Gencer Karakaya
Summary
Senior Shopify Developer with 6+ years of experience. I have worked on 65+ Shopify stores for US and international brands across apparel, mobility, home goods, marble and stone, and personalized product industries. I build custom Shopify themes, custom applications, and API integrations, and handle SEO/GEO optimization and performance-focused e-commerce solutions. I care about writing clean, maintainable, and reusable code that other developers can pick up without friction. I work closely with e-commerce teams on performance, SEO, user experience, and scalable theme architecture.
Career highlights
- 6+ years of Shopify experience
- 65+ Shopify stores delivered
- 20+ Shopify integrations
- 10+ public and custom apps
- 100+ theme features shipped
- Shopify Plus and Markets
- Public and custom app development
- SEO and GEO (Generative Engine Optimization)
- Core Web Vitals and Lighthouse
- Custom product builders and personalization
Experience
Transfer Kingdom · USA
06.2025 - Present- Build and maintain custom Shopify themes for multiple US brands using Shopify Liquid, JavaScript, and CSS.
- Develop reusable sections, snippets, and theme components to keep projects scalable and easier to maintain.
- Build custom product builders, advanced variant selection, product personalization features, and bundle pricing logic.
- Develop AJAX Cart, Cart Drawer, and dynamic storefront experiences using Shopify's Section Rendering API.
- Work on Shopify Plus storefronts serving international markets, customizing Shopify Markets, localization, multi-language, and multi-currency setups based on business requirements.
- Work with Shopify Admin API, Storefront API, Webhooks, Metafields, and Metaobjects to build custom store functionality.
- Develop and maintain Shopify Public Apps, and integrate Theme App Extensions and App Embeds into storefronts.
- Manage media storage and file delivery using Amazon S3 and Cloudflare R2.
- Improve Core Web Vitals and Lighthouse scores across multiple storefronts by reducing render blocking resources and reworking front-end architecture.
- Handle SEO and GEO (Generative Engine Optimization) improvements, including Schema Markup, JSON-LD, AI crawler optimization, indexing, and crawlability.
- Collaborate with designers and backend developers using Git and Shopify CLI throughout development and deployment.
EZ Commerce US · USA
01.2023 - 05.2025- Developed and maintained Shopify stores for brands across multiple industries.
- Customized Shopify themes and built reusable storefront components using Shopify Liquid, JavaScript, HTML, and CSS.
- Built store-specific custom Shopify applications to automate workflows and extend storefront functionality.
- Integrated and customized Shopify apps based on each merchant's business requirements.
- Worked with Shopify Admin API, Storefront API, Metafields, and Metaobjects to deliver custom solutions.
- Improved Core Web Vitals, page speed, and overall storefront performance.
- Performed SEO and GEO improvements, including structured data, Schema Markup, JSON-LD, AI crawler optimization, indexing, and crawlability.
- Developed upsell, cross-sell, bundle, and product recommendation features to support conversion rate optimization (CRO).
- Managed Amazon, eBay, and Etsy marketplaces, including product listings, catalog optimization, and inventory management.
- Used Google Analytics, Google Search Console, Ahrefs, and Semrush to analyze store performance and identify optimization opportunities.
- Worked with Git throughout development, testing, and deployment.
Regis Interactive · TR
05.2019 - 12.2022- Assisted in the development, customization, and maintenance of Shopify stores across different industries.
- Customized Shopify themes using Shopify Liquid, JavaScript, HTML, and CSS.
- Integrated Shopify apps and implemented storefront features based on client requirements.
- Managed products, collections, and store content to improve the customer experience.
- Performed SEO improvements, including metadata optimization, Schema Markup, site structure, and page performance enhancements.
- Contributed to Core Web Vitals and storefront performance optimization.
- Managed Amazon, eBay, and Etsy marketplace operations, including product listings, catalog optimization, and inventory management.
- Managed Google Ads and Meta Ads campaigns while monitoring and optimizing campaign performance.
- Analyzed website performance using Google Analytics and Google Search Console.
- Managed Klaviyo email marketing campaigns and marketing automation workflows.
- Worked closely with clients throughout development, testing, and production deployment.
Technical skills
Shopify & E-commerce
Liquid, Shopify Plus, Storefront API, Admin API, Section Rendering API, Shopify CLI, Webhooks, Metafields, Metaobjects, App Proxies, Theme App Extensions, App Embeds, Public & Custom Apps, Shopify Markets, Shopify Functions, Checkout Extensibility
Frontend
JavaScript (ES6+), HTML5, CSS3, Tailwind CSS, AJAX Cart, Cart Drawer, Web Components, React (basic)
APIs & Integrations
GraphQL, REST, Admin GraphQL API, Storefront API, Webhooks, App Proxies, ERP / CRM / PIM integrations, Postman
Performance
Core Web Vitals, Lighthouse, theme optimization, render-blocking resource reduction, image and asset delivery, Theme Check
SEO & GEO
Technical SEO, Schema Markup, JSON-LD, structured data, indexing and crawlability, llms.txt, AI crawler optimization, AI search visibility
Infrastructure & Tools
Git, GitHub, GitHub Actions, CI/CD, Shopify CLI, Amazon S3, Cloudflare R2, Figma
Marketing & CRO
A/B testing, upsell and cross-sell, bundles, product recommendations, Klaviyo, Shopify Flow, Google Ads, Meta Ads, Google Analytics, Google Search Console, Ahrefs, Semrush, Screaming Frog
Marketplaces
Amazon (FBA/FBM), eBay, Etsy, catalog optimization, inventory management
Industries
Products I built
Shopify
- BlogPilot AI · AI-powered SEO content generation and blog automation platform for Shopify merchants.
- AgentRank · Audits how visible a Shopify store is to AI search engines (GEO) and returns concrete improvements.
- Stockcast · Analyzes sales history to forecast stock and support inventory planning.
ikas
- AI Ad Analysis for Google & Meta · Analyzes Google Ads and Meta Ads campaigns with AI, finds wasted budget, and returns actionable recommendations.
- AI SEO Assistant · Scans the store for SEO gaps and generates optimized meta titles, descriptions, product content, and keywords.
- AI SEO & AI Visibility · Optimizes products for Google and AI search engines like ChatGPT, Gemini, and Perplexity, and tracks AI visibility.
7 Shopify Academy certifications · Credly verified
- Introduction to Shopify Liquid
- Liquid Optimization for Theme Development
- Shopify Plus Certifications
- Shopify 101 & Cross-Border Sales
- POS, Retail & Shopify Plus Fundamentals
- Data & Analytics 101 · Marketing · Merchants
- Product Development Opportunities
Selected clients
Transfer Kingdom · Ready2Transfer · Culver Mobility · Alton Mobility · Anna and Sarah · Sarah's Candy Factory · ONS Marble · Flamora Marble · Valente Stone · Viola Stone Studio · VitaStone Marble · Luxury Marble Sink and 65+ Shopify stores in total
27 storefront case studies: gencerkarakaya.com/work
Education
Akdeniz University · Associate Degree in Accounting · 2010-2012
Languages
Turkish · Native
English · Professional reading and writing, conversational speaking