page cache, query tuning, and module cleanup.
#1 Contributor 2018–2025
Magento speed optimization with the same engineering depth for self-hosted stores — caching, database, and front-end tuning that scales with catalog and traffic.
Shopify Plus Partner
Shopify Plus
Shopify speed optimization done right — theme, app, and Liquid tuning to cut bloat and pass Core Web Vitals without breaking the storefront
Platinum Partner
Shopware
Performance tuning for Shopware 6 — caching, HTTP cache, and front-end optimization for B2B and B2C stores.
Certified Partner
BigCommerce
Stencil theme and storefront optimization to keep load times low as the catalog and traffic grow.
Speed Is a Competitive Advantage. Keep It.
Slow stores lose rankings, shoppers, and revenue. Atwix’s website performance optimization services give your store the engineering depth to stay fast as you grow, handle peak traffic without outages, and convert more of the visitors you already have. Whether you’re running a high-SKU catalog on Adobe Commerce or a B2B portal where quote latency affects close rates, the audit starts with your actual data.
Frequently Asked Questions
Have questions about our website performance optimization services? The most common ones are answered below. If yours isn’t here, contact us directly.
How is this different from running PageSpeed Insights myself?
A tool tells you the score; it doesn’t explain why the store is slow or how to fix it without breaking anything. We diagnose the root cause at the code and database level, rank fixes by conversion impact, and implement them. You get the outcome, not a list of warnings.
Which platforms do you optimize?
Adobe Commerce and Magento Open Source, Shopify Plus, Shopware, and BigCommerce. The performance fundamentals are shared, but the implementation is platform-specific, and our engineers are certified across all five.
Do you just audit, or do you fix the issues too?
Both. The audit identifies and prioritizes; our engineers implement the changes. You’re not handed a PDF and left to find a developer.
How fast will my site actually get?
It depends on the starting point and platform, but the target is consistently sub-2-second loads on key pages and a passing Core Web Vitals grade on real devices. The audit gives you realistic, store-specific projections before any work starts.
Will optimization break my storefront or custom features?
No. We profile before we change anything, work in staging, and test against your real templates and integrations. Performance gains shouldn’t cost you functionality.
How long does a performance audit take, and what does the deliverable include?
Most audits are completed within 2 to 3 weeks. The deliverable is a detailed report covering root-cause bottlenecks by category, ranked by conversion impact and implementation effort. Each fix includes an estimated timeline, so you can plan the work in phases.
