Senior Node.js Marketplace Architect / Technical Lead

@rinsadsl

Having worked extensively with marketplaces, auctions, and high-traffic platforms, I'm confident that I can bring immense value to your project. My experience in auditing and stabilizing existing systems - while identifying architectural issues and race conditions - has allowed me to cultivate a keen eye for potential bugs and vulnerabilities. When it comes to your platform, my primary focus will be on ensuring its stability before the crucial launch. My team's technical prowess spans PHP, Node.js (including Express JS), Angular, Flutter, React, React Native, C#, VB.NET, and leading databases such as MySQL and PostgreSQL – all of which align perfectly with your project requirements. We have deep domain expertise in payment integrations (including Stripe), shipping integrations (such as Sendcloud), WebSockets (leveraged for real-time bidding), and RESTful APIs – making us an excellent fit for your tech stack. But more than just our technical expertise, we specialize in crafting future-ready systems that combine clean architecture, performance,and business impact. This means your marketplace will not only be stabilized in the short term but also designed for long-term growth and scalability. As a team committed to measurable outcomes, speed, reliability, and value creation - we'll ensure a smooth sailing production launch for you. Task us with fixing the critical bugs and reviewing the auction logic and real-time bidding system; you won't be disappointed with our work!

@AwaisChaudhry

Hi there, I understand you need a senior Node.js marketplace lead to audit and stabilize your fashion platform before launch. I will perform a full codebase audit, identify architectural issues and race conditions, fix critical bugs, and review auction logic, real-time bidding, payment flow, and order creation to ensure production stability. I will align the backend (Express, PostgreSQL, Redis) with the frontend (React), WebSockets, Stripe, and Sendcloud, and guide your team to a solid, scalable setup. I will provide a prioritized plan with concrete fixes, quick wins, and a risk-aware rollout. What are the current bottlenecks you’ve seen in the real-time bidding system, and what is your target latency under peak load? Do you have a preferred staging strategy and rollback plan for the launch window? Are there any critical data migrations or payment flow edge cases we must lock down before go-live? What level of dev-ops and monitoring support do you expect post-launch? My approach is hands-on and collaborative: start with a rapid audit, reproduce issues, map dependencies, and implement fixes with clear tests and rollback steps. I will document findings and provide performance and reliability improvements to support a smooth launch. Best regards,

@LiveExperts

Hello, With my vast experience in all areas of software development, especially in API design and backend engineering, I am confident that I can not only conduct a thorough audit of your existing marketplace platform, but also address any architectural idiosyncrasies or bugs that may arise. Throughout my career, I have built marketplaces and auction systems from scratch; the very same skills set you are looking for to fine-tune and stabilize your platform pre-launch. Moreover, I have a deep understanding of high-traffic platforms which is imperative for an application like yours handling multiple transactions at the same time. My proficiency in using Node.js (Express), PostgreSQL, Redis, and React (Vite) aligns perfectly with your tech stack requirements. Top it off with my expertise in using WebSockets for real-time bidding and Stripe for payment integrations, you have a team player who knows exactly what it takes to ensure a streamlined and secure marketplace. Lastly, but importantly, I'm highly conscious of timelines. Having worked under strict deadlines similar to this project before, I meet them each time without compromising on quality. I look forward to not only auditting and fixing any critical bugs in your platform before launch but also to further contributing value as I guide your current development team through intricate aspects. Choose me for your project today and let's work together to realize a successful and stable marketplace! Thanks!

@irsolutions

With over 10 years of experience in web and mobile development, specializing in Node.js, I understand your need for a senior Node.js Marketplace Architect/Technical Lead to audit and stabilize your existing fashion marketplace platform. My expertise in Node.js, PostgreSQL, React, and WebSockets align perfectly with the requirements outlined in your job description. I have a proven track record in building marketplaces, auction systems, and high-traffic platforms, with successful projects in eCommerce and FinTech domains. I will perform a full codebase audit, identify architectural issues, and ensure marketplace stability for a seamless production launch. My past experiences in real-time bidding systems and payment integrations make me well-equipped to review and enhance your platform. I am ready to guide your existing development team, fix critical bugs, and optimize the auction logic for a successful launch. Let's collaborate to elevate your platform to its full potential. Feel free to reach out to discuss how I can contribute to your project's success.

@OutsourceMan

⭐⭐⭐⭐⭐ Conduct a comprehensive audit of the existing Node.js codebase, identifying architectural bottlenecks, race conditions, and performance issues. Analyze and optimize the auction and real-time bidding logic using WebSockets to ensure low-latency, reliable performance under high traffic. Review and stabilize payment flows and order creation, including Stripe integration, ensuring transactional consistency and error handling. Assess Redis caching strategies and PostgreSQL queries for performance improvements and scalability. Fix critical backend and frontend bugs, ensuring the marketplace and admin dashboard are production-ready. Collaborate with the current development team, providing guidance on best practices, code refactoring, and architecture improvements. Implement monitoring and alerting to maintain platform stability during launch. Leverage CnELIndia’s experience in marketplace development and Raman Ladhani’s expertise in high-traffic Node.js systems to deliver a reliable, scalable, and secure platform.

@ZohaibRoy

⭐⭐⭐⭐⭐ Senior Node.js Architect for a Stable Fashion Marketplace Launch ❇️ Hi My Friend, I hope you are doing well. I just checked all of your project requirements and I can see you are looking for a Senior Node.js Developer. You have no need to look any further as Zohaib is here to help you! My team has successfully completed over 50 similar projects for marketplace platforms. I will perform a complete codebase audit, identify issues, and fix critical bugs to ensure a smooth launch. ➡️ Why Me? I can easily handle your project as I have 5 years of experience in developing and stabilizing marketplace platforms with Node.js, PostgreSQL, and real-time bidding systems. My expertise includes backend API development, payment integrations, and performance optimization. I also have a strong grip on technologies like React and WebSockets, which are essential for your project. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. Looking forward to discussing this with you in chat. ➡️ Skills & Experience: ✅ Node.js (Express) ✅ PostgreSQL ✅ Redis ✅ React (Vite) ✅ WebSockets ✅ Stripe Integration ✅ Sendcloud Integration ✅ Code Auditing ✅ Bug Fixing ✅ Architectural Review ✅ Marketplace Development ✅ High-Traffic Optimization Waiting for your response! Best Regards, Zohaib

@neerajdhameliya

Hello, Launching a marketplace with real-time auctions requires solid architecture, especially around bidding race conditions, payments, and order creation. I’m a senior Node.js developer experienced with Express, PostgreSQL, Redis, WebSockets, and Stripe-based platforms. I can perform a full codebase audit, review the auction and real-time bidding logic, validate payment and order flows, and fix critical issues to ensure the platform is stable for production launch. I’m also comfortable guiding your existing development team during the stabilization phase. Could you please share the repository or architecture overview and your expected launch timeline? Best, Niral

@tangramua

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 Software Architecture, Node.js, Express JS, Socket IO, PostgreSQL, Redis, Stripe, API, Backend Development, RESTful API 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.     

@AhteshamAK

Hello, I’d be glad to help stabilize and prepare your fashion marketplace for launch. With a calm and precise approach, I focus on identifying hidden architectural issues, race conditions, and real‑time bottlenecks, especially in systems involving auctions, WebSockets, and payment workflows. I’ve led multiple high‑traffic marketplace builds where transactional integrity and bidding accuracy were mission‑critical. I can audit your Node.js + PostgreSQL + Redis stack, ensure the auction engine behaves consistently under load, refine payment and order flow logic, and strengthen the platform’s reliability end‑to‑end. I also work smoothly alongside existing teams, providing technical direction without disruption. Warm regards, Ahtesham

@pvsysgroupinc

With over 16+ years of dedicated experience in the development industry, I hereby present myself as your seasoned Node.js and PostgreSQL expert to lead this project efficiently. I have specialized in creating high-performance applications using these technologies and have a comprehensive understanding of designing secure marketplaces, especially those involving auction systems. As a senior developer who has directly managed projects for more than 200 satisfied clients, I know that attention to detail is vital for the success of any platform. I fully comprehend the importance of a stable and flawless software system for this fashion marketplace - even more so ahead of its launch. My proposal entails conducting an extensive code audit to root out architectural flaws and potential race conditions while fixing critical bugs as we navigate through the project timeline. It should be mentioned that my proficiency with React (Vite) and WebSockets (real-time bidding) ensures that your platform benefits from state-of-the-art functionalities seamlessly. you can rest assured that my decisions and guidance for the existing team would be precise and unwaveringly focused on achieving project objectives. You deserve a freelancer who values prompt communication and respects deadlines, and that’s exactly what you can expect from me - 24/7 commitment towards your endeavor regardless of your timezone.

@divumanocha

Hello, Thank you so much for posting this opportunity. It sounds like a great fit, and I’d love to be part of it! I’ve worked on similar projects before, and I’m confident I can bring real value to your project. I’m passionate about what I do and always aim to deliver work that’s not only high-quality but also makes things easier and smoother for my clients. Feel free to take a quick look at my profile to see some of the work I’ve done in the past. If it feels like a good match, I’d be happy to chat further about your project and how I can help bring it to life. I’m available to get started right away and will give this project my full attention from day one. Let’s connect and see how we can make this a success together! Looking forward to hearing from you soon. With Regards!

@caciocode

Hi, I am a software engineer. I have worked on many advanced projects. I can audit and stabilize your existing marketplace platform before launch.

@seefattechnologi

YES ^^^Perfect match for the given tech stack^^Get quality work on time^^ I have extensive experience with similar PROJECT ---->>I am highly qualified to do this job with high QUALITY ----- I am a passionate MEAN/MERN/PHP /Full stack developer having rich experience with so many successful Tasks. Please ping me to get started and provide you great results. Thanks

@johnallenvillan1

Hello, your plan to stabilize a marketplace handling both auctions and standard sales is clear, especially the need to verify the real‑time bidding layer and payment flow before launch. I've led audits for two high‑traffic commerce platforms built on Node.js and PostgreSQL, including resolving a Redis pub/sub bottleneck in a live auction system and tightening order‑creation logic that previously caused duplicated Stripe charges. I see the real complexity here coming from concurrency risks in the bidding pipeline, race conditions between WebSockets, Redis, and the API layer tend to surface only under load. Ensuring atomic updates around bid placement and payment events is essential for avoiding inconsistent auction outcomes. I will map the current architecture, stress‑test the auction logic, harden Redis locking, review Express middleware, verify idempotent payment flows, and isolate any unstable components so they can be patched without disrupting your team. All findings will be delivered with actionable fixes and structured documentation. Before starting, I need clarity on your current deployment environment and whether you have load‑testing data available. Next step: I can deliver an initial audit summary within 3 days. Best regards, John allen.

@juanestebana17

Hi, With extensive experience leading Node.js marketplaces and ensuring their architectural robustness, I am well-prepared to audit and stabilize your fashion marketplace platform before launch. I will identify essential improvements, fix critical bugs, and optimize real-time bidding and payment flows to guarantee a seamless launch experience. Could you please share more details about the current codebase and specific areas where you've encountered challenges? Thanks, Juan Aponte

@royalwebraisers

Hi, As per my understanding: Senior Node.js audit/stabilization for fashion marketplace—codebase review, fix auction/real-time bidding race conditions, payment/order flows, ensure production readiness pre-launch. Implementation approach: - Full architecture audit, stress test auctions w/ WebSocket race fixes. - Secure Stripe/Sendcloud flows, PostgreSQL indexing for scale. - Critical bug patches via PRs, team guidance; launch-ready in 7 days. I will share my portfolio on your first message. Queries: Repo access? Launch date? Priority areas? Best Regards

@TechizeBuilder

Hi, I came across your project "Senior Node.js Marketplace Architect / Technical Lead" and I'm confident I can help you with it. About Me: I'm a agency owner with over 8+ years of experience in Node.js, PostgreSQL, Express JS, RESTful API, Socket IO, Stripe, API, Backend Development. , and I understand exactly what’s needed to deliver high-quality results on time. Why Choose Me? - ✅ Expertise in required Technologies and 1 year post deployment free support - ✅ On-time delivery and excellent communication - ✅ 100% satisfaction guarantee Let’s discuss your project in more detail. I’m available to start immediately and would love to hear more about your goals. Looking forward to working with you! Best regards, Deepak

@melikatfz

Hi there, Regarding your need for a Senior Node.js architect, one critical insight I bring is identifying potential race conditions within the real-time bidding using WebSockets, which many might overlook. My efficient approach ensures robust race condition management, allowing for a smooth user experience. I deliver thorough audits and optimizations tailored for high-traffic environments. In a previous project, I stabilized a high-traffic auction platform by reducing bid latency by 40% through strategic code refactoring. I provide 30 days of post-deployment bug-fixing to ensure seamless launch stability. How do you currently handle WebSocket connections for the real-time bidding system? Let's discuss further.

@KarthikTechCon

Hi, I’m **Karthik**, a **Senior Node.js Architect with 15+ years of experience** building and stabilizing **marketplaces, auction platforms, and high-traffic SaaS systems**. I’ve worked extensively with **Node.js (Express), PostgreSQL, Redis, React, WebSockets, and Stripe integrations**, which aligns well with your current stack. For your fashion marketplace launch, I can help with: • **Full backend and frontend codebase audit** to identify architectural risks • Detect and resolve **race conditions in real-time auction/bidding logic** • Review **WebSocket event handling and concurrency stability** • Audit **Stripe payment flows, order creation, and transaction handling** • Validate **Redis caching and queue logic** for performance under load • Review **Sendcloud shipping workflow and order lifecycle** • Fix critical bugs and ensure **production-ready stability** • Provide **technical guidance to your development team** if needed I’ve previously worked on **marketplace platforms with bidding systems, high-volume transactions, and real-time updates**, where stability and concurrency control were critical before launch. My focus will be on **performance, security, and reliable production deployment**, ensuring your platform launches smoothly. I’m available to start immediately and can quickly begin the **code audit and stabilization process**. Best regards, **Karthik** Senior Node.js Architect & Marketplace Specialist 15+ Years Experience