Shopify Custom Development & Theme Customization

SHOPIFY DEVELOPMENT · TORONTO

Custom Shopify development for brands that have outgrown the theme editor.

Custom Shopify themes, Sections 2.0, Shopify Functions, Checkout Extensions, and headless Hydrogen storefronts. When off-the-shelf themes can’t deliver your brand or UX, we code what you need from scratch.

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90+

Lighthouse on launch

25+

Years in web tech

200+

Ecommerce projects

100%

In-house Toronto team

TRUSTED BY BUSINESSES ACROSS CANADA

Shopify Partner
★ 5.0 on Google
Est. 1999
Toronto-based

OUR DEVELOPMENT PROCESS

How we build custom Shopify themes and features.

Custom development is where most agencies go over budget and underdeliver. We avoid that by running every build through the same four-phase process: scope tightly, build in sprints, test on staging, launch with confidence.

01

Scope & Estimate

We define exactly what you need — theme, sections, functions, integrations — and give a fixed quote with a realistic timeline. No surprise invoices.

02

Design & Prototyping

Figma prototypes before any code. You sign off on every section and interaction before our developers touch a keyboard.

03

Dev on Staging

All work happens on a development store. We commit to Git, run on CI, and ship clean Liquid, JavaScript, and CSS that any Shopify developer can read later.

04

Launch & Handoff

Launch day QA across devices, payment gateways, and user flows. Full documentation handed to your team (or ours, if you roll into ongoing management).

WHAT WE BUILD

Every layer of custom Shopify development. Covered.

Off-the-shelf themes work until they don’t. When you need real customization, these are the most common projects we take on.

Custom Themes

Fully bespoke Shopify themes built in Liquid + Online Store 2.0. 90+ Lighthouse scores, editable sections, and brand-perfect design.

Theme Customization

Deep customization of premium themes — Dawn, Impulse, Turbo, Prestige, Icon — when a full rebuild isn’t justified.

Sections & Blocks

New reusable sections, blocks, and templates for Online Store 2.0 so your merchandising team can edit without dev help.

Shopify Functions

Discount logic, delivery customization, payment method rules, and cart transforms — all via Functions on standard or Plus.

Checkout Extensions

Shopify Plus checkout customization: custom fields, upsells, trust signals, and branded checkout UX with Checkout Extensibility.

Headless (Hydrogen)

Full headless storefronts on Hydrogen + Oxygen or a custom React/Next.js stack with Shopify as the backend.

WHY CUSTOM DEVELOPMENT?

When to go beyond a theme editor.

Premium Shopify themes get you 80% of the way there. The last 20% — unique brand expression, merchandising flows, bespoke product configurators, B2B workflows, subscription logic, or checkout customization — is where custom development pays for itself.

Bryka has shipped custom themes, Shopify Functions, Checkout Extensions, and full headless Hydrogen storefronts for brands doing anywhere from $500K to $20M+ a year. Every project targets 90+ Lighthouse on launch and clean, maintainable code your team can read.

  • Online Store 2.0 compliant, merchant-editable
  • 90+ Lighthouse on desktop and mobile
  • Git-versioned, documented, and handoff-ready
  • Shopify Plus Functions and Checkout Extensions
  • Headless Hydrogen when performance demands it

WHAT WE BUILD ON

  • Shopify LiquidStandard themes, Online Store 2.0
  • Shopify FunctionsServer-side logic on Plus and standard
  • Checkout ExtensibilityPlus checkout UI extensions
  • Hydrogen + OxygenReact headless storefronts
  • Shopify Admin APICustom apps and admin extensions

Good fit

  • Brands with unique merchandising or UX requirements
  • Shopify Plus merchants ready to use Functions and Extensions
  • Stores needing subscription, B2B, or custom checkout logic
  • Teams wanting a maintainable, well-documented custom codebase
  • Merchants who need headless performance for cold traffic

Not the right time

  • Brand-new stores without proven demand yet
  • Budgets under ~$15K — a premium theme is better value
  • Teams unwilling to run a staging-and-QA workflow

IS CUSTOM DEV RIGHT FOR YOU?

Is custom Shopify development the right move?

Custom development is the right call when a premium theme can’t deliver your brand or your business logic, or when you’re on Shopify Plus and aren’t using the capabilities you’re paying for.

It’s not the right call for early-stage stores with unclear product-market fit — in those cases a premium theme with light customization will take you further with less risk.

WHY BRYKA

Why brands choose Bryka for custom development.

25+ Years in Web Tech

Founder Bryan has 25+ years of experience from Dell, eBay, autoTrader, and Yahoo.

90+ Lighthouse Standard

Every theme we ship targets 90+ Lighthouse on desktop, 80+ on mobile.

Plus Functions & Extensions

We actually use the Plus features you’re paying for.

Headless Capable

Hydrogen + Oxygen builds for brands that need bleeding-edge performance.

Maintainable Code

Documented, Git-versioned, handoff-ready — not black-box spaghetti.

Senior-Led, In-House

Toronto team. No juniors, no offshoring, no client handoffs.

FAQS

Shopify Custom Development questions, answered.

Shopify
Custom
Development


Almost anything. Custom themes in Liquid, section and block development for Online Store 2.0, custom storefront apps, Shopify Functions for discounts and shipping rules, custom checkout extensions on Plus, Hydrogen headless storefronts, and Shopify Admin app extensions.


Both. We customize Dawn, Impulse, Turbo, Prestige, and other premium themes when budget or timeline requires it. We build fully bespoke themes when brand and UX demand a unique experience. We always follow Online Store 2.0 standards so the merchant team can edit content without developer help.


Yes. We build headless Shopify storefronts on Hydrogen and Remix for brands that need bleeding-edge performance, custom UX, or tight integration with external systems. Hydrogen stores hosted on Oxygen can hit 90+ Lighthouse scores out of the box.


Yes. We build Checkout UI Extensions for custom fields, upsells, dynamic shipping, and branding on Shopify Plus. We also build Checkout Functions for custom discount logic and delivery customization using Shopify Functions.


Every custom theme we ship targets 90+ Lighthouse scores on desktop and 80+ on mobile. We lazy-load images, defer non-critical JS, minimize app injection, use Shopify’s native CDN, and benchmark Core Web Vitals before launch.