01
Slow mobile pages
Theme apps and third-party scripts adding seconds to mobile load times.
Slow mobile pages and high bounce rates on a Shopify store
Headless Shopify storefront performance
Rebuild the storefront in Next.js on Shopify's Storefront API: server-rendered product pages, CDN caching and fast search — with Shopify's own checkout.
Symptoms
Signs your platform has this problem
If several of these sound familiar, the plan below is where we would start.
02
Cart abandonment on mobile
Slow product transitions and clunky cart drawers frustrating shoppers.
03
Slow search on large catalogs
Filtering by size, color or price taking seconds.
Remediation plan
How we fix it, step by step
Each phase ends with a measurement, so you can see what changed before the next one starts.
01
Next.js storefront
Server Components rendering product pages with very little client JavaScript.
02
Edge caching and revalidation
Caching pages at the CDN and revalidating them from Shopify webhooks when products change.
03
Search with Algolia or Typesense
Typo-tolerant search and filters served from a dedicated search index.
04
Optimistic cart
Cart updates that appear instantly and sync with Shopify's Cart API in the background.
Technical checklist
Remediation checklist
What we check before a change goes to production:
- Move theme-app features into Next.js Server Components or remove them
- Cache catalog pages at the CDN with webhook-driven revalidation
- Serve search and filters from Algolia or Typesense
- Use optimistic cart updates for instant feedback
What we measure
We take a baseline first and report the same measurements after each change, from your own monitoring — evidence, not promised results.
- LCP
- Mobile field data at p75 on product and collection pages
- Conversion
- Mobile checkout conversion, compared in a controlled test
- Search time
- Time from keystroke to results
Related service
Web & frontend
Frontend engineering measured in field Core Web Vitals before and after, accessibility to WCAG AA, and replatforms shipped route by route with no freeze.
Explore Web & frontendQuestions
Questions about this remediation
Checkout stays on Shopify, including Shop Pay and Apple Pay, and inventory stays in Shopify. Apps that inject storefront scripts need a headless equivalent or a replacement, which we list during scoping.
Faster pages usually reduce bounce, and public studies have linked load time to conversion. Your own effect is measured, not assumed: we compare conversion in a controlled test after launch.
Related playbooks
Other engineering problem playbooks
GitHub Actions CI/CD pipeline speed optimization
Make CI fast enough that nobody waits on it: profile the slow steps, cache what can be cached, split tests across runners and run only what changed.
Kubernetes autoscaling and compute cost fix with Karpenter
Fix slow pod scheduling and idle nodes: set accurate resource requests, replace Cluster Autoscaler with Karpenter, and run interruptible workloads on spot.
Near-zero-downtime database migration playbook
Move a production database without a long maintenance window: stream changes with CDC, verify parity with shadow reads, and cut over in a short, rehearsed window with reverse replication ready for rollback.
Startup MVP build and launch
Ship the smallest product that proves your core workflow: scoped with you up front, built on a boring, scalable stack, and handed over with documentation and tests.
Want an engineer to look at this with you?
Send us the symptoms and any metrics you have. We'll reply within one business day, set up a call and agree what to measure before anything changes.