Backend Architect for EG Marketplace Platform

@diektech

Hi — Elias here from Miami. I understand you're looking for a backend architect for your marketplace platform. The goal is to create a robust and efficient system that can scale with your business needs. What usually matters most here is ensuring that the backend can handle user growth and complex transactions while remaining maintainable. A common issue in systems like this is managing integrations with various APIs and ensuring that the data flow is seamless and reliable. The tricky part is usually ensuring the architecture supports future expansion without significant rewrites. My approach would involve designing a modular architecture that isolates components, making it easier to adapt and scale. I focus on using clean, efficient code and implementing thorough testing practices to ensure reliability. With previous experience working on similar marketplace platforms, I’ve dealt with the nuances of user roles, payment integrations, and performance optimization. A few questions to better understand the scope: Q1 – What specific user roles and permissions are you envisioning for the platform? Q2 – Are there any third-party services you plan to integrate? Q3 – What are your expectations for scaling in the first year? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.

@kamran2012

Hey, EG Backend — I will architect your marketplace backend in Base44, focusing on merchant onboarding workflows, split payment logic with commission handling, and invoice/factura API integration. For payment splits, I will design the commission engine as a separate service layer so you can adjust merchant fee structures without touching checkout logic — this keeps pricing flexible as you scale. Questions: 1) Which payment processor are you using for split payouts — Stripe Connect, another gateway? 2) Do you need multi-currency support for invoices? Looking forward to your response. Best regards, Kamran

@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 PHP, Website Design, Cloud Computing, MySQL, HTML, API, Backend Development, Base44 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.     

@DeveloperStation

Hi there, I’ve developed multiple marketplace platforms using Laravel and integrated payment systems like Stripe and PayPal. I understand the importance of a seamless payment experience for both merchants and customers, and I can create a robust solution that meets your needs. In addition to backend expertise, I’m also a front-end developer with 10 years of experience. This means I can handle both sides of the project, ensuring a fully integrated and optimized product. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit for your needs. I’m looking forward to hearing more about your exciting project. Best, Adil

@designysoft

Hi There, EG Backend, I'm Vijay, a seasoned Senior Software Architect and Full-Stack Developer with over two decades worth of experience in building highly scalable and secure applications, just as your project requires. Throughout my career, I have consistently delivered AI-powered backend solutions that optimize performance and improve operational efficiency - precisely what EG marketplace needs to flourish. Fortunately, my portfolio encompasses extensive experience in implementing this crucial functionality within various marketplace systems. I have also successfully executed split payment and commission logic which means navigating the payment ecosystem on EG won't be unchartered territory for me. Building an outstanding marketplace such as EG on Base44 could present diverse technical challenges, but I am more than ready to tackle them head-on. Leveraging my remarkable problem-solving skills honed throughout the years, combined with my diligent approach to producing maintainable and scalable code, I will ensure these challenges are effectively surmounted. With your goals aligning perfectly with my core expertise, choosing me guarantees a future-ready and intelligent EG Marketplace platform that can grow seamlessly with your business. Let's not miss out on the opportunity to create something meaningful together. Let's connect! Regards Vijay

@ZohaibRoy

⭐⭐⭐⭐⭐ Senior Backend Engineer for Scalable Marketplace Solutions ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and see you're looking for a Senior Backend Engineer. You don’t need to look any further; Zohaib is here to help you! My team has successfully completed 50+ similar projects for backend solutions. I will focus on creating scalable and secure backend architectures that meet your marketplace needs. ➡️ Why Me? I can easily build your marketplace platform as I have 5 years of experience in backend engineering, specializing in Base44 integrations, performance optimization, and payment flows. My expertise includes problem-solving, system design, and implementing secure payment systems. Moreover, I have a strong grip on other relevant technologies like API integration and database management. ➡️ 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: ✅ Backend Development ✅ Base44 Integration ✅ Marketplace Architecture ✅ Payment Processing ✅ API Development ✅ Performance Optimization ✅ Database Management ✅ Security Best Practices ✅ Merchant Onboarding ✅ Scalability Solutions ✅ Problem Solving ✅ System Design Waiting for your response! Best Regards, Zohaib

@dgmstudioinfo

EG Backend, I am Wilfredo Mauricio, with more than 10 years of professional experience backed by a solid education at the UTN in Argentina. As a Backend Architect, I have not only built multiple production-level applications using Base44, I have perfected my skills in marketplace payment flows and the implementation of split payments and commission logic that are crucial for EG's project. Building a scalable and secure platform is a top priority for your marketplace, and my expertise in Node.js and Python will enable me to cater to these needs effectively. Over the years, I have honed my skills in enhancing performance and ensuring scalability - both critical aspects of this project. The biggest technical challenge in crafting EG's marketplace would be designing an optimized architecture that seamlessly integrates merchant onboarding, payments, and invoice/factura APIs while maintaining high security levels. Having dealt with similar intricacies in the past successfully, I am confident in my ability to streamline operations and ensure a robust backend architecture. Trusting me with your backend architecture would not only bring aboard exquisite technical leadership but also provide you with total transparency and unwavering commitment to your long-term project prosperity. Let's combine our strengths for an excellent EG Marketplace experience!

@Guptapuru304

**EG Backend** Hello, We've reviewed your project details and are excited about the opportunity to contribute to the EG marketplace platform. We understand the need for a seasoned backend engineer to enhance your platform's scalability, security, and performance, especially within the Base44 framework. In our 8+ years of experience, we've architected similar marketplace solutions, focusing on critical aspects like merchant onboarding and payment flows. For instance, we recently completed a project that involved integrating complex payment and commission systems, ensuring robust and secure data transactions. Our expertise in AI-first product development and scalable applications, alongside our proficiency in PHP, MySQL, and API development, positions us to effectively tackle your project's challenges. We have a proven record of delivering top-rated results, as reflected in our status as the top 1% on Freelancer.com. We invite you to share more details so we can provide a tailored proposal within 24 hours. Let's create a scalable and impactful platform together. Best regards, Puru Gupta

@kishanbwts

EG Backend I’ve built and led backend development for two production Base44 applications in the past, including a custom marketplace platform focused on merchant onboarding and payment flows. Unfortunately, those projects are under NDA so I can’t share direct links, but I can describe similar work where I designed split payments and commission logic that handled multiple vendors securely and efficiently. I have implemented marketplace payment flows, including split payments where commissions are automatically calculated and disbursed. I’ve also integrated invoice APIs similar to factura, ensuring compliance with tax rules and automated invoicing for merchants. The biggest technical challenge with building EG in Base44 will likely be designing a scalable architecture that balances complex payment flows with performance and security. Base44’s strengths can be leveraged here, but ensuring smooth processing at scale while maintaining flexibility for future features will require thoughtful schema design and well-structured API layers. Would you be open to a phased rollout where we first build and test core merchant onboarding and payments before moving to advanced integrations? That approach helped my past clients reduce risks and accelerate feedback. I’m ready to dive into your current architecture and help make critical backend improvements. Let’s get started.

@temoberishvili

Hello! I see you're looking for a Backend Architect for your EG Marketplace Platform using Base44. To tackle this, I would focus on integrating PHP with MySQL for efficient data handling and building APIs to ensure smooth interactions between the frontend and backend. Given your requirements, I’d also explore how to utilize cloud computing for scalability and reliability. I'd start by setting up the database structure, then proceed to develop the core API functionalities. Q1: What specific features do you want to prioritize for the marketplace? Q2: Are there any existing systems or services that need to integrate with this new architecture? Q3: What is your preferred cloud service provider for deployment? Let’s get this project moving forward.

@FizzaNadeemK

EG Backend, you need a scalable Base44 marketplace with robust payments, merchant onboarding, and long-term architecture. I’ve built multiple production-grade Base44 applications with custom merchant flows and integrated split payments, commission logic, and invoicing APIs for data-heavy platforms. I’ll design a secure, high-performance backend with modular architecture so new features and payment flows scale without bottlenecks. What are your expected peak transaction volumes and number of concurrent merchants to plan architecture accordingly? Best Regards, Fizza Nadeem K

@techsty2014

I can help with this, We will architect your EG marketplace backend in Base44: merchant onboarding, split payment logic, and commission handling. For payment splits, we will route funds through a ledger layer that calculates commissions before disbursement. This keeps reconciliation simple and audit trails clean. A couple of quick things to confirm: 1) Which payment processor will handle the split payouts (Stripe Connect, another)? 2) Do you need the factura/invoice API to comply with a specific country tax format? The number quoted here is a starting estimate. The exact cost and timeline will be confirmed after we go through the full scope together. Looking forward to talking through the details. Faizan

@vladang

EG Backend — I’ve worked on a few Base44 production builds (3+), and I can share demos of similar marketplace-style systems. For EG, I’d start by locking the core data model in MySQL first: merchants, listings, orders, and a proper ledger so money movement is never ambiguous. Then I’d build the Base44 backend layer around clear services for onboarding, catalog, and order processing, keeping each flow idempotent from day one. Payments come next—I’ve implemented marketplace flows with split payouts and commission handling, plus invoice/factura integrations where required for compliance. After that, I’d wire in webhooks and reconciliation jobs so failed or delayed payment states don’t corrupt order truth. The hardest part in something like EG isn’t the APIs themselves, it’s keeping payment state, refunds, and merchant balances perfectly consistent under edge cases. I’d probably add a lightweight event log early to make debugging finance flows painless.

@markupdudes

Hi, EG Backend. I have carefully reviewed your need for a Senior Backend Engineer to architect and optimize the EG marketplace platform. With my solid experience in backend development and API integration, I am confident in delivering a scalable, secure, and production-ready solution tailored to your merchant onboarding and payment processing requirements. I will focus on designing robust backend architectures and ensuring seamless integration with Base44, particularly handling marketplace payment flows and commission logic efficiently. I look forward to discussing timelines and the specific challenges you foresee so we can align our approach effectively. What specific Base44 features or customizations are critical for your EG marketplace platform's success? Sincerely,

@Mahihassi

As a key member of the dynamic and multidisciplinary engineering team at MHTechFusion, I am confident in my ability to tackle the specific needs of your project. With a strong background in full-stack development, REST API design, and cloud integration, I have the skills needed to elevate EG marketplace. Additionally, our experience in building AI-powered systems and complex IoT solutions amplifies my ability to architect intricate systems while considering scalability and secure communication. On top of using Base44 for multiple production applications over the years, I’ve also implemented split payments and integrated invoice/factura APIs which are all essential for marketplace operations like EG. Building an efficient yet flexible backend is an exciting challenge and through our deep knowledge in Node.js, Docker and AWS (EC2, Lambda, S3), I am certain we can create the robust infrastructure you need. Another key aspect in developing platforms such as EG is establishing effective mechanisms for analyzing and visualizing data which aligns well with my capabilities. Hiring me means having a skilled professional who not only navigates intricacies but also ensures clean, maintainable codes by employing industry best practices, thus facilitating long-term platform architecture.

@alizain721

EG Backend — The real risk you flagged is merchant onboarding and payments: if KYC, split payouts and dispute-handling are not modeled as first-class flows in Base44 from day one, future features and merchant scale become painful and error prone. I’ve led backend architecture on two production marketplaces with that exact pain: LootEdge (multi-vendor digital goods with escrow and 70/30 splits) and PicMe (booking marketplace with escrow and staged releases). My angle is to treat merchant onboarding, payments, and ledger integrity as the spine of the platform before adding peripheral modules. Practical approach: map the core job flow (merchant onboarding → product/listing → checkout → payment orchestration → payout ledger → dispute/invoice) and deliver an MVP that contains merchant KYC, payment provider adapters, split/escrow rules, webhook reconciliation, and admin audit tools. Early priorities: (1) a clear payouts ledger and commission engine, (2) dispute/freeze logic that prevents premature payouts, and (3) onboarding that ties KYC, tax/factura data and payout accounts to merchant records. After MVP, expand into reporting, scheduling, and long-term scaling patterns (queueing, horizontal services, observability). Portfolio proof - LootEdge: built escrow with 14-day hold, 70/30 revenue split, dispute engine that freezes payouts, Stripe Connect and Coingate integration — the payment and dispute patterns map directly to EG’s needs. Answers to your questions - How many Base44 production apps have I built? None on Base44 specifically; I have built two production marketplaces with identical payment, KYC, escrow and split-payment architectures. Links and demos available on request. - Marketplace payment flows? Yes. - Split payments/commission logic? Yes (escrow, deferred payouts, revenue split). - Invoice/factura APIs? Yes — integrated invoice generation and external factura providers in prior projects. - Biggest challenge in Base44? Modeling the payment/ledger and dispute lifecycle within Base44’s primitives so payouts, refunds, and accounting remain auditable and extensible. For the MVP, do you want escrow holds or immediate split payouts, and can you grant Base44 workspace/staging or API docs so I can draft an initial architecture and a firm estimate?

@sanatariqst

Hello, EG Backend. As a seasoned backend engineer, I have crafted and successfully deployed multiple production Base44 applications over the years. Though I do not specialize in EG marketplace platform per se, my wide expertise in database management (MySQL), server-side scripting (PHP), and website design allows me to seamlessly adapt to any complex project like this. Drawing upon my experience, I have implemented various marketplace payment flows and possess deep familiarity with split payments or commission logic, as well as invoice and factura APIs needed for robust transaction management within the platform. I understand that a key challenge in building EG marketplace is designing a system with efficient merchant onboarding, secure payments, and long-term scalability. Resolving such complexities entails time-tested problem-solving skills which I have honed through my career. Allow me to leverage these skills and my innovative perspective to architect a scalable, secure and performant backend for your platform." Thanks!

@AndrewJSMAN

EG Backend I’ve architected and deployed three Base44 marketplace platforms handling 10K+ concurrent merchants with split payments, commission logic, and invoice integrations. My approach: I’ll scaffold the backend in Base44 with Laravel, wire in Stripe Connect for split payments, and integrate Mercado Libre’s invoice API for latam compliance. Validation will run through JMeter at 2x peak load, then blue-green deploy to AWS ECS with Route53 failover. Critical path: merchant onboarding via Base44’s OAuth flow—must handle failed KYC callbacks without broken sessions. I can start immediately.

@XRProConnect

Hi there, This project instantly caught my eye, so I had to reach out. I see you're looking for a Senior Backend Engineer with expertise in Base44 for building a scalable marketplace platform with a focus on merchant onboarding and payments. With a track record of helping businesses increase ROI through performance marketing and scalable development, I am confident in achieving the results you want. Feel free to request samples of successful projects I've completed. Based on what you mentioned, here is how we would approach the project: - Design a robust backend architecture for EG marketplace - Implement critical integrations within Base44 - Optimize performance and ensure scalability Rest assured, we prioritize clear communication and delivering a seamless, user-focused solution. Best Regards, XRProConnect