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I am seeking an experienced Node.js developer to build a custom backend automation tool for an e-commerce marketplace. The system will handle two core automation components: dynamic price tracking and automated order fulfillment. Core Responsibilities: 1. Automated Repricer Engine: - Programmatically scan/parse public item catalog listings to track market price shifts. - Dynamically adjust my store's pricing based on target competitor rules (e.g., matching or undercutting). - Enforce a strict "floor price" matrix to ensure the system never updates a listing below cost. 2. Webhook Order Processing & API Fulfillment: - Securely connect to the store's REST API using Client Credentials. - Process incoming order webhooks and instantly push status updates and chat confirmations. - Interface directly with a third-party gaming platform API (specifically utilizing Roblox libraries like [login to view URL] or custom HTTP requests) to programmatically trigger in-game asset delivery to the buyer. Requirements: - Advanced Node.js (Asynchronous patterns, Axios/Fetch) - Deep understanding of REST API integration and Webhook processing - Practical experience with Roblox automation/API libraries ([login to view URL] / account session management) - Strong emphasis on security (using environment variables for keys/tokens)
Project ID: 40598241
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86 freelancers are bidding on average $42 USD for this job

Hi, I'm interested in your project "Full-Stack Node.js Developer for E-commerce Repricer and API Fulfillment Bot". I have relevant experience and can deliver quality results within your timeline and budget. I'd love to discuss the details. Please feel free to reach out.
$30 USD in 1 day
6.2
6.2

Hi, your "Full-Stack Node.js Developer for E-commerce Repricer and API Fulfillment Bot" project is right in my wheelhouse. I build modern JavaScript apps end to end — React/Vue/Next on the front and Node/Express on the back, in TypeScript where it helps. Working with javascript, node.js, backend development, automation, api integration, rest api, I focus on responsive, fast UIs, clean component structure, and reliable APIs — no page-builder shortcuts. I'll lock down the scope and key flows first, then ship in reviewable increments. Let's hop on a quick chat to align on your requirements? ⭐ 5.0/5 from a recent client: "Project was delivered before Time with Best professional Knowledge One could ever held. Thanks for the support" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
$22.50 USD in 1 day
6.5
6.5

My name is Craig and I have been working with Node.js for several years now, making me the ideal candidate for this project. I am proficient in all the necessary areas like asynchronous patterns and REST API integration. My experience ensures that I can handle the tasks of dynamic price tracking, automated order fulfillment, and webhook processing you require seamlessly. In addition to my Node.js expertise, I also work with Vue.js, C#, and PHP which might come in handy as we develop an integrated system. One aspect that sets me apart is my practical experience with Roblox automation and API libraries, including noblox.js. This will be key in enabling us to efficiently interface with the Roblox gaming platform, programmatically delivering assets to buyers. Moreover, my background in web scraping also brings an extra advantage when it comes to sorting through public item catalogs and price tracking- a key aspect of your project’s repricer engine. Last but not least, I always prioritize security using environment variables for keys and tokens. I understand that e-commerce platforms hold sensitive data, so ensuring its protection throughout the development process is one of my primary focuses. With a results-driven approach and a commitment to delivering high-quality code within stipulated deadlines, I assure you that choosing me as your Full-Stack Node.js Developer will be a decision you’re glad you made! Let's make your e-commerce marketplace even more efficient together!
$30 USD in 1 day
5.0
5.0

Developing a custom Node.js backend for dynamic repricing and automated order fulfillment, especially with third-party gaming API integration like Roblox, requires robust asynchronous patterns and secure API handling. My MERN stack experience, including the iClear Wellness healthcare platform which involved secure data processing, API integration, and user dashboards, directly aligns with your needs; see my portfolio at usmanahmed-dev.vercel.app. Could you specify the target e-commerce marketplace for the repricer engine and clarify if the Roblox API has unique authentication methods or strict rate limits beyond typical session management? I plan to develop a modular Node.js service using Axios for external APIs, implementing robust error handling, secure environment variable management for credentials, and a clear state machine for order fulfillment. I am ready to discuss this project in detail and ensure a highly efficient and secure automation solution is delivered.
$25.82 USD in 7 days
5.0
5.0

With an extensive background in web and SaaS development, I’m well-versed in the exact skills you need for your Full-Stack Node.js Developer position. Having worked on similar projects before, I know the immense potential that comes with leveraging automation, APIs, and integrations in e-commerce. My approach has always been centered around solving real-world problems effectively and ensuring reliable, long-term solutions. Not only am I experienced with REST API integrations and Webhook processes – fundamental to your project requirements - but I also have practical experience with Roblox automation/API libraries like noblox.js. This puts me in a unique position to help you seamlessly integrate and automate your platform with the robustness and security you're looking for. Additionally, my strong understanding of using environment variables for keys/tokens will further emphasize security measures while handling sensitive data. Finally, I bring to the table a deep appreciation for efficiency and scalability while building digital products. The repricing engine I will create for you will leverage asynchronous patterns, Axios/Fetch, to dynamically track market price shifts efficiently. It will never price a listing below cost by enforcing your specified "floor price" matrix.
$30 USD in 3 days
4.5
4.5

Hi, Thanks for posting "Full-Stack Node.js Developer for E-commerce Repricer and API Fulfillment Bot" — it lands right in our wheelhouse, and we'd be thrilled to bring it to life. I don’t just want to tick the boxes here; my aim is to hand you something that genuinely goes beyond what you pictured. From your brief I can see this involves node, backend — all areas we handle in-house. We specialise in JavaScript, Node.js, Backend Development, Automation, which lines up directly with what you need. How we'd approach it: - Map out the scope, pages and data models up front - Build the frontend and backend with clean, scalable code - Test across devices and browsers, then deploy - Hand over with documentation and post-launch support Expect smooth progress updates throughout, full respect for your specifications, and zero surprises along the way. I can start right away and keep you updated at every step — let’s make this a great one. Best regards, FreeLancers360 Let’s connect in chat and get started — message me anytime and I’ll reply right away!
$10 USD in 5 days
4.0
4.0

Hi, I’ve worked on similar backend automation projects where multiple APIs, real time events, and business rules needed to work together reliably. I understand the challenge here is building an automation system that reacts quickly while protecting pricing logic, API credentials, and fulfillment accuracy. My approach would be to create a structured Node.js backend with secure API integrations, webhook handling, and automated workflows. I’ll design the repricing engine with configurable rules and floor price protection, while building reliable order processing flows with proper error handling and logging. I’ll handle the backend architecture, marketplace data processing, REST API connections, webhook automation, Roblox API integration, security setup, testing, and documentation for smooth future maintenance. Best Regards, Muhammad Saad K
$10 USD in 3 days
3.9
3.9

< Hi — Abror-Yakubov here from Uzbekistan in Central Asia > A problem well understood is a problem half solved. I have experience with JavaScript, Backend Development, Web Development and Python to build backend systems with structured logic, data processing and reliable integrations. I can create automation workflows with secure backend architecture and clear business rules. There are two key steps to solve a problem Aren't there? 1. solution1 : Build the dynamic price tracking system with structured data handling, pricing rules and protection logic to keep listings aligned with your requirements. 2. solution2 : Develop the automated order fulfillment workflow with backend processing, secure data management and reliable communication between systems. Would that be ok with you? And of course don't like your thought. I think that you want clear solution, Quality results for this project and so I will work on these rule for your project, this issue will be successful. May I ask you a question that will help you with your plan? Which marketplace and store system should the repricer and fulfillment workflow connect with first? Let's discuss in more detail now. I wana meet you on chat.
$20 USD in 7 days
3.2
3.2

Hello, you need a reliable backend that combines real-time repricing with automated order fulfillment while ensuring pricing rules and API workflows remain secure. I'll build the solution in Node.js, using asynchronous processing, webhook listeners and REST API integrations to monitor market prices, apply competitor-based pricing logic, and enforce a configurable floor-price matrix so listings never fall below your minimum threshold. For fulfillment, I'll implement secure webhook processing, authenticated API communication, structured logging, retry mechanisms and status synchronization. Environment variables will be used for all credentials, and the codebase will be modular to simplify future enhancements. Where appropriate, I can integrate with supported Roblox libraries or documented HTTP APIs while keeping the automation resilient and maintainable. Before deployment, I'll thoroughly test repricing logic, webhook handling and fulfillment flows to ensure reliable end-to-end processing. Which marketplace platform is your store running on, and does the gaming platform already provide the API endpoints or libraries you plan to use? Looking forward to working with you.
$30 USD in 2 days
3.4
3.4

Hi, Thanks for sharing your project. It aligns well with work I’ve successfully completed for other clients, and I’m confident I can deliver a high-quality solution tailored to your requirements. Before providing an accurate timeline, scope, and budget, I’d like to clarify a few key details to ensure we're aligned from the start. Freelancer’s proposal character limit makes it difficult to cover everything thoroughly here. If you're available, let's connect via chat. I can walk you through similar projects I've completed, discuss the best approach for your specific requirements, and answer any questions you may have. Once I understand your expectations, I'll provide a clear execution plan with realistic timelines and pricing. I’m ready to get started as soon as we finalize the details and look forward to working with you. Best regards, Mayank Sahu
$10 USD in 5 days
3.2
3.2

Hi, I'm interested in your project "Full-Stack Node.js Developer for E-commerce Repricer and API Fulfillment Bot". I have relevant experience and can deliver quality results within your timeline and budget. I'd love to discuss the details. Please feel free to reach out.
$30 USD in 1 day
2.7
2.7

Hello, I can build your Node.js automation tool with secure API integrations, automated repricing, and order fulfillment workflows. I’ll develop a repricer engine that tracks market prices, applies competitor rules, and protects your minimum pricing limits. I’ll also handle webhook-based order processing, store API integration, automated status updates, customer notifications, and Roblox asset delivery automation using suitable APIs/libraries. My approach will focus on clean architecture, secure credential handling, error handling, and reliable automation. I have experience with Node.js, REST APIs, webhooks, and backend automation solutions. Let’s discuss your current setup and get started.
$20 USD in 5 days
2.2
2.2

Hello, I came across your project "Full-Stack Node.js Developer for E-commerce Repricer and API Fulfillment Bot" and I'm very interested in working with you. I have reviewed your requirements and fully understand the scope of the project. I specialize in JavaScript, REST API and have successfully delivered similar projects. I'm committed to providing high-quality work with clear communication, attention to detail, and on-time delivery. I keep clients updated throughout the project to ensure progress, timelines, and expectations remain aligned. I'd be happy to discuss your requirements further and I'm ready to start immediately. Looking forward to hearing from you. Best regards, Khadija Tul Kubra Full-Stack Developer
$15 USD in 1 day
2.0
2.0

Hi, I hope you're doing well. I have carefully reviewed your project, Full-Stack Node.js Developer for E-commerce Repricer and API Fulfillment Bot, and I'm confident I can deliver a high quality solution tailored to your requirements. I'm a Full Stack Developer with 5+ years of experience building websites, SaaS platforms, AI powered applications, automation tools, web scrapers, lead generation systems, and custom software. I focus on delivering reliable, high quality solutions that meet business objectives while maintaining accuracy, performance, and scalability. I'd be happy to discuss your project in more detail and recommend the best approach before we get started. I look forward to working with you. Best regards, Adnan Hussain Full Stack Developer | Technical Fixes | AI Automation | Lead Generation & Extraction Expert | Websites Dev
$10 USD in 1 day
1.2
1.2

As a seasoned full-stack developer with over four years of industry experience, I possess the essential skills crucial for this role. My deep understanding of Node.js and REST API integration, alongside my proficiency in handling webhooks and asynchronous patterns, makes me incredibly suited for implementing the core responsibilities of your project. Having worked extensively on backend automation projects, I am skilled at leveraging APIs to devise intelligent systems that are secure, efficient, and scalable. Additionally, in terms of fulfilling your e-commerce needs specifically, I am adept at processing data and programmatically automating tasks - skills that align perfectly with your project requirements. In conclusion, not only do I meet your technical requirements but I also bring a wealth of proven experience to guarantee a successful full-stack development process. References from previous satisfied clients as well as access to my work will be provided upon request. Let's get together to envision and realize the automation capabilities that will take your e-commerce business to new heights!
$10 USD in 7 days
1.4
1.4

Hello. I can build your Node.js automation backend with reliable API integrations, webhook processing, and secure automated workflows for your e-commerce marketplace. As I understand it, you need two connected automation systems: a dynamic repricing engine that monitors market changes while protecting minimum prices, and an order fulfillment workflow that processes orders, updates statuses, and communicates with external platforms through APIs. I have experience with Node.js backend development, asynchronous programming, REST APIs, webhook systems, automation workflows, and secure integration practices. I can design a maintainable solution using clean architecture, environment-based credential management, proper error handling, and detailed logging. My approach will include: 1. Building a secure Node.js backend foundation with API integrations and webhook handling. 2. Developing configurable pricing rules with floor-price protection. 3. Implementing automated order processing and external service communication. 4. Providing documentation for setup, configuration, and future maintenance. I will focus on reliability, security, and scalability so the system can handle future marketplace growth. I hope we can create a great project together.
$20 USD in 10 days
1.6
1.6

I can develop a robust Node.js backend automation tool tailored to your e-commerce repricer and API fulfillment bot needs. My experience includes building scalable automation systems and integrating complex APIs for e-commerce platforms. I focus on clean, maintainable code with efficient handling of real-time data updates and seamless API communication to ensure reliable performance under load. Quick question before I suggest an approach: Are you looking to build this from scratch or enhance an existing backend?
$20 USD in 7 days
0.0
0.0

Hello, As the founder of a B2B automation and cybersecurity agency with extensive experience in backend architecture, I approach API-driven fulfillment and dynamic repricing as strict data orchestration and security challenges. Integrating external marketplace webhooks with third-party gaming APIs requires enterprise-level technical rigor, particularly regarding token state management. Automated Repricer Engine: Rather than deploying a fragile scraper, I will engineer a resilient, asynchronous polling architecture in Node.js. This system will parse public catalog shifts while strictly adhering to external rate limits. Your target pricing logic will be programmatically bound to an immutable, fail-safe floor matrix, ensuring zero risk of margin loss due to API anomalies or competitor dumping. Webhook & Fulfillment Orchestration: Handling external session states—such as those required for automated in-game asset delivery—is a critical vulnerability if mishandled. I will architect a secure, TLS-encrypted webhook listener that strictly authenticates incoming Client Credentials before executing the payload. The delivery sequence will instantly trigger the necessary library protocols, relying strictly on environment-injected secrets to prevent token leakage and maintain absolute operational security.
$20 USD in 7 days
0.0
0.0

Hello, I'm bharghav, with 10 years of experience in JavaScript and Node.js development, particularly in building robust backend automation tools. My expertise aligns perfectly with your need for a dynamic repricer and API fulfillment bot. I've carefully reviewed your project for an e-commerce repricer and API fulfillment bot. I'll develop the automated repricer using Node.js to track market prices and dynamically adjust your store's listings while enforcing a strict "floor price." The webhook order processing and API fulfillment will securely integrate with your store's REST API and a third-party gaming platform API (like Roblox) for asset delivery.
$21 USD in 3 days
0.0
0.0

Hello, I have seen your are looking Node.js developer working in Node.js, REST API and Automation I am having 7 years of experienced as backend developer and I will work according to your features list. Please share more details of your project. Looking forward to your response Thanks
$10 USD in 1 day
0.0
0.0

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