I am a Senior Shopify Full Stack 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 to create responsive, conversion-focused experiences. I’ve led end-to-end Shopify projects—from concept to launch—including complex migrations, custom app development, and third-party integrations. I’m a clear communicator and natural team leader, thriving in fast-paced, remote environments and collaborating with cross-functional teams to deliver projects on time and within budget. I’m passionate about optimizing performance and driving business results, with a track record of improving conversion rates and operational efficiency.

Carlos Quintero

I am a Senior Shopify Full Stack 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 to create responsive, conversion-focused experiences. I’ve led end-to-end Shopify projects—from concept to launch—including complex migrations, custom app development, and third-party integrations. I’m a clear communicator and natural team leader, thriving in fast-paced, remote environments and collaborating with cross-functional teams to deliver projects on time and within budget. I’m passionate about optimizing performance and driving business results, with a track record of improving conversion rates and operational efficiency.

Available to hire

I am a Senior Shopify Full Stack 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 to create responsive, conversion-focused experiences. I’ve led end-to-end Shopify projects—from concept to launch—including complex migrations, custom app development, and third-party integrations.

I’m a clear communicator and natural team leader, thriving in fast-paced, remote environments and collaborating with cross-functional teams to deliver projects on time and within budget. I’m passionate about optimizing performance and driving business results, with a track record of improving conversion rates and operational efficiency.

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Experience Level

Expert
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Expert
Expert
Expert
Expert
Expert
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Intermediate
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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.
Lead Shopify Developer at Dinarys GmbH
May 1, 2024 - May 31, 2025
Led and mentored a team of developers to deliver custom Shopify Plus themes and enterprise migrations, achieving a 95% on-time delivery rate while ensuring scalability and high performance under heavy traffic. Spearheaded integration of over 7 third-party and custom-built apps, automating backend work and improving operational efficiency by 40%. Increased conversion rates by 25% by optimizing checkout, currency, and shipping configurations. Collaborated closely with project managers and stakeholders, overseeing technical delivery and ensuring 80% of projects were completed ahead of schedule while maintaining high standards in functionality and design.
Senior Shopify Developer at Webweit GmbH
April 1, 2022 - January 31, 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 across multiple stores. Reduced page load times by 30% through frontend optimization, including code splitting, lazy loading, and asset compression. Integrated over 4 third-party services (payment gateways, analytics, shipping APIs), improving data synchronization and increasing client satisfaction by 25%. Improved checkout experience and reduced cart abandonment by 25% and increasing completed purchases. Guided over 3 junior developers, introducing coding standards and review processes that improved delivery speed and code quality. Maintained platform stability by resolving production issues, ensuring high availability and minimal downtime.
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 Gulp a Digital
June 1, 2018 - November 30, 2021
Customized Shopify themes to create fully 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 developed advanced navigation, improving navigation and increasing conversion rates by 15%. Migrated several legacy platforms to Shopify, overseeing the end-to-end migration process and ensuring zero data loss and minimal disruption to client operations.
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.

Education

Master’s Degree in Computer Science at Benedict College
February 1, 2014 - March 1, 2018
Master's Degree in Computer Science at Benedict College
February 1, 2014 - March 1, 2018

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Retail, Professional Services, Other

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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