Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Hi, I’m Carlos Quintero, a Senior Shopify Developer with over 8 years of experience building high-performing, scalable e-commerce solutions, including Shopify Plus stores. I specialize in Liquid, Shopify APIs (REST & GraphQL), and modern front-end technologies, delivering responsive, scalable, and conversion-focused experiences. I’ve led end-to-end Shopify projects, migrations, custom app development, and third-party integrations. I’m a clear communicator and natural team leader, experienced in collaborating with cross-functional teams and delivering projects on time and within budget. I thrive in fast-paced, remote environments and am driven by business results and long-term growth.…Hi, I’m Carlos Quintero, a Senior Shopify Developer with over 8 years of experience building high-performing, scalable e-commerce solutions, including Shopify Plus stores. I specialize in Liquid, Shopify APIs (REST & GraphQL), and modern front-end technologies, delivering responsive, scalable, and conversion-focused experiences. I’ve led end-to-end Shopify projects, migrations, custom app development, and third-party integrations. I’m a clear communicator and natural team leader, experienced in collaborating with cross-functional teams and delivering projects on time and within budget. I thrive in fast-paced, remote environments and am driven by business results and long-term growth.

Carlos Quintero

Full Stack Developer, Web Developer, Front-End Developer, +2





Hi, I’m Carlos Quintero, a Senior Shopify Developer with over 8 years of experience building high-performing, scalable e-commerce solutions, including Shopify Plus stores. I specialize in Liquid, Shopify APIs (REST & GraphQL), and modern front-end technologies, delivering responsive, scalable, and conversion-focused experiences. I’ve led end-to-end Shopify projects, migrations, custom app development, and third-party integrations. I’m a clear communicator and natural team leader, experienced in collaborating with cross-functional teams and delivering projects on time and within budget. I thrive in fast-paced, remote environments and am driven by business results and long-term growth.…Hi, I’m Carlos Quintero, a Senior Shopify Developer with over 8 years of experience building high-performing, scalable e-commerce solutions, including Shopify Plus stores. I specialize in Liquid, Shopify APIs (REST & GraphQL), and modern front-end technologies, delivering responsive, scalable, and conversion-focused experiences. I’ve led end-to-end Shopify projects, migrations, custom app development, and third-party integrations. I’m a clear communicator and natural team leader, experienced in collaborating with cross-functional teams and delivering projects on time and within budget. I thrive in fast-paced, remote environments and am driven by business results and long-term growth.

Available to hire

Hi, I’m Carlos Quintero, a Senior Shopify Developer with over 8 years of experience building high-performing, scalable e-commerce solutions, including Shopify Plus stores. I specialize in Liquid, Shopify APIs (REST & GraphQL), and modern front-end technologies, delivering responsive, scalable, and conversion-focused experiences. I’ve led end-to-end Shopify projects, migrations, custom app development, and third-party integrations.

I’m a clear communicator and natural team leader, experienced in collaborating with cross-functional teams and delivering projects on time and within budget. I thrive in fast-paced, remote environments and am driven by business results and long-term growth.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

German

Advanced

Work Experience

Senior Shopify Full Stack Developer at Big

July 1, 2025 - December 1, 2025

Led development of a Shopify Plus store, delivering a production-ready platform in 2 months for 10K+ monthly users. Designed scalable API architecture using Shopify REST & GraphQL APIs, improving backend processing by 35%. Integrated 5 external systems (ERP, payments, marketing), reducing manual operations by 40% and improving data accuracy. Developed automated inventory synchronization using Vercel Cron Jobs, increasing data accuracy by 50%. Implemented B2B/B2C pricing logic using Shopify Functions and custom APIs, enabling segmented pricing and custom checkout. Reduced page load time by 30% through frontend optimization and AJAX-based interactions. Established CI/CD pipelines, improving deployment speed and reducing release errors.

Senior Shopify Developer at Webwelt GmbH

April 1, 2022 - January 1, 2024

Delivered custom Shopify applications using REST & GraphQL APIs, automating key business workflows by 30%. Built and customized Shopify themes using Liquid, HTML, CSS, and JavaScript, improving user engagement and contributing to higher conversion rates. Reduced page load times by 30% through frontend optimization (code splitting, lazy loading, and asset compression). Integrated over 4 third-party services (payment gateways, analytics, shipping APIs), improving data synchronization and client satisfaction by 25%. Improved checkout experience and reduced cart abandonment by 25% and increased completed purchases. Guided over 3 junior developers, introducing coding standards and review processes. Maintained platform stability with high availability and minimal downtime across client stores.

Junior Shopify Full Stack Developer at Gulupa Digital

June 1, 2018 - November 1, 2021

Customized Shopify themes to create responsive, visually appealing, and functional online stores, improving overall user experience and client satisfaction. Developed reusable components and templates, enabling faster delivery of future projects and reducing development time by 40% for subsequent builds. Enhanced site search and navigation, improving conversion rates by 15%. Migrated several legacy platforms to Shopify, overseeing end-to-end migration with zero data loss and minimal disruption to client operations. Identified optimal store performance and stability, contributing to design overhauls that modernized stores and increased user engagement.