Make the theme you havedo what you need.
You do not always need a new store. We add the sections, templates and fixes your current theme is missing, without breaking theme updates or slowing the page down.
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In short
Byteinfy customises existing Shopify themes from $1,000: new sections, landing page templates and product page upgrades built update-safe, without slowing the store down.
Last updated 5 September 2026 · Written by the Byteinfy team, which builds and operates SwipeReel and myBillPlease.
Who it is for
- Stores on Dawn, Impulse, Prestige or another premium theme
- Marketing teams that need landing pages without a developer
- Brands whose product page needs bundles, size guides or UGC
- Anyone whose last agency left inline hacks everywhere
What you get
- New sections and blocks, editable in the theme editor
- Landing page templates for campaigns and ads
- Product page upgrades: bundles, variants, sticky add to cart, trust blocks
- Cleanup of legacy code and unused apps that slow the theme
- A changelog of every edit, so updates stay safe
How it works
- 1
Audit
We read the theme, list what is custom, what is broken and what is slow, and price the work as fixed items.
- 2
Build
Every change on a duplicate theme, demoed to you before it touches the live store.
- 3
Ship
Published in a low-traffic window with a rollback theme kept for a week.
Pricing
From $1,000
Most customisation projects are a fixed $1,000 to $3,000: a set of sections, a landing page system, or a focused conversion pass.
Questions we get asked
- Will this break my theme updates?
- No. We build sections as separate files and avoid editing core theme files where a section or snippet will do.
- Can you work with our existing apps?
- Yes, and we tell you which ones are costing you speed. Removing two apps often does more for conversion than adding a section.
- Do you offer this as a retainer?
- Yes. See Maintenance & Support for a monthly plan with a bank of hours.
Further reading
From the Byteinfy blog, where we write up what we learn doing this work.
Often paired with
Shopify Store Development
New stores, custom sections, checkout extensions and headless builds that pass Shopify's performance bar.
See what is includedFrom $750Shopify Speed Optimization
Core Web Vitals fixed at the source: theme code, app bloat and images.
See what is includedFrom $500 / monthMaintenance & Support
A monthly retainer: updates, monitoring, fixes and a bank of development hours.
See what is includedNeed Shopify Theme Customization?Let us scope it this week.
A scoped plan, a timeline and a fixed quote, usually within 48 hours of the first call.