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Senior eCommerce Full Stack Developer (Headless Shopify) This role is ideal for a senior-level full stack developer who enjoys building fast, scalable eCommerce experiences and working with modern headless architectures. You’ll be contributing directly to a high-performance DTC storefront, with a strong focus on speed, conversion, and clean integration patterns. What you’ll be doing You’ll take ownership of building and improving a headless Shopify storefront using modern tools like Hydrogen and Remix. The work spans both frontend and backend, so you should be comfortable moving between UI development and server-side logic. On the frontend, you’ll create reusable components, templates, and UI patterns that are optimized for performance and conversion. On the backend, you’ll handle data fetching, API orchestration, and integration workflows that keep the storefront running smoothly. A big part of the role involves integrating third-party services—things like CMS platforms, search tools, subscriptions, and personalization systems—so experience wiring together multiple systems is important. You’ll also spend time optimizing performance across the stack (client, server, and edge), improving Core Web Vitals, and making sure everything is accessible, SEO-friendly, and stable across browsers. What you’re expected to bring You should have strong full stack experience, especially with React and server-side JavaScript or TypeScript. Prior work with headless Shopify setups is important, particularly using Hydrogen and the Storefront API. You’ll need to be comfortable working with GraphQL, modern frameworks (like Remix or similar), and build tools such as Vite. Experience integrating tools like Klaviyo, Algolia, Contentful/Sanity, or subscription platforms is a big plus. This role also expects a solid understanding of eCommerce metrics—things like conversion rates, page speed, and user behavior—and how technical decisions impact them. Since this is a senior-level position, you should be confident making architectural decisions, troubleshooting production issues, and collaborating with cross-functional teams in an agile environment. Nice-to-have experience Hosting and deployment experience (edge platforms or modern hosting environments) CMS integrations (especially headless CMS setups) A/B testing or personalization work Experience working with fast-growing DTC brands Mentoring or guiding junior developers
Project ID: 40383712
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Active 25 days ago
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198 freelancers are bidding on average $14 USD/hour for this job

Hi, I’m a senior Full Stack Developer with strong experience in building high-performance, headless eCommerce solutions. I’ve worked extensively with React, TypeScript, and modern frameworks like Remix, along with Shopify’s Hydrogen and Storefront API to deliver fast, scalable storefronts. I’m comfortable owning both frontend and backend—building reusable UI components while also handling API orchestration, data fetching, and complex integrations. My experience includes integrating tools like CMS platforms (Contentful/Sanity), search (Algolia), and marketing systems such as Klaviyo. I focus heavily on performance optimization (Core Web Vitals), SEO, accessibility, and conversion-driven development. I’ve also worked on improving user journeys, implementing A/B testing, and ensuring seamless experiences across devices and browsers. I’m confident in making architectural decisions, debugging production issues, and collaborating with cross-functional teams in agile environments. Would love to contribute to building a fast, conversion-focused DTC storefront.
$15 USD in 40 days
9.1
9.1

Having tackled a variety of web and app development projects over our 18+ years in the industry, CnELIndia has consistently demonstrated our prowess in every aspect of full stack development. Be it HTML, PHP or Shopify, we are skilled in all the tools and technologies necessary for this project. Moreover, we have extensive knowledge of API integration and have successfully integrated numerous third-party services including CMS platforms, search tools, and personalization systems - exactly the kind of expertise this role requires. Our experience with GraphQL and modern frameworks such as React is fitting for your project's needs, with a particular emphasis on Headless Shopify implemented through Hydrogen and the Storefront API. We specialize in crafting blazing-fast, scalable eCommerce experiences to enhance conversion rates and improve other essential metrics. Plus, our ability to ensure stability across browsers and boost accessibility will help create an optimal user experience for your DTC storefront. As an agency that has worked with multiple fast-growing businesses like yours, we understand the importance of making architectural decisions that scale smoothly as well as optimizing performance across the stack. In addition to delivering top-tier technical solutions, collaborating with cross-functional teams is one of our fortes too. We would be delighted to contribute these skills towards a high-performance storefront that aligns with your vision!
$12 USD in 40 days
9.1
9.1

Dear , We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time. We are 25 years in this business and our technical specialists have strong experience in PHP, JavaScript, Website Design, HTML, Shopify, Full Stack Development, GraphQL, API Integration and other technologies relevant to your project. Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews. Please contact us via Freelancer Chat to discuss your project in details. Best regards, Sales department Tangram Canada Inc.
$20 USD in 5 days
9.0
9.0

Hey, I will build and optimize your headless Shopify storefront — Hydrogen, Remix, and Storefront API — focusing on component architecture, API orchestration, and third-party integrations like Klaviyo, Algolia, and your CMS. One approach I recommend: edge-side caching with stale-while-revalidate for GraphQL responses, which dramatically improves TTFB without sacrificing data freshness — a direct win for Core Web Vitals and conversion. Questions: 1) Which CMS are you using — Contentful, Sanity, or another? 2) Is the storefront already on Hydrogen, or is this a migration? Looking forward to your response. Best regards, Kamran
$15 USD in 40 days
8.5
8.5

Hi there, I can help create reusable UI components and manage API orchestration using Hydrogen and Remix. With over 9+ years of experience in full stack development, I’ve successfully integrated various services like Klaviyo and Algolia into eCommerce setups. My expertise in React, TypeScript, and GraphQL ensures a seamless experience across both frontend and backend. I also understand how technical choices affect metrics such as conversion rates and page speed. I’m well-versed in optimizing performance to enhance Core Web Vitals and improve accessibility, ensuring a stable experience across browsers. If you’d like to collaborate and take your project to the next level, I’m here to assist. Best Regards, Priyanka
$15 USD in 40 days
8.5
8.5

As a full-stack developer with over 7 years of experience, specializing in e-commerce solutions, your search for a Headless Shopify specialist ends here. I possess a unique skill set that makes me a perfect fit for this role as I've been actively involved in building and improving headless Shopify storefronts using Hydrogen and Remix, alongside modern tools like Vite. My focus on performance and conversion optimization aligns seamlessly with the requirements of your project. What sets me apart from other contenders is my dexterity both on the backend and frontend. I'm proficient in crafting reusable components, templates, and UI patterns that prioritize speed and effectiveness while simultaneously handling data fetching, API orchestration, and integration workflows on the backend. Moreover, my experience integrating third-party services like CMS platforms and personalized systems will facilitate a smooth incorporation of the necessary tools into the project.
$12 USD in 40 days
8.1
8.1

Hi there, I’m a senior full stack developer with strong experience in headless eCommerce, and I can help you build and scale a high-performance Shopify storefront with clean, maintainable architecture. I’ve worked extensively with Shopify Hydrogen, React, and modern stacks like Remix, handling everything from reusable UI components to GraphQL-based data layers and third-party integrations (CMS, search, subscriptions, and personalization tools). My focus is always on performance (Core Web Vitals), conversion optimization, and seamless user experience across devices. I’m comfortable owning architecture decisions, optimizing across client/server/edge, and collaborating in fast-paced environments. Kindly send me a message to discuss more. Thanks
$15 USD in 40 days
8.2
8.2

Hello, This is exactly the kind of work I focus on—building high-performance headless Shopify storefronts that balance speed, scalability, and conversion. I’ve worked across full-stack environments using React and modern server-side frameworks, with hands-on experience in headless Shopify setups using Hydrogen, Storefront API, and GraphQL. How I Add Value: • Build fast, reusable UI components optimized for performance and conversion • Handle backend logic, API orchestration, and seamless third-party integrations • Integrate tools like Klaviyo, search, CMS, and subscription systems • Optimize Core Web Vitals, SEO, and accessibility across client and server Technical Strength: • Strong experience with React, JavaScript/TypeScript, GraphQL, and modern tooling (Remix/Vite) • Comfortable making architectural decisions and improving system performance end-to-end • Experience working on eCommerce flows where CVR, speed, and UX directly impact revenue Approach: I focus on clean architecture, scalable integrations, and measurable improvements—ensuring every technical decision supports growth and user experience. If you’re looking for a developer who can take ownership of a headless Shopify stack and drive performance at scale, I’m ready to contribute. Best regards,
$12 USD in 40 days
8.4
8.4

As a seasoned full stack developer with over half a decade of experience, I reckon I'm the perfect fit for your venture. I am well-versed in React and Javascript/Typescript, delivering numerous scalable eCommerce solutions much like the one you're looking for. I have an extensive background in headless Shopify setups; particularly with Hydrogen and the Storefront API. My proficiency in GraphQL and modern frameworks such as Remix will undoubtedly contribute to your project's success. Bringing up-to-date technology into effect is my stronghold, be it visualizing user interfaces, handling data fetching on the backend side, or developing clean integration patterns. Your description mentions my familiarities precisely, Klaviyo, Algolia, Contentful/Sanity - I already have hands-on expertise in these fields along with many more. Apparently, this role requires understanding how technical decisions influence eCommerce metrics. My extensive experience in optimizing Core Web Vitals, improving conversion rates and page speed would come in handy here. Additionally, the knack for making architectural decisions and troubleshooting production issues allows me to bring quality results under any pressure situation. Thanks....
$15 USD in 40 days
8.0
8.0

Hi, At Doomshell, we have senior full-stack developers experienced in building high-performance headless Shopify storefronts using modern stacks like Hydrogen, Remix, and GraphQL. Our approach: We focus on creating fast, scalable, conversion-driven DTC experiences, combining clean frontend architecture with efficient backend integrations. What we’ll handle: Frontend (React / Hydrogen / Remix): • Reusable, performance-optimized UI components • Clean templates focused on conversion & UX • Mobile-first, accessible, and SEO-friendly design Backend & Integrations: • Shopify Storefront API (GraphQL) • API orchestration and data fetching • Integration with tools like Klaviyo, Algolia, Contentful/Sanity, subscriptions, etc. Performance Optimization: • Improve Core Web Vitals (LCP, CLS, TBT) • Optimize client, server, and edge performance • Ensure fast load times and smooth interactions Architecture & Scalability: • Clean, modular codebase • Scalable headless architecture • Ready for A/B testing and personalization Why Doomshell: ✔ Strong expertise in React, Node.js, and headless Shopify ✔ Experience with complex integrations & DTC storefronts ✔ Focus on performance, SEO, and conversion optimization Quick questions: • Are you already using Hydrogen/Remix or starting fresh? • Which third-party tools are currently integrated? We’re ready to contribute as a senior partner in building a fast, scalable headless Shopify experience. Best regards,
$14 USD in 40 days
7.9
7.9

Hi, Headless Shopify growth work is exactly where I add value. I can help improve your storefront with faster pages, cleaner integrations, and conversion-focused development using React. I’ve handled custom Shopify builds, API integrations, reusable components, and performance fixes that directly impact sales and user experience. I work like an owner—fast communication, clean code, and solving issues without hand-holding. If I joined today, would your first priority be **speed optimization, new features, or fixing current store issues**?
$8 USD in 40 days
7.6
7.6

Hello, I am an experienced full stack developer with a strong focus on building high-performance eCommerce solutions, particularly using Shopify and modern headless architectures. I have worked extensively with React, TypeScript, and integrations via the Storefront API, which enables me to create robust and scalable Shopify storefronts. My approach involves optimizing both frontend and backend components, employing reusable UI patterns for faster conversion rates and ensuring smooth API orchestrations to maintain efficient data flows. I suggest implementing performance monitoring tools to keep track of Core Web Vitals effectively. Best regards,
$25 USD in 29 days
6.9
6.9

Hello As a Senior Full Stack Developer specializing in headless Shopify, I build high-performance, conversion-driven e-commerce experiences. I offer deep expertise in modern frontend frameworks and robust backend API integrations. Let's architect a scalable, custom storefront to elevate your brand with an exceptional headless solution. Giáp Văn Hưng
$12 USD in 7 days
6.9
6.9

Hi! My name is Marjan and I'm here to offer you my services as a skilled applicant with over a decade of experience working on Freelancer.com. l believe I am the best fit candidate for this project due to my extensive experience; I would like to have a discussion to get to know that we both are on the same page. Once the scope will be locked, I will start working on it right away.
$20 USD in 40 days
6.9
6.9

I will do the development of your headless Shopify storefront using Hydrogen, Remix, React, and GraphQL, focusing on a fast, scalable, and conversion-optimized architecture. I will do frontend component development, backend API integration, and third-party service connections (CMS, search, subscriptions) with clean and reusable code. I will do full performance optimization, Core Web Vitals improvement, and ensure the site is SEO-friendly, accessible, and production-ready. Best Regards, Muhammad
$12 USD in 40 days
6.4
6.4

Hi - the real challenge in headless Shopify is not building components, it is keeping the entire product to checkout flow fast once multiple integrations are involved. These storefronts often benchmark well on static pages, but slow down when product data, recommendations, subscriptions, and tracking all fire together. That is where conversion drops, so I treat data orchestration and caching as part of the UX, not just backend logic. The flow is: user lands on a fast homepage -> browses collections -> opens product page with optimized GraphQL queries -> adds to cart with minimal latency -> checkout handoff remains smooth -> integrations like CMS, search, and personalization stay invisible to the user. The part to get right early is the data-fetching and caching strategy, because it affects both performance and conversion. This comes together cleanly once that layer is set right.
$15 USD in 40 days
6.4
6.4

Hi there, I have read your project requirement. You need a senior full-stack developer experienced in headless Shopify (Hydrogen + Remix) to build and optimize a high-performance DTC storefront—covering frontend UI development, backend/API orchestration, third-party integrations (CMS, search, subscriptions), and performance optimization (Core Web Vitals, SEO, conversion). We have strong experience building scalable eCommerce systems with React, Node.js/TypeScript, GraphQL, and API integrations, including performance tuning and clean architecture for high-traffic applications. We can contribute across the full stack—component-driven UI, data fetching layers, and integration workflows—while ensuring speed, stability, and maintainability. A few questions: ============= Are you currently using Hydrogen (v2/Remix) or planning a fresh headless setup? Which third-party tools are already in place (Klaviyo, Algolia, CMS, subscriptions)? What are your current performance benchmarks (Core Web Vitals, load time, conversion)? Is this a long-term engagement with ongoing optimization or a defined project scope? Best Regards, Srashtasoft Team
$12 USD in 40 days
6.5
6.5

Hi, I understand you need a senior full stack developer for a headless Shopify storefront built around speed, conversion, and scalable integration patterns. The role clearly goes beyond theme work and requires strong ownership across Hydrogen, Remix, Shopify Storefront API, and third party services that shape the full ecommerce experience. My approach would be to work across both frontend and backend layers, building reusable React components and performant storefront templates while also handling GraphQL data flows, API orchestration, and service integrations such as CMS, search, subscriptions, and personalization. I focus on clean architecture, maintainable TypeScript, and performance tuning that improves Core Web Vitals, accessibility, SEO, and conversion outcomes. I am also comfortable troubleshooting production issues and making practical architectural decisions in fast moving ecommerce environments. Before delivery, I will test storefront performance, API reliability, responsive behavior, cross browser consistency, accessibility, and critical ecommerce journeys to ensure stable and measurable results. Best, Justin
$40 USD in 40 days
6.2
6.2

Hi, I’m a senior full stack developer with strong experience building headless Shopify storefronts using Hydrogen, Remix, and modern React-based architectures. I’m comfortable owning both frontend and backend work, including reusable UI systems, server-side logic, and API orchestration for scalable eCommerce setups. I’ve worked extensively with GraphQL, Shopify Storefront API, and third-party integrations like CMS (Sanity/Contentful), search (Algolia), and marketing tools (Klaviyo), with a strong focus on performance, Core Web Vitals, and conversion optimisation. I also have experience making architectural decisions in production environments and improving storefront speed, stability, and SEO for DTC brands. Happy to discuss how I’d approach your stack and priorities.
$19 USD in 40 days
6.6
6.6

With over 10 years of successful experience in full stack development, my skills align closely with the Headless Shopify Full Stack Developer role you need to fill. Not only am I well-versed in integrating multiple systems and APIs but I'm also very familiar with modern headless architecture, making me the perfect fit for your project. Having worked intensively with Hydrogen and Remix, along with my ability to move seamlessly between frontend and backend development, I can ensure a high-performance and conversion-driven storefront. In such a senior position as this one, it's important that the developer is seasoned enough to make sound architectural decisions while being agile in approach. My extensive experience not only allows me that flexibility but also gives confidence in my troubleshooting skills and ability to collaborate on all levels. All-in-all, You can expect both the precision of quality work along with successful end-results from my contributions. Plus, working with me doesn't just end at project delivery; I believe in providing a long-term partnership with continuous support and enhancement for your business. I understand the importance of a reliable developer who turns your vision into reality while ensuring security, scalability, and results; qualities that I am confident I possess. Choose me for excellence across the stack!
$8 USD in 40 days
6.5
6.5

League City, United States
Member since Mar 11, 2026
$30-250 USD
$30-250 USD
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₹12500-37500 INR
$250-750 USD
₹1500-12500 INR
$1500-3000 USD
₹1500-12500 INR
$30-250 USD
₹12500-37500 INR
$2-8 USD / hour
€30-250 EUR
$250-750 USD
$1500-3000 USD
₹600-1500 INR
₹600-1500 INR
$10-30 USD
$30-250 SGD
₹12500-37500 INR
$250-750 USD
£250-750 GBP
₹1500-12500 INR