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Shopify Services

London-based Shopify agency offering theme development, app builds, replatforming, conversion optimisation, and ecommerce growth strategy.

Strategy & Engineering
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Strategy, creative, technology, and marketing that compound

Most agencies sell deliverables. We build commerce foundations. As a London-based Shopify agency, we help ambitious brands grow through custom theme architecture, app development, replatforming, conversion optimisation, and data-driven marketing, from first launch through to Shopify Plus scale.

You rarely need one service in isolation. What matters is whether your storefront, data layer, and growth model can carry the revenue you are aiming for. Whether that means a performance-focused rebuild, a complex integration, or a full replatform, we combine strategy, design, and engineering to get you there.

Book a discovery call or explore each service area below. For context, our guides on Shopify operating costs and Online Store 2.0 are a good place to start.

Tailored Solutions

Strategy

We work on the foundations before you scale spend. Conversion optimisation, positioning, and market research for brands that want real numbers behind their decisions.

Shopify growth strategy, conversion rate optimisation, brand discovery, market analysis, and personalisation

Book a FREE consultation

Conversion Rate Optimisation

We run audits and test programmes focused on contribution margin and checkout completion. The friction that hurts most is usually buried in product discovery, merchandising, or the purchase flow, and it gets worse as traffic grows.

Brand discovery

We help you nail positioning, value proposition, and audience fit before you pour money into creative and tech. You walk away with a framework your team can actually use, not a deck that gathers dust.

Market, Customer & Competitor Analysis

Category, customer, and competitive research that feeds into merchandising, acquisition, and retention. Based on how your market actually works, not recycled playbooks from a generic ecommerce blog.

Personalisation

Segmented journeys and lifecycle personalisation that lift repeat purchase and LTV without bolting on apps you do not need. Built around your data architecture from the start.

No Cookie Cutters

Creative

Brand systems and content architecture that hold up across channels. Built for consistency and commercial clarity, not a single campaign cycle.

Shopify branding, content strategy, design systems, and ecommerce data architecture

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Branding and Identity

Brand identities that work on the storefront, in campaigns, and across lifecycle touchpoints. Visual systems meant to convert, not just look good in a guidelines PDF.

Data Architecture

Metafield, metaobject, and content models that keep merchandising flexible as your catalogue and campaigns grow. Having data is one thing. Your theme and admin being able to use it without a developer on speed dial is another.

Content Strategy

Editorial and product content frameworks tied to search intent, conversion paths, and brand voice. Consistent across PDPs, collections, email, and social instead of siloed by channel.

Design System

Component libraries and design tokens that keep storefront updates fast, cohesive, and on-brand. Cuts the cost of iteration as your team scales content and campaign output.

Problem Solvers by Design

Technology

Custom Shopify engineering: theme architecture, apps, checkout extensions, and integrations. Built to maintain, not just to demo on launch day.

Shopify theme development, app development, UI extensions, replatforming, migrations, and integrations

Book a FREE consultation

Shopify Theme Development

Bespoke Online Store 2.0 themes with modular sections, lean asset loading, and admin controls your merchandising team can actually use. Performance and conversion structure are decisions you make at build time, not patches you chase later.

Shopify App Development

Custom apps and private integrations when off-the-shelf tools create overlap, fragility, or margin erosion. Built on Shopify's APIs with maintainability and merchant workflow in mind.

Shopify UI Extensions and Functions

Checkout and customer account extensions, plus Shopify Functions for pricing, delivery, and payment logic. For Shopify Plus brands that need checkout customisation without painting themselves into a corner.

Replatforming and Migration

End-to-end migrations from WooCommerce, Magento, BigCommerce, and custom platforms. Data mapping, URL redirects, theme rebuilds, and launch planning with minimal downtime and SEO continuity.

Integrations and System Optimisation

ERP, PIM, CRM, and fulfilment integrations wired into a coherent Shopify stack. We tidy data flow and cut app sprawl, which is the hidden tax on most stores trying to scale.

Growth Focused

Marketing

Retention and acquisition tied to unit economics. Loyalty, lifecycle marketing, and experimentation that compound LTV instead of chasing short-term ROAS.

Shopify loyalty strategy, email and SMS marketing, social media, personalisation, and A/B testing

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Loyalty and Subscription Strategy

Retention models (subscriptions, replenishment, loyalty programmes) designed around payback period and LTV, not signup volume alone. Sustainable growth needs customers who come back profitably.

Email and SMS Marketing

Lifecycle flows and campaign architecture hooked into your Shopify data layer. Post-purchase, win-back, and replenishment sequences based on behaviour, not a batch-and-blast calendar.

Social Media Marketing

Channel strategy and creative direction aligned to product margins and acquisition efficiency. Social should feed the storefront and retention stack, not sit off on its own as a content exercise.

Personalised UX and A/B Testing

Structured experimentation on merchandising, navigation, and offer presentation. We tie tests to revenue and margin impact. A variant that lifts orders but erodes profit is not a win.

Building a better commerce together

Our Trusted Partners

  • Shopify
  • Loox
  • Loop Subscriptions
  • Logbase
  • Klaviyo
  • LoyaltyLion
  • Skio
  • Shoplift
  • Gadget
  • Recharge

Shopify Services FAQs

We cover four areas: Strategy (conversion rate optimisation, brand discovery, market analysis, and personalisation), Creative (branding, content strategy, design systems, and data architecture), Technology (custom theme development, app development, UI extensions, replatforming, and integrations), and Marketing (loyalty, email and SMS, social media, and A/B testing). In practice these overlap. Strategy shapes creative, creative shapes technology, and technology is what makes marketing measurable.

Yes. We are a Shopify Partner agency working with Shopify and Shopify Plus merchants. Our technology work includes checkout UI extensions, Shopify Functions, multi-store architecture, and performance-focused theme builds for high-traffic stores. See our portfolio, including beauty & skincare work such as Medik8 and Filter by Molly-Mae.

Yes. Replatforming covers data migration, URL redirects, theme rebuilds, integration mapping, and launch planning. We migrate stores from WooCommerce, Magento, BigCommerce, custom platforms, and other ecommerce systems with minimal downtime and SEO continuity. If you are still weighing the platform decision, our guide on Shopify features and limitations is a useful starting point.

Custom theme development includes UX and design system planning, Online Store 2.0 architecture (sections, metafields, and app blocks), performance optimisation, accessibility, and admin customisation your team can use day to day. For what separates themes that scale from themes that stall, see our articles on Shopify theme architecture and theme mistakes that hurt conversion rates.

Premium themes get you live fast with broad layout options, but they often pick up app dependency, performance debt, and rigid merchandising patterns as traffic and campaigns get more complex. A custom theme is built around your catalogue, conversion paths, integrations, and team workflows from day one. That means lower modification cost over time and fewer structural walls as you grow. The trade-off is higher upfront investment for less friction over the next 12 to 24 months.

Book a free 30-minute discovery call via our contact page or the schedule link on this page. We will talk through your goals, current platform, timeline, and which of strategy, creative, technology, or marketing fits where you are right now. If you want to stress-test unit economics and retention before scaling acquisition, try our free Unit Economics Simulator.

Ready to build a Shopify foundation that scales?

From custom theme architecture to replatforming and conversion optimisation, we help brands get past structural constraints instead of launching another redesign that solves nothing.

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About our Shopify services

oContis Studio is a London-based Shopify development and strategy agency. We build custom themes, Shopify apps, handle replatforming and migration, conversion rate optimisation, and ecommerce growth strategy for brands in the UK and internationally.

On the technology side we work across Online Store 2.0 theme architecture, checkout UI extensions, Shopify Functions, ERP and PIM integrations, and performance optimisation. Strategy and marketing focus on contribution margin, customer lifetime value, and acquisition efficiency. For background on platform capabilities, storefront structure, and scaling trade-offs, see our guides on Online Store 2.0, high-performance theme architecture, ROAS vs profitability, and choosing the right Shopify plan.

Ready to discuss a project? Contact oContis Studio or explore our Shopify project portfolio. Browse work by industry: Fashion & Apparel, Beauty & Skincare, Auto/Moto, and Health & Wellness.