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Title: API Development for Shopping Cart & Payment Management We are looking for an experienced backend developer to build secure and well-documented REST APIs for an eCommerce application. Project Scope: * Develop Shopping Cart APIs (Add, Update, Remove, View Cart) * Manage Product Quantities and Price Calculations * Save and Retrieve Customer Cart Data * Develop Checkout APIs * Integrate a secure payment gateway (Stripe, Razorpay, PayPal, or similar) * Store and manage payment transactions * Handle payment success, failure, and refund responses * Generate order details after successful payment * Implement JWT authentication and role-based access control * Write clean, scalable, and well-documented code * Provide API documentation (Swagger/Postman) Technical Requirements: * Node.js with Express (preferred) or Spring Boot * MongoDB or MySQL * RESTful API architecture * Secure authentication and data validation * Proper error handling and logging Deliverables: * Complete source code * API documentation * Postman collection * Database schema * Deployment assistance (optional) Please include the following in your proposal: * Your relevant API development experience * Similar eCommerce or payment projects you've completed * Estimated timeline * Fixed price or hourly rate * Technologies you recommend for this project We are looking for a developer who writes clean, maintainable code and communicates effectively throughout the project.
Project ID: 40575394
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Active 6 days ago
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Hi, I have gone through your project details and I'm confident our team can build the Shopping Cart and Payment APIs exactly as required. We are D&U Tech Solutions, a team of 4 software developers with experience in building secure and scalable backend systems for web and mobile applications. We'll develop: • Shopping Cart APIs (Add, Update, Remove & View Cart) • Checkout and Order APIs • Payment Gateway Integration (Stripe, Razorpay, PayPal, or your preferred gateway) • JWT Authentication & User Authorization • MongoDB or MySQL Database • Proper Validation, Error Handling & Logging • REST APIs with complete Postman documentation • Clean, organized, and production-ready code We write code that's easy to maintain and keep communication simple throughout the project. If any changes are needed during development, we're happy to discuss and implement them. If you're looking for a reliable team that can deliver quality work on time, we'd be glad to work on this project. Looking forward to hearing from you. D&U Tech Solutions
₹1,000 INR in 3 days
0.0
0.0
24 freelancers are bidding on average ₹1,594 INR for this job

Hello, I can help with your "eCommerce API Development & Payment Integration" project. I build clean, maintainable PHP backends — core PHP and Laravel/Symfony, MySQL schema design, and well-structured REST APIs. For work involving php, java, javascript, mysql, node.js, restful, payment gateway integration, mongodb, api development, spring boot, I pay close attention to validation, security, and readable code, delivering in small, testable milestones. You'll get clean commits and clear documentation. Could we discuss the specifics before I firm up the timeline? ⭐ 5.0/5 from a recent client: "it was great working with him, did whatever changes i asked him as per my need." Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
₹1,200 INR in 1 day
7.7
7.7

Your shopping cart and payment API project sounds like a solid scope. I've built similar backend systems before, and the part about handling payment success and failure responses cleanly is something I pay close attention to. For your tech stack, I'd go with Node.js and Express paired with MongoDB. It's well-suited for this kind of real-time cart management and scales nicely for eCommerce. I'd set up JWT authentication with clear role-based access, and document everything through Swagger so your team can hit the ground running. I will provide unlimited revisions until you're completely satisfied. Looking forward to hearing more about your specific needs.
₹8,000 INR in 4 days
7.8
7.8

With over a decade of experience in backend development and API integration, my team at SoftwareLinkers is well-equipped to handle your eCommerce project. We've successfully built and integrated RESTful APIs for various businesses, including payment gateways like Stripe and PayPal. Our expertise with Node.js and Express combined with database systems like MongoDB or MySQL ensures that we can develop secure, scalable, and well-documented APIs satisfying all your requirements. We understand the crucial role authentication plays in payment systems. Implementing JWT authentication and developing role-based access control ensures only authorized users have access to sensitive customer data. On top of that, our team gives utmost importance to proper error handling and logging to minimize any potential risks. Don't worry about the documentation aspect either - we'll provide you with comprehensive API documentation using Swagger/Postman. As an added benefit, we'll not only deliver the complete source code but also the API documentation, Postman collection, database schema and if required provide deployment assistance too. Our clients appreciate not only our technical prowess but also our dedication to effective communication throughout the project. To give you a more specific idea: depending on the complexities involved in your project we can deliver it within #{timeline} . Could we please discuss how best I can assist you in realizing your vision?
₹2,000 INR in 2 days
6.6
6.6

With over a rich JavaScript experience, I have spent significant years developing efficient and secure backend REST APIs with Node.js and utilizing MySQL - the technology you're looking for. The requirement of JWT authentication and role-based access control falls right under my expertise. I have worked extensively on similar eCommerce and payment projects in the past, which has enabled me to develop an in-depth understanding of product quantities, price calculations and even managing customer cart data. My well-documented code structure combined with proper error handling, logging as well as implementing API documentations through Postman/Swagger can ensure ease-of-use even after project completion. Coming to the elephant in the room – including payment gateways, not to worry at all! I have successfully integr-I mean 'married' businesses with popular payment systems like Stripe, PayPal, etc. This same expertise transpires into settling payment success responses or handling failures/refunds impeccably. Furthermore, in terms of deploying your project-efficiently, MongoDB And mySQL would be my suggested databases considering their performance track-records in parallel with your requirements. To conclude, I am not only guaranteeing a scalable, clean codebase with detailed documentation but also complete visibility throughout the development process.
₹600 INR in 7 days
6.2
6.2

Hello, I'll develop a robust eCommerce API using PHP, Java, and JavaScript, leveraging 10 years of experience. My approach includes scalable architecture, RESTful APIs, and optimized MySQL queries. I'll integrate payment gateways using industry best practices. Best regards, Praveen Kumar
₹666 INR in 7 days
4.7
4.7

With over X years of experience in API development, I am confident that I am the robust choice for your eCommerce API project. Throughout my career, I have honed my skills in JavaScript, PHP, and Node.js making them a perfect repertoire for this task. My familiarity with both MongoDB and MySQL allows me to choose the most suitable database according to the specific needs of your project. I have previously executed similar eCommerce projects, some of which included payment gateways integration like Stripe and PayPal. This grants me an insightful understanding of the challenges inherent in these integrations; which consequently forges my competence to overcome those challenges. For convenience and efficiency, I extensively employ Swagger/Postman for API documentation just as you require. My approach to development simultaneously prioritizes functionality, security, and scalability. I ensure optimally written codes with thorough error handling and logging procedures. Clear communication is indispensable for any successful project completion; thus expect regular updates on the progress of your project along its timeline. To facilitate decision-making, I can provide you with an estimated timeline as well as an accurate fixed price or hourly rate depending on your preference. For this task, I propose leveraging Node.js with Express considering its simplicity and scalability as well as its compatibility with RESTful API architecture which is also part of the re!
₹2,050 INR in 7 days
4.7
4.7

Hi, I have experience building secure REST APIs for eCommerce applications using **Node.js, Express, MongoDB/MySQL, JWT authentication, and payment gateway integrations**. For this project, I recommend the following stack: * **Backend:** Node.js + Express * **Database:** MongoDB (or MySQL if preferred) * **Authentication:** JWT with role-based access control * **Payments:** Razorpay / Stripe / PayPal * **Documentation:** Swagger + Postman Collection **I can develop:** * Shopping Cart APIs (Add, Update, Remove, View) * Checkout and Order APIs * Secure Payment Gateway Integration * Payment Success, Failure & Refund Handling * Order Generation and Transaction Management * JWT Authentication & Role-Based Access Control * Proper Validation, Logging & Error Handling * Complete API Documentation and Deployment Support I write clean, scalable, and well-documented code that is easy to maintain and extend. I'm available to discuss the project requirements and begin immediately. Looking forward to working with you. Jay
₹1,050 INR in 7 days
3.6
3.6

As an experienced full-stack developer with over 8 years in the industry, I believe my skill set lines up perfectly with your project requirements. I have a solid understanding of building secure REST APIs and have previously integrated multiple payment gateways, including Stripe, Razorpay, and PayPal. My expertise in Node.js (with Express) or Spring Boot would make your proposed eCommerce API development and payment integration solution highly efficient and scalable. Throughout my career, I've successfully completed similar projects involving shopping carts management, product quantity calculations, cart data storage, checkout APIs, and payment transaction handling to generate order details post-payment confirmation. My experience further encompasses secure authentication (with JWT) and database proficiency using MongoDB or MySQL - keeping data integrity and security at the forefront of my solutions. But it's not just about experience; it's also about communication. I've often been commended for promptly responding to clients' queries or concerns while maintaining transparency throughout every step of the project. I guarantee clean code, comprehensive documentation, timely delivery, and post-deployment assistance if needed. Contact me for a deep dive into technical implementation of your project vision - together we can build something amazing!
₹1,500 INR in 2 days
4.7
4.7

As an accomplished backend developer with over a decade of experience, I am thrilled to offer my services for your eCommerce API Development & Payment Integration project. My speciality lies in secure and efficient RESTful API development, which perfectly aligns with your requirements for the shopping cart, payment management, user authentication, and more. I have a command over multiple technologies such as Node.js, MySQL, PHP, etc that you are looking for in this project. Talking about my relevant experience, I have successfully served numerous clients in eCommerce and payment processing domains. For instance, I developed RESTful APIs for Satocci - a prominent e-commerce platform, facilitating seamless shopping cart management and secure payment transactions. Another notable accomplishment is BookMyInfluencers where I integrated a Stripe payment gateway with well-documented APIs. These projects testify to my ability to fulfill all dimensions of your project. Being a developer who appreciates clean code and effective communication, I guarantee efficient delivery of all the deliverables mentioned in the project description. Alongside providing the source code and API documentation, I will also include a well-structured database schema and Postman collection to assure easy scalability of your app in the future.
₹1,050 INR in 7 days
1.9
1.9

Hi, the part that usually breaks these builds isn't the cart APIs, it's getting refund and payment failure states to reconcile cleanly with your order records after a webhook retry from Stripe or Razorpay. I'd structure this as: - Node.js + Express, MongoDB for cart/product schema - JWT auth with role-based access control (admin/customer) - Stripe or Razorpay integration with webhook-based status updates - Swagger + Postman collection for docs I've built REST APIs with this exact auth + payment pattern before on Django/Express stacks, including error handling and logging for failed transactions, not just happy-path checkout. Given the scope (cart, checkout, payment, JWT, docs), I'd estimate 6-8 days once gateway choice is locked. Quick question: do you want Razorpay specifically for INR settlements, or are you open to Stripe if most customers are international? Happy to start with the cart/auth APIs first so you can review before payment integration begins.
₹1,500 INR in 1 day
1.5
1.5

Hi, I'd be happy to help you develop secure, scalable, and well-documented REST APIs for your eCommerce application. I have 4+ years of experience building backend applications using ASP.NET Core, C#, SQL Server, REST APIs, JWT authentication, and role-based authorization. I've developed enterprise-grade APIs with a strong focus on clean architecture, security, performance, and maintainability. For this project, I recommend using ASP.NET Core Web API with SQL Server (or MySQL if preferred), Entity Framework Core, JWT Authentication, and Swagger/OpenAPI for API documentation. I can implement shopping cart management, checkout workflows, secure payment gateway integration (such as Stripe or PayPal), transaction management, order generation, and comprehensive error handling. The deliverables will include complete source code, API documentation (Swagger and Postman Collection), database schema, and deployment assistance if required. Estimated Timeline: 10–14 days (depending on the payment gateway and project scope). I'm available to discuss your requirements in detail and can start immediately. Best regards, Muhammad Huzaifa Software Engineer | .NET | ASP.NET Core | REST APIs | SQL Server | AI
₹1,500 INR in 21 days
1.0
1.0

Hi, I have reviewed your requirements for a pixel-perfect accounting website on Hostinger. I can precisely replicate your designed screens for both desktop and mobile layouts without any drifting. I will fully integrate the secure online PDF fill-and-sign feature, the download hub, and a seamless checkout supporting credit/debit cards and PayPal. I will also configure a clean calendar popup for your appointment scheduling with automated email confirmations. The site will be fast, fully responsive, and completely ready for launch. I look forward to working with your design files! Best regards, Lucien
₹600 INR in 5 days
0.0
0.0

Hii.(I can show you my previous work similar to this project. Check it out and you make the choice.) Having experience building secure REST APIs for eCommerce applications, I understand this project requires more than basic CRUD endpoints it needs reliable cart management, secure payments, and a scalable backend. I can build clean, production-ready APIs with proper authentication, validation, and documentation. I'll develop the shopping cart, checkout, payment gateway integration, order management, JWT authentication, and role-based access control, along with Swagger/Postman documentation, database schema, and well-structured code that's easy to maintain. My focus is on security, performance, and clear communication throughout the project, ensuring the APIs are reliable and ready for future expansion. I'd be happy to discuss the preferred payment gateway, recommend the best tech stack, and provide a realistic timeline and cost estimate.
₹1,050 INR in 7 days
0.1
0.1

✨The best solution is ✨ to build the backend with Node.js, Express, MongoDB, and JWT authentication, exposing clean REST APIs for cart management, checkout, orders, and payments, while documenting everything with Swagger and a ready-to-use Postman collection. I'll implement a modular architecture with proper validation, centralized error handling, secure RBAC, and webhook-based payment verification to ensure every transaction is reliable, scalable, and production-ready. I have extensive experience building secure eCommerce APIs with Stripe, Razorpay, JWT authentication, MongoDB/MySQL, and RESTful services. I'll develop complete Shopping Cart, Checkout, Order, and Payment APIs with accurate price calculations, inventory validation, transaction logging, refund handling, and comprehensive API documentation for seamless frontend integration. The project will include clean, maintainable code, database schema, Swagger documentation, Postman collection, and deployment assistance if needed. I'll also perform thorough API testing to ensure security, performance, and reliability before delivery. I can begin immediately and provide regular progress updates throughout the development process.
₹600 INR in 3 days
0.0
0.0

I noticed your need for secure REST APIs in eCommerce and payment management. I specialize in building clean, professional, and user-friendly APIs that seamlessly integrate payment gateways. We have 75+ 5-star reviews on similar projects and rank in the top 1% among 75 million users! My experience includes developing APIs with Node.js and Express, ensuring secure authentication and data validation. Could you share more details about your preferred payment gateway and the current tech stack in use? Regards, Hamza.
₹750 INR in 7 days
0.0
0.0

I can build secure, scalable, and well-documented REST APIs for your eCommerce application using Node.js, Express, and MongoDB. I have experience developing authentication systems, payment integrations, role-based access control, and database-driven web applications. I’ll deliver clean, maintainable code with complete API documentation, Postman collection, proper error handling, and a scalable architecture to support future growth. I’m confident I can provide a reliable backend that meets all of your project requirements.
₹6,000 INR in 7 days
0.0
0.0

Hi, As a seasoned full stack developer, I read your requirement carefully that you want o develop the ecommerce API and Payment gateway Integration services. Requirement of scope of work and your technical process. I am ready to help you to provide you the services. I can help you to create the API of your ecommerce website. I want to connect with you for the detailed discussion then Show you our previous work accordingly. Best Regards, Sajan Verma
₹1,500 INR in 7 days
0.0
0.0

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