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E-Commerce Development Services: Conversion-Focused Online Stores

E-commerce development that converts: headless Shopify, Medusa, custom Next.js. Conversion-focused UX, Core Web Vitals, B2B wholesale, subscriptions. Platform comparison and case studies.

📖 5 min read
E-commerce development services showing platform options, conversion UX, and technical stack

E-Commerce Development Services: Conversion-Focused Online Stores

We build e-commerce experiences that convert — not just "look good." Every decision is backed by UX patterns proven to increase conversion rate and average order value. From cms-comparison-wordpress-sanity-strapi-2026" class="internal-link">headless Shopify to custom Medusa builds.

Our E-Commerce Development Services

1. Platform Selection & Architecture

  • **Headless Shopify (Hydrogen/Remix)** — Custom storefronts, B2B wholesale, markets
  • **Medusa / Saleor** — Open-source, self-hosted, full customization
  • **Custom (Next.js + Stripe/Razorpay)** — Maximum control, unique business logic
  • **Multi-Vendor / Marketplace** — Sharetribe, custom multi-tenant

2. Conversion-Focused UX Implementation

  • **Product Pages** — Gallery (zoom, video, 360°), variants, trust stack, urgency, UGC
  • **Cart & Checkout** — Slide-out drawer, single-page, guest default, express payments (Apple/Google Pay, UPI)
  • **Post-Purchase** — One-click upsells, order tracking, easy returns, review requests
  • **Mobile-First** — Sticky ATC, thumb-zone, PWA, offline cart

3. Technical Excellence

  • **Core Web Vitals** — LCP <2.5s, INP <200ms, CLS <0.1 on product/collection/checkout
  • **SEO** — Product schema, faceted nav, pagination, canonical, sitemaps
  • **Accessibility** — WCAG 2.2 AA, keyboard nav, screen reader, color contrast
  • **Performance** — Edge caching, image optimization (AVIF/WebP), code splitting

4. Integrations & Operations

  • **Payments** — Stripe, Razorpay, PayPal, BNPL (Klarna, Affirm), multi-currency
  • **ERP/OMS** — NetSuite, SAP, custom order management
  • **Email/SMS** — Klaviyo, Postscript, transactional + marketing automation
  • **Analytics** — GA4 Enhanced Ecommerce, server-side tracking, conversion API

5. B2B & Wholesale

  • **Customer-Specific Pricing** — Tiered, volume, contract-based
  • **Quick Order / Reorder** — CSV upload, SKU search, saved carts
  • **Net Terms / Credit Limits** — Approval workflows, aging reports
  • **Sales Rep Portal** — Quote management, commission tracking

Platform Comparison

| Platform | Best For | Customization | Dev Effort | Cost | |----------|----------|---------------|------------|------| | **Shopify Hydrogen** | D2C brands, fast launch | High (React) | Medium | $2K+/mo + dev | | **Medusa** | Custom needs, self-host | Maximum (Node.js) | High | Hosting + dev | | **Saleor** | Complex B2B, GraphQL | Maximum (Python/Django) | High | Hosting + dev | | **Custom Next.js** | Unique logic, full control | Unlimited | Highest | Dev only | | **Shopify Standard** | Standard D2C, low dev | Low (Liquid) | Low | $29-2K+/mo |

Our E-Commerce Stack

  • **Frontend**: Next.js 14, TypeScript, Tailwind, TanStack Query
  • **Payments**: Stripe, Razorpay, Apple Pay, Google Pay, UPI
  • **CMS**: Sanity (products/content), Shopify Admin (orders)
  • **Search**: Algolia / Meilisearch (faceted, instant)
  • **Email/SMS**: Klaviyo, Postscript (server-side events)
  • **Analytics**: GA4 Enhanced Ecommerce + Server-side GTM
  • **Monitoring**: Sentry, Vercel Analytics, web-vitals RUM

Project Types & Timelines

| Project Type | Timeline | Team | Investment | |--------------|----------|------|------------| | **Shopify Theme Customization** | 6-10 weeks | 2-3 | ₹10-25L | | **cms-comparison-wordpress-sanity-strapi-2026" class="internal-link">Headless Shopify (Hydrogen)** | 12-18 weeks | 3-4 | ₹25-50L | | **Custom Medusa/Saleor** | 16-24 weeks | 4-5 | ₹30-60L | | **Custom Next.js + Stripe** | 20-28 weeks | 4-6 | ₹40-80L | | **redesign-checklist-50-steps" class="internal-link">Migration (Platform → Platform)** | 8-16 weeks | 3-4 | ₹15-40L |

  • [E-Commerce UX Patterns That Convert](/blog/ecommerce-website-design-conversion-ux-patterns)
  • [Core Web Vitals Optimization 2026](/blog/core-web-vitals-optimization-guide-2026)
  • [Mobile-First Design Strategy 2026](/blog/mobile-first-design-strategy-2026)
  • [Headless CMS Comparison 2026](/blog/headless-cms-comparison-wordpress-sanity-strapi-2026)
  • [Website Cost 2026](/blog/website-cost-2026-complete-pricing-guide)

Case Studies

| Client | Platform | Result | |--------|----------|--------| | **D2C Fashion** | cms-comparison-wordpress-sanity-strapi-2026" class="internal-link">Headless Shopify + Next.js | +38% conversion, +22% AOV, 98 Lighthouse | | **Electronics** | Custom Medusa | +45% mobile revenue, 2.1s LCP, PWA | | **Home Goods** | Shopify + Custom Theme | +38% conversion, 40% faster checkout | | **B2B Wholesale** | Custom Next.js + Medusa | Net-30 terms, quick order, +60% repeat rate |

Engagement Models

| Model | Best For | Investment | |-------|----------|------------| | **Platform Implementation** | Shopify/Hydrogen/Medusa build | ₹25L-80L | | **redesign-checklist-50-steps" class="internal-link">Migration** | Platform → Platform | ₹15L-40L | | **CRO Retainer** | Ongoing optimization, A/B testing | ₹3-8L/mo | | **Platform Audit** | Technical + UX + SEO review | ₹3-8L |

FAQ

Frequently Asked Questions

**Which platform should I choose?**
Shopify Hydrogen for speed-to-market + custom storefront. Medusa for complex B2B/unique logic. Custom for unique business models. We'll recommend based on your requirements.

Frequently Asked Questions

**Can you migrate from Magento/WooCommerce/BigCommerce?**
Yes. We handle product/customer/order migration, URL redirects, SEO preservation, and parallel run validation.

Frequently Asked Questions

**Do you handle ongoing maintenance?**
Yes — CRO retainer (A/B testing, UX audits, performance monitoring) or platform maintenance (security updates, feature development).

Frequently Asked Questions

**What about subscriptions/memberships?**
Stripe Billing, ReCharge, Bold Subscriptions, or custom. We implement trial management, dunning, pause/cancel, gift subscriptions.

Frequently Asked Questions

**Do you support multi-currency/multi-language?**
Yes — Shopify Markets, Medusa regions, custom i18n. Currency conversion, local payment methods, geo-routing.

Ready to Build an E-Commerce Experience That Converts?

**Book a free e-commerce strategy call** → [ui-designer.in/ecommerce-development](https://ui-designer.in/ecommerce-development)

Or email **hello@ui-designer.in** with:

  1. Current platform (if migrating) or "new build"
  2. Product count & complexity (variants, bundles, subscriptions)
  3. B2C / B2B / Both
  4. Target markets & currencies
  5. Timeline & budget range

We respond within 4 business hours with platform recommendation and rough estimate.