The real problem hiding in your store
Most Shopify stores carry years of hidden scripts, unused app code, and performance blockers.
Ghost Scripts
Uninstalled apps leave behind JavaScript that still runs on every page load, silently slowing your store.
Render-Blocking Code
Poorly loaded CSS and JS files block your page from rendering, making visitors wait for content they can't see.
Bloated Theme Code
Years of customizations, unused features, and legacy code pile up — your theme carries weight it doesn't need.
Unoptimized Assets
Oversized images, uncompressed files, and missing lazy loading add seconds to every page view.
Third-Party Overload
Too many tracking pixels, chat widgets, and external scripts compete for bandwidth and block page rendering.
Missing Performance Basics
No preloading, no code splitting, no caching strategy — the fundamentals that fast stores get right from day one.
One day. Measurable results.
Our engineers clean, optimize, and fix your store in one day.
Deep Performance Audit
We scan every line of code, every script, every asset. You get a complete report of what's slowing you down and exactly what we'll fix.
Surgical Code Cleanup
We remove ghost scripts, eliminate render-blocking resources, compress assets, and restructure your theme for speed — without breaking anything.
Live Deployment & Verification
Changes are tested on staging, deployed to production, and verified with before/after metrics. You see the difference immediately.
Questions & Answers
How is Zinzo different from other (plugin) solutions?
We take a custom development approach and don't rely on '3rd party plugin solutions' or quick-fixes. By addressing the core issues, back-to-front we can give long lasting performance guarantees and support to keep conversion results high!
Why should I not ask my development partner to address this?
You can and you should. However, it will take a lot more time and more than double the costs as performance optimisation is our niche expertise, not theirs. Even better: we'll be working closely together with them to get the job done.
What's your guarantee policy?
Our performance sprint optimisation will guarantee you a Lighthouse performance score above 80 with all Web Vitals passed. Starting with the performance audit, we can fairly accurate predict your performance ROI based on conversion results.
Can you really fix my store in one day?
Yes. Our engineers are Shopify performance specialists — this is all we do. We've refined our process to deliver measurable results within a single day for most stores.
How can you improve my store without risk?
We work in close cooperation with your development team and require a staging environment to work with (an exact clone, but without customer data). After extensive testing, your team can deploy our optimisations, making it a risk free process.
How fast can you experience results?
The performance gains are visible immediately after deployment. Your marketing efforts will benefit from improved page speed right away.
What our clients say about us
"Zinzo addressed the legacy code affecting our shop's speed performance, while developing some new features. As a result, the performance score already doubled, with more improvements following soon."
Guido Evers
Testa Omega-3
"The custom improvements to our webshop were done professionally, in close cooperation with our technical partner and delivered within 2 weeks. We immediately noticed the results in our analytics: in the first month we measured a 14% conversion rate increase from organic search and +81% increase on paid search."
Ronald Klijsen
Loints of Holland
"The core web vitals changed from 60 (fail) to +80 (pass) following the performance fix to one of our client's Magento webshop. Directly we saw the paid traffic conversions improve by almost 80%."
Akke Pennin
IWB Agency
"The Performance Audit not only gave me practical insights to technical changes, but I also got important feedback how to improve the conversion rate in the buyer journey. Great value!"
Tim Dekens
The Change Starts
"Zinzo built a custom Shopify store that aligns perfectly with my brand, implementing every detail as I envisioned while maintaining clear communication throughout the process."
Susan van Elteren
Noble Xi
"Working with Zinzo was personal, efficient, and delivered a great result: a scalable Shopify solution for our unique gift assortment."
Lennert Rietveld
Geschenken van Vroeg
"Zinzo delivered exactly what we needed — fast, technically solid, and with clear communication throughout. Their Shopify engineering expertise really stood out, especially in making our store fully multilingual and scalable for international growth. Complex requirements were handled smoothly, feedback was picked up quickly, and responses were always within a day. We're extremely happy with the end result and the way the team works."
Yannick Haverkamp
Tote Label
"This team has the expertise and is fast. We migrated from MijnWebwinkel to Shopify and they help us at every step. Super."
Arend-Jan Majoor
StopMijnAfval