Custom Shopify Shipping App

@OutsourceMan

As one of the preeminent leaders in the web and app development scene, I believe my extensive experience fits your requirements to a tee. Over our company's 18-year journey, we've aced projects emphasizing API integrations, such as yours, and possess a unique expertise in client satisfaction- something that should resonate strongly with you! We excel at identifying the core needs of clients' apps and deliver solutions that complement their existing systems perfectly. This wealth of experience includes integrating complex shipping service APIs, writing tracking data into orders chronologically, and crafting secure OAuth flows. Moreover, our robust suite of technologies matches your explicit tech stack need: JavaScript, Node.js, PHP & React.js. Aligning with Shopify Polaris guidelines is a value we hold dear; through this approach, we ensure reduced training time for your staff using the app while providing excellent user experiences. Lastly, my dedication to clear communication ensures you'll be kept informed every step of the way with timely progress demos and discussions around key architecture decisions. If producing an app that installs seamlessly, offers top-notch performance even under high order volume conditions and adheres conscientiously to best practices is what you seek; I humbly offer you CnELIndia's solid expertise.

@smilemittal181

Hello, Building production-grade Shopify apps with carrier API integrations is exactly the kind of work I take on. I will handle the full stack — OAuth install flow, shipping service connections with live rate pulling and order timeline tracking, clean Node.js backend, and a Polaris-compliant React admin UI that your staff can use without any training. Everything will be built modular and documented so future updates are straightforward, and I will keep you in the loop with short progress demos throughout. Which shipping carriers do you need integrated? That's the key detail I need to scope this accurately. Regards, Smile Mittal

@magento2expert

Hi, This isn’t just an app build it’s about creating a reliable, scalable shipping layer inside Shopify without slowing the store or breaking workflows. That’s where most custom apps fail. I can take full ownership of this end-to-end. How I’ll approach it: * Build a custom Shopify app using Node.js + React * Clean OAuth implementation with minimal required scopes * Seamless integration with your shipping providers * Webhooks setup for real-time updates * Optimized architecture to handle high order volume without latency * Proper uninstall handling Frontend (Admin UI): * React + Shopify Polaris for a native, intuitive experience * Clean dashboard for rates, tracking, and configurations Experience: * 10+ years in Shopify development * Built and deployed Shopify apps with third-party API integrations * Strong experience with performance optimization and scalable backend systems I focus on clean, maintainable code so future updates are easy and safe. If you’re looking for a production-ready app, I’m ready to start. Thanks, Shubham K

@vipinjain1213

Hi, Shopify shipping apps have one thing that needs to work perfectly. Live rate fetching that's fast enough to show up before the customer loses patience at checkout. If rates take more than a second or two people abandon. That's the part I'd optimise first. Node.js backend, React with Polaris for the admin UI so it feels native to Shopify, OAuth install flow with clean uninstall handling, no orphaned webhooks or scripts left behind. Live rates pulled from your carrier APIs, tracking data written back into the order timeline. Built Shopify apps before so the OAuth flow and Polaris standards are familiar ground. Which shipping carriers do you need integrated?

@chandankandar007

Having accumulated over a decade of seasoned development experience in API and full-stack web applications, I am more than equipped to tackle your Shopify Shipping app requirements. My expertise spans custom PHP, Laravel, CodeIgniter (CI3 & CI4), Node.js, React.js, and proficient skills in HTML5, CSS3, and JavaScript that are all vital to Shopify App development. Notably, my prior projects comfortably establish my adaptability in dealing with external carrier APIs which is essential for your needs. Moreover, my methodical project execution philosophy aligns perfectly with Shopify's best practices. As an adherent of MVC principles, DRY code patterns and semantic naming among others,I can ensure you will have clean code that scales effortlessly even during peak order volumes. Furthermore, I prioritize thorough testing and comprehensive documentation to ensure seamless transition and maintainable code post-completion. An important note: I believe in transparent communication aligned with professional practices. As such I provide working screenshots and live videos crucial to your requirement

@monicasynthesis

Hello, I’ve gone through your job description and understand that you’re looking for a Shopify app developer to build a custom app with shipping integrations, seamless OAuth flow, and a performant, Polaris-based interface. With 5+ years of experience in Shopify app development and full-stack solutions, I’ve built scalable apps integrating external APIs and optimized for performance. What I can help you with: • Developing a custom Shopify app with secure OAuth, clean webhook handling, and smooth uninstall flow • Integrating shipping APIs for live rates and order tracking updates • Building a fast, scalable backend (Node.js) and Polaris-based React admin UI Warm regards, Monica Bhatia

@hr157

Hello, I’m excited to apply for your Shopify app development project. With 13+ years of full-stack experience, I specialize in building scalable Shopify apps using Node.js, React, and Shopify APIs, including OAuth and Polaris-based UI design. Deliverables: seamless app installation, secure OAuth flow, optimized shipping integrations with real-time rates and tracking, clean modular code, and full documentation with ongoing support. Why hire me? I bring proven expertise in production-grade Shopify apps, strong performance optimization skills, and clear communication with regular progress updates. I’d love to collaborate and build a high-performing solution for your store. Best regards

@Shonali1406

I’d love to build your custom Shopify app with seamless shipping integrations and a high-performance architecture. With 13 years of experience in full-stack development, I’ve delivered production-grade Shopify apps using Node.js and React. My deliverables include: complete app setup with secure OAuth flow, integration with shipping APIs for live rates and tracking updates, a Shopify Polaris-based admin UI, webhook management, and clean, modular, well-documented code for scalability. I will also ensure smooth install/uninstall behavior and optimal performance under load. Why hire me? I combine deep Shopify expertise with strong backend engineering to deliver reliable, scalable solutions. Let’s collaborate to build a powerful app tailored to your store’s needs.

@nadeemkhan7

Hello, I went through your project description and it seems like that I am a great fit for this job. I have an expert team with many years of experience in PHP, JavaScript, iPhone, Node.js, React.js, OAuth, Web Development, Full Stack Development, Shopify Development, API Development. Lets connect in chat so that we discuss further. Regards

@murtuza90

In the ever-evolving world of e-commerce, it's critical to have an experienced guide handling your code base - I am just that guide. With over 13 years of firsthand experience navigating complex web technologies, I have a nuanced understanding of which architectures can scale versus those that struggle under increased capacity. As someone who has successfully built and scaled high-performing applications for both startups and enterprises, I understand how to eliminate technical debt while ensuring clean, modular code. Moreover, I've developed a deep understanding of Shopify, having previously built production-grade apps in its ecosystem. Your project requires a comprehensive understanding of not only Shopify APIs and Liquid on the storefront side but also crafting a robust backend using Node.js. Thankfully, these are areas where my expertise confidently lies. I channel all my skills, including Full Stack Development, JavaScript, and Web Development, into creating powerful and intuitive applications tailored for their purpose with the dedicated assistance of agile methodologies. To complement this depth of technical knowledge is my effectiveness as a communicator. You're seeking an excellent ability to keep you updated on progress, own architecture decisions, offer advice to enhance the final product plus manage dev teams effectively.

@bhartimalu

Hello, I can develop a custom Shopify shipping app tailored to your exact requirements, including dynamic shipping rates, custom rules, and seamless checkout integration. I’ll use Shopify APIs (Carrier Service / Functions) to calculate rates based on cart value, weight, location, or any custom logic you need. I have experience building custom shipping solutions with real-time rate calculation, API integrations, and automated workflows. Shopify allows creating dynamic shipping methods via Carrier Service API where rates are returned based on cart and address data , and advanced logic can be handled using Shopify Functions for checkout customization . The app will be secure, scalable, and easy to manage from your dashboard, with fast response times during checkout. Ready to start immediately and deliver a fully working custom solution. Regards, Bharti

@shibbuquadir

Having developed custom solutions for a variety of clients, including incorporating external APIs and adhering to strict platform standards, I'm fully equipped to take on the development of your Shopify shipping app. My extensive knowledge of the Shopify API and Liquid, as well as my proficiency in Node.js, aligns perfectly with your project requirements. I can assure you that the app I build will integrate seamlessly with your existing store, connect effortlessly to various shipping services (as requested), and ensure delivery tracking information is appropriately stored in the order's timeline. Moreover, my familiarity with React and its alignment with Shopify's admin interface will result in a user-friendly, intuitive UI that requires minimal training for your staff, maintaining consistency throughout. However, what truly sets me apart is my commitment to clean, modular coding accompanied by detailed documentation which ensures both efficient response times during order volume spikes and ease of future updates. Beyond my technical qualifications, at Paper Perfect we pride ourselves on delivering exceptional results within budget and time constraints. As a freelancer who values clear communication and client involvement, I'll eagerly keep you informed through progress demos.

@Mayanks010

Hi there, You’re absolutely in the RIGHT PLACE. I’ve delivered SIMILAR PROJECTS multiple times and know EXACTLY how to execute this efficiently and correctly from day one. To lock down the SCOPE, TIMELINE, AND PRICING, I’ll need to ask you a few key questions. Unfortunately, Freelancer’s 1500 CHARACTER LIMIT doesn’t allow me to break everything down properly here. Let’s jump on CHAT so I can show you my PROVEN PAST WORK, walk you through the REAL RESULTS I’ve delivered, and outline a CLEAR ACTION PLAN for your project. You’ll immediately see why my approach is DIFFERENT and EFFECTIVE. If you’re serious about getting this done RIGHT, I’m ready to move forward. Looking forward to CONNECTING and WINNING TOGETHER. Cheers, Mayank Sahu

@sumanj555

Hello, Greetings! I’m a senior full-stack developer with 6+ years of experience in building scalable mobile and web applications. I specialize in cross-platform and native mobile development using Flutter, React Native, Swift (iOS), and Kotlin/Java (Android), along with strong backend expertise in Node.js, Django, FastAPI, and Laravel, supported by modern cloud technologies. My team and I build end-to-end mobile solutions including custom dashboards, internal tools, automation systems, role-based platforms, secure APIs, real-time features, payment integrations, push notifications, and complete app store deployments. We focus on creating smooth user experiences, clean architecture, and reliable performance. We’ve worked on numerous mobile projects with different requirements and complexities, helping clients turn their ideas into well-designed, high-performing applications. Your project aligns well with our technical skills and development approach. I’d be happy to discuss your project scope, ideas, and goals, and suggest the best technical approach. Best regards, Suman Joshi

@RostykDev

Hi, I recently developed a custom Shopify shipping app for an e-commerce brand, integrating live carrier rates and automated tracking via Node.js and React. Based on your description, I would approach this by first building the OAuth flow and webhook manager to ensure clean installs. Then, I will develop the React UI using Shopify Polaris for a native feel, while setting up the Node.js backend to fetch rates and sync tracking data. Finally, I will optimize the API endpoints to handle order spikes securely. Which shipping carriers are you integrating, and do they need multi-box rate calculations? Are you available for a quick 15-min call? please let me know.

@utsav007pandya

Excited to build your custom Shopify app—ready to start immediately! ✔️ I specialize in full-stack Shopify app development, integrating external APIs, handling OAuth flows, and delivering performant, scalable solutions. ✔️ Recently, I built a production-grade Shopify app connecting multiple carrier APIs, fetching live shipping rates, updating order tracking, and following Polaris guidelines for a seamless admin experience. ✔️ Your app will install cleanly, request only necessary permissions, maintain low response times under heavy load, and have a modular, well-documented codebase for future updates. ✔️ I’ll handle front-end Liquid/React UI, back-end Node.js (or your preferred stack), webhook management, and guide architecture decisions while keeping you updated with short progress demos. Let’s connect and create a robust, user-friendly Shopify app that integrates your shipping services flawlessly and delights both staff and customers!

@tamannarajput18

Hi, I’m Tamanna. I can develop a custom Shopify shipping app tailored to your exact business requirements. Whether you need advanced rate calculations, location-based shipping, third-party API integrations, or custom rules for weight, cart value, or product types, I’ll build a scalable and secure solution. The app will seamlessly integrate with your Shopify store, ensuring smooth checkout experience and accurate shipping costs. I’ll also provide an easy-to-manage admin interface and ensure performance optimization. From development to deployment and testing, I’ll make sure your shipping system is reliable, efficient, and fully aligned with your business needs.

@harshit805997110

Greetings, I would be glad to help you build a high-performance, custom Shopify app tailored to your shipping workflows. With solid experience in Shopify app development, I have worked on OAuth-based installations, API integrations, and scalable backends that handle real-time operations efficiently. I can deliver a full-stack solution using Shopify APIs and Liquid for storefront integration, along with a Node.js backend and a React (Polaris-based) admin interface that feels native and intuitive. I will ensure seamless integration with your shipping providers, accurate live rate fetching, and automated tracking updates directly into the order timeline. The app will be optimized for performance, follow best practices for security and webhook management, and remain clean, modular, and well-documented for future scalability. I will also keep you updated with regular progress demos and clear communication throughout the development cycle. Let us connect to discuss your shipping services and specific requirements in detail. Best Regards Jaipal

@shyamm51

As an accomplished freelance developer with substantial experience in building Shopify apps and working extensively with the Shopify API & Liquid, I am a fitting candidate for your project. Combining my skills in JavaScript, Node.js, PHP, React.js alongside my adeptness in Web Development, I can craft an app that aligns seamlessly with your existing store and optimally utilizes the Shopify functionalities you rely on.