# Gencer Karakaya
# Updated: 2026-08-18

> Senior Shopify and Shopify Plus developer and e-commerce growth partner based in Turkey, serving merchants and agencies worldwide (remote). Builds custom themes and apps, checkout extensibility, enterprise migrations, and ERP/CRM/PIM integrations at 95+ Core Web Vitals, then grows the store with technical SEO, CRO and A/B testing, Klaviyo email flows, and marketplace listings.

Gencer Karakaya is a Senior Shopify Developer based in Turkey, serving merchants worldwide, available for freelance work worldwide (remote).

## Services
- Custom Shopify and Shopify Plus theme development (Liquid, JavaScript ES6+, TypeScript, Tailwind CSS)
- Theme customization and personalization on an existing store (sections, layout, and brand styling without a rebuild)
- Storefront bug fixes and small front-end jobs, quoted per task
- Custom brand storefronts: turning a brand identity into a Shopify theme, from design to launch
- Shopify app development (public App Store and custom apps, Remix, React, Node.js, Polaris, App Bridge)
- Custom private app development for store-specific workflows and automations
- Shopify app bug fixes, debugging, maintenance, and ongoing support
- Checkout Extensibility, Shopify Functions, and checkout UI extensions
- Platform migration to Shopify (Magento, Salesforce Commerce, WooCommerce, BigCommerce, and legacy stacks)
- Shopify API integration (Admin GraphQL & REST, Storefront API, webhooks, customer events)
- ERP, CRM, inventory, logistics, and payment gateway integrations
- Shopify Flow automation and Klaviyo email flows
- Shopify store performance optimization (Core Web Vitals 95+, page speed)
- Technical SEO and web accessibility (WCAG) for Shopify stores
- Conversion rate optimization (CRO) and A/B testing
- Storefront API & headless / Hydrogen + Oxygen builds
- Shopify store management: product, collection, and content setup, QA, and launch support
- GA4, Google Tag Manager, and ecommerce analytics setup

## Service pages
- Shopify Developer: https://gencerkarakaya.com/shopify-developer (Freelance Shopify developer with 6+ years and 65+ stores delivered. Custom themes, apps, migrations, and Core Web Vitals 95+. Available worldwide, remote.)
- Shopify Plus Developer: https://gencerkarakaya.com/shopify-plus-developer (Shopify Plus developer for Checkout Extensibility, Shopify Functions, B2B, and high-volume custom checkout. 6+ years, Core Web Vitals 95+, remote worldwide.)
- Shopify Theme Developer: https://gencerkarakaya.com/shopify-theme-developer (Custom Shopify theme developer building fast, modular Liquid themes from scratch. 65+ stores, Core Web Vitals 95+, OS 2.0 sections. Remote, worldwide.)
- Shopify SEO Expert: https://gencerkarakaya.com/shopify-seo (Technical Shopify SEO: fix crawl waste, canonicals, schema, and Core Web Vitals. Ahrefs and Screaming Frog audits by a developer who ships the fixes.)
- Shopify Speed Optimization: https://gencerkarakaya.com/shopify-speed-optimization (Shopify speed optimization to pass Core Web Vitals (LCP, INP, CLS) and hit 95+. App and script audit, lazy loading, theme refactor. Remote, worldwide.)
- Shopify CRO Expert: https://gencerkarakaya.com/shopify-cro (Shopify conversion rate optimization by a developer: product page rebuilds, trust signals, upsell and cross-sell, and A/B testing that lifts AOV. Remote, worldwide.)
- Shopify Email Marketing & Klaviyo Expert: https://gencerkarakaya.com/shopify-email-marketing (Klaviyo email marketing for Shopify by a developer: abandoned cart, welcome and win-back flows, segmentation, and Shopify Flow automation that lifts repeat revenue.)
- Shopify Migration Expert: https://gencerkarakaya.com/shopify-migration (Enterprise Shopify Plus migration from WooCommerce, Magento, or BigCommerce without losing SEO. Data, redirects, ERP/CRM/PIM re-integration, zero downtime.)
- Shopify App Developer: https://gencerkarakaya.com/shopify-app-developer (Shopify app developer building public App Store and custom private apps with Remix, React, Node.js, and Polaris. Admin GraphQL, webhooks, App Store submission.)
- Shopify Markets Expert: https://gencerkarakaya.com/shopify-markets-expert (Shopify Markets setup for multi-currency, multi-language, and cross-border selling. Hreflang, localized content, and international SEO done right. Remote.)
- Shopify & E-commerce Developer in Dubai: https://gencerkarakaya.com/shopify-developer-dubai (Shopify developer for Dubai and UAE merchants. AED multi-currency, Arabic and English stores, Tabby, Tamara, COD, UAE VAT. Remote, English-speaking.)

## Case studies
- Shopify Speed Optimization: from a sluggish theme to Core Web Vitals 95+: https://gencerkarakaya.com/case-studies/shopify-speed-optimization (How a slow, app-heavy Shopify store was taken to a 95+ Core Web Vitals score by auditing scripts, fixing LCP, and refactoring the theme. Method and results.)
- Shopify Markets: launching multi-currency, multi-language selling without SEO loss: https://gencerkarakaya.com/case-studies/shopify-markets-internationalization (How a single-market Shopify store expanded to multi-currency, multi-language selling with Shopify Markets, correct hreflang, and indexable translations.)
- Shopify CRO: rebuilding the product page to lift average order value: https://gencerkarakaya.com/case-studies/shopify-cro-product-page (How a product page rebuild with clearer hierarchy, trust signals, and upsell and cross-sell flows lifted average order value on a Shopify store.)
- Shopify Theme Migration: rebuilding a bloated theme into clean, modular Liquid: https://gencerkarakaya.com/case-studies/shopify-theme-migration (How a hard-to-maintain Shopify theme was rebuilt into clean, modular Online Store 2.0 Liquid, faster and editable, without changing how the store looked.)

## Glossary
- Shopify Liquid: Liquid is Shopify's open-source templating language. It is the backbone of Shopify themes, used to load dynamic store data (products, collections, cart) into HTML at render time.
- Online Store 2.0: Online Store 2.0 is Shopify's theme architecture built around sections and blocks that merchants can add, remove, and reorder in the theme editor, with metafields for structured content.
- Shopify Plus: Shopify Plus is Shopify's enterprise tier. It unlocks Checkout Extensibility, Shopify Functions, B2B, Expansion Stores, and higher API limits for high-volume merchants.
- Checkout Extensibility: Checkout Extensibility is Shopify Plus's modern, upgrade-safe way to customize checkout using checkout UI extensions and Shopify Functions, replacing the legacy checkout.liquid and Checkout Scripts.
- Shopify Functions: Shopify Functions let developers customize backend logic (discounts, delivery and payment options, validation) with code that runs on Shopify's infrastructure, replacing legacy Scripts.
- Storefront API: The Storefront API is Shopify's GraphQL API for building custom and headless storefronts, giving full control over data fetching and the shopping experience outside the standard theme.
- Hydrogen: Hydrogen is Shopify's React-based framework for building headless storefronts on the Storefront API, typically deployed on Shopify's Oxygen hosting.
- Shopify Markets: Shopify Markets is Shopify's built-in toolset for international selling: multiple currencies, languages, localized pricing, and per-region settings managed from a single store.
- Metafields and Metaobjects: Metafields add custom fields to Shopify resources like products and collections; metaobjects define custom, reusable data structures. Together they model bespoke store data without custom apps.
- Core Web Vitals: Core Web Vitals are Google's user-experience metrics: Largest Contentful Paint (loading), Interaction to Next Paint (responsiveness), and Cumulative Layout Shift (visual stability). They influence rankings.
- Technical SEO: Technical SEO is the practice of improving how search engines crawl, index, and render a site: canonicals, crawl budget, structured data, site speed, and clean information architecture.
- Headless commerce: Headless commerce decouples the storefront (frontend) from the commerce backend, connecting them via APIs like the Storefront API. It trades simplicity for full control over the user experience.
Full glossary: https://gencerkarakaya.com/glossary

## Expertise
Shopify, Shopify Plus, Liquid, JavaScript, TypeScript, React, Next.js, Remix, Node.js, Polaris, App Bridge, Tailwind CSS, Admin GraphQL API, Storefront API, Webhooks, Checkout Extensibility, Shopify Functions, Shopify Flow, Hydrogen, Oxygen, Headless Commerce, Platform Migration, Technical SEO, Core Web Vitals, Web Accessibility, Klaviyo, GA4, Google Tag Manager, Conversion Rate Optimization

## Contact
- Email: gencerkrky@gmail.com
- LinkedIn: https://www.linkedin.com/in/gencerkarakaya
- GitHub: https://github.com/gencerkrky
- Hire page: https://gencerkarakaya.com/hire
- All services: https://gencerkarakaya.com/services
- Resume: https://gencerkarakaya.com/resume
- Case studies (27 Shopify storefronts): https://gencerkarakaya.com/work

## Recent articles
- [Shopify Desarrolladores: La Plataforma Técnica Que Cambia en](https://gencerkarakaya.com/blog/shopify-desarrolladores-guia-tecnica-2026): Shopify ha transformado radicalmente su plataforma para desarrolladores en 2026 con Functions, MCP, CLI 4.0 y comercio agente. (Markdown: https://gencerkarakaya.com/blog/shopify-desarrolladores-guia-tecnica-2026.md)
- [Lead Time and Demand Variability: The Two Numbers That Drive Every Reorder](https://gencerkarakaya.com/apps/stockcast-inventory-forecast/lead-time-demand-variability-reorder-point) [Stockcast: Inventory Forecast]: Lead time and demand variability are the two inputs that determine every reorder point and safety stock level. (Markdown: https://gencerkarakaya.com/apps/stockcast-inventory-forecast/lead-time-demand-variability-reorder-point.md)
- [Agentic Commerce: How AI Shopping Agents Buy on Your Customers' Behalf](https://gencerkarakaya.com/apps/agentrank/agentic-commerce-ai-shopping-agents) [AgentRank]: Agentic commerce is reshaping Shopify stores as AI agents now discover, compare, and buy products autonomously. (Markdown: https://gencerkarakaya.com/apps/agentrank/agentic-commerce-ai-shopping-agents.md)
- [Desarrollador Shopify: Qué Hace, Qué Sabe y Cómo Contratarlo Bien](https://gencerkarakaya.com/blog/desarrollador-shopify-roles-skills-costos): Un desarrollador Shopify no es un perfil único: hay especialistas en themes, apps y headless con stacks y tarifas muy distintas. (Markdown: https://gencerkarakaya.com/blog/desarrollador-shopify-roles-skills-costos.md)
- [How Much Does Going Headless with Shopify Cost? The Full Stack Answer](https://gencerkarakaya.com/blog/going-headless-shopify-cost-full-breakdown): Going headless with Shopify costs $10K to $300K+ to build, plus $2K to $15K monthly to run. (Markdown: https://gencerkarakaya.com/blog/going-headless-shopify-cost-full-breakdown.md)
- [Magento Migration to WooCommerce: What to Configure After the Data Transfer](https://gencerkarakaya.com/blog/magento-woocommerce-migration-post-setup): Migrating from Magento to WooCommerce means more than moving data. Learn the exact post-migration setup steps that protect your SEO, speed, and revenue. (Markdown: https://gencerkarakaya.com/blog/magento-woocommerce-migration-post-setup.md)
- [Multi-Location Inventory Management on Shopify: A Practical Guide](https://gencerkarakaya.com/apps/stockcast-inventory-forecast/shopify-multi-location-inventory-management) [Stockcast: Inventory Forecast]: Master multi-location inventory on Shopify: location limits by plan, fulfillment priority rules, transfer strategies, and per-location reorder logic (Markdown: https://gencerkarakaya.com/apps/stockcast-inventory-forecast/shopify-multi-location-inventory-management.md)
- [Google SEO Is Not Dying. But the Rules Just Changed for E-Commerce](https://gencerkarakaya.com/apps/agentrank/google-seo-dying-ecommerce-ai-search) [AgentRank]: Google SEO is not dying, but AI search is restructuring who gets the click. Here is the dual-channel playbook every e-commerce brand needs right now. (Markdown: https://gencerkarakaya.com/apps/agentrank/google-seo-dying-ecommerce-ai-search.md)
- [Why Headless Shopify Wins the GEO Race for Enterprise Brands in ChatGPT and Perplexity](https://gencerkarakaya.com/apps/blogpilot-ai/headless-shopify-geo-enterprise-chatgpt-perplexity) [BlogPilot AI]: Headless Shopify gives enterprise brands a structural GEO edge in ChatGPT and Perplexity by combining server-side rendering, clean schema control (Markdown: https://gencerkarakaya.com/apps/blogpilot-ai/headless-shopify-geo-enterprise-chatgpt-perplexity.md)
- [Doppelte Inhalte bei Shopify: Was Sie sind und wie man sie behebt](https://gencerkarakaya.com/blog/shopify-doppelte-inhalte-beheben): Doppelte Inhalte bei Shopify entstehen durch Produkt-URLs, Tag-Seiten und Paginierung. (Markdown: https://gencerkarakaya.com/blog/shopify-doppelte-inhalte-beheben.md)
- [How to Create and Manage Purchase Orders for a Shopify Store](https://gencerkarakaya.com/apps/stockcast-inventory-forecast/shopify-purchase-order-management-guide) [Stockcast: Inventory Forecast]: Learn how to create, track, and manage purchase orders for your Shopify store, from supplier setup to receiving inventory, with a step-by-step workflow. (Markdown: https://gencerkarakaya.com/apps/stockcast-inventory-forecast/shopify-purchase-order-management-guide.md)
- [How to Run Weekly AI Visibility Tests for Your Shopify Store](https://gencerkarakaya.com/apps/agentrank/weekly-ai-visibility-tests-shopify) [AgentRank]: Learn exactly how to run weekly AI visibility tests for your Shopify store and prove whether ChatGPT, Perplexity, and Gemini recommend your products. (Markdown: https://gencerkarakaya.com/apps/agentrank/weekly-ai-visibility-tests-shopify.md)
- [How to Turn Product Pages into Blog Content That Ranks for Buyer Keywords](https://gencerkarakaya.com/apps/blogpilot-ai/product-page-to-blog-content-buyer-keywords) [BlogPilot AI]: Learn how to repurpose your Shopify product pages into SEO blog posts that rank for high-intent buyer keywords and drive compounding organic traffic. (Markdown: https://gencerkarakaya.com/apps/blogpilot-ai/product-page-to-blog-content-buyer-keywords.md)
- [Magento naar WooCommerce: De Complete Migratieguide voor Merchants](https://gencerkarakaya.com/blog/magento-naar-woocommerce-migratie-gids): Overweeg je een Magento naar WooCommerce migratie? Deze gids behandelt kosten, data-overdracht, SEO-behoud en de nieuwste WooCommerce 10.9-functies zodat (Markdown: https://gencerkarakaya.com/blog/magento-naar-woocommerce-migratie-gids.md)
- [Headless Shopify Cost: The 24-Month Total Ownership Model Agencies Don't Show You](https://gencerkarakaya.com/blog/headless-shopify-cost-24-month-tco): Headless Shopify costs far more than the build quote suggests. This guide breaks down the full 24-month total cost of ownership, including the 2026 (Markdown: https://gencerkarakaya.com/blog/headless-shopify-cost-24-month-tco.md)

## Other languages
- Türkçe: https://gencerkarakaya.com/tr/llms.txt
- Deutsch: https://gencerkarakaya.com/de/llms.txt
- Español: https://gencerkarakaya.com/es/llms.txt
- Français: https://gencerkarakaya.com/fr/llms.txt
- Italiano: https://gencerkarakaya.com/it/llms.txt
- Nederlands: https://gencerkarakaya.com/nl/llms.txt
- 日本語: https://gencerkarakaya.com/ja/llms.txt