50k Marketplace Portal & App

@gutibs

Hi! This is something we can handle without hesitation — and the deliverables list is clear enough that most of the scope is already well defined from our end. Before I can put a firm proposal together, the one thing that shifts the work most is the payment flow. The PDF you mentioned isn't accessible from here, so I'd want you to confirm: does money change hands on the platform — seller payouts, escrow, transaction fees — or is this a listing/lead-gen model where buyers and sellers close deals off-platform? That single detail changes the order-flow and backend complexity considerably. On how we'd build it: PHP with a REST API and MySQL covers the portal and shared schema cleanly. The three-role structure with separate dashboards and permission control is well-defined territory for us. For the Android app, we'd propose Flutter over native Java/Kotlin — it compiles to a real APK, delivers a fully native feel, and keeps business logic aligned with the web layer without duplicating core rules, which matters when listings, profiles, and order status need to stay in sync across both surfaces. Push notifications, real-time updates, and user profiles fit naturally into that stack. SQL schema, seed scripts, setup guide, and walkthrough video are standard deliverables on our end; source code ships deploy-ready. Confirm the payment model — or paste the relevant section from the PDF — and we can lock the scope from there. Gustavo & the DoTheCode team

@ozbas

As an esteemed Full-Stack software engineer with over 10 years of experience, I am confident in my abilities to build and deliver the exact solution you require for your robust marketplace. My skills include profound expertise with not only PHP, MySQL, Java, and Kotlin but also a vast array of in-demand technologies such as React Native, Firebase/FCM, and Google Map APIs that will play a pivotal role in developing an integrated system as desired. Also, being well-versed in payment gateway APIs like PayPal and Stripe assures me of my ability to handle any intricate needs that arise. Though my profile speaks volumes about my capability, what truly sets me apart is my dedication and communication. Your project will receive undivided attention resulting in well-developed source code with meticulous backend development, frontend development and thorough documentation that eases your installation process. Moreover, I'll ensure daily communication about the project progression along with free technical support even after the project completion. I eagerly await the opportunity to serve you and guarantee a seamless installation of your portal on your server while publishing the fully functional APK to a test device all within your specified timeline.

@AnumFatima210

Hi, I went through your project details and understand what you're looking to achieve. I'd be interested in working with you on this. Based on the requirements you've shared, I can handle the project from start to completion while keeping the work aligned with your expectations, timeline, and desired outcome. My approach is straightforward: first, I'll make sure the requirements and expected deliverables are clear. Then I'll complete the work in structured stages, share progress along the way, incorporate your feedback, and deliver the final work after everything has been reviewed. Before we begin, I have a couple of questions about your requirements that will help me understand the scope more accurately. Feel free to message me so we can discuss the details and determine the best way to move forward. Best regards, Anum

@crtvecode

You're looking for a complete marketplace solution with a PHP web portal and a native Android app. I see the need for a shared MySQL database to keep everything in sync, which is important for managing the Admin, Seller, and Buyer roles effectively, and those roles have their own specific needs. I’ll build the portal with a clean UI for listing management, and I’ll make sure the Android app mirrors the buyer experience with real-time push notifications. So, I can complete the work first, so you can test everything before making any payment. You’ll only create a milestone once you’re satisfied with the results, which is important to keep everything running smoothly. This way, you can be sure everything works as expected. I'm ready to start immediately for $329, let’s get this done! Rajavel - PHP, MySQL, and Android Development Expert.

@sufyanasmat38

Hi, I have experience building marketplace platforms with PHP, MySQL, REST APIs and native Android applications. I can develop the Admin, Seller and Buyer portals with proper role based permissions, listings, orders, profiles, reports and a shared MySQL database. For Android, I can use Kotlin with Firebase push notifications for real time order, message and system updates. I’ll provide complete source code, SQL schema, setup documentation and walkthrough video, and I can also share relevant marketplace and Android app work links.

@vishal1145

Your MySQL schema will become a bottleneck once you hit 10,000+ concurrent listings if you don't partition tables by seller_id and implement proper indexing on search queries. Without a caching layer between PHP and the database, every listing page load will hammer MySQL directly. Quick questions - are you planning Redis or Memcached for session management and API response caching? And what's your expected transaction volume per hour so I can size the connection pooling correctly? Here's the architectural approach: - PHP BACKEND: Build RESTful API with role-based JWT authentication, separate controllers for Admin/Seller/Buyer workflows, and implement database transactions to prevent inventory race conditions during checkout. - MYSQL OPTIMIZATION: Design normalized schema with foreign key constraints, create composite indexes on listing searches, and write stored procedures for complex reporting queries that admins will run frequently. - ANDROID NATIVE: Develop in Kotlin with MVVM architecture, integrate Firebase Cloud Messaging for real-time push notifications, and implement offline-first data sync so buyers can browse cached listings without network. I've built 4 marketplace platforms that scaled from MVP to 50K+ active users without database rewrites. Let's schedule a 20-minute technical call to review your PDF spec and align on the API contract before development starts.

@ciss26

Hi, I’d love to help you develop your 50k Marketplace Portal & Native Android App with a reliable, scalable architecture using PHP, MySQL, and Java/Kotlin. We have experience building marketplace platforms, e-commerce systems, REST APIs, admin dashboards, and Android applications with synchronized backend data. Key Features We Can Deliver Admin, Seller & Buyer role-based access Separate dashboards and permissions for each user type Listing creation, editing, browsing, search and management Product/category management Buyer profiles and seller profiles Order and transaction management Seller order management Admin reports and platform management REST API connecting web portal and Android app Shared MySQL database for real-time data synchronization Native Android application using Kotlin/Java Push notifications for orders, messages and system updates Secure authentication and API communication Responsive and user-friendly web interface Database schema, seed data and migration/setup scripts Complete source code and technical documentation Recommended Technology Stack Backend: PHP 8.x / Latest Stable PHP Framework: Laravel Database: MySQL API: Laravel REST API Web Frontend: Blade + Bootstrap/modern JavaScript or React where appropriate Android: Kotlin Notifications: Firebase Cloud Messaging (FCM) Server: Linux + Apache/Nginx Version Control: Git/GitHub

@softwarelinkerrs

With over a decade of experience in the software development industry, I am confident that my team at SoftwareLinkers will be able to successfully execute your project with precision and care. Our expertise lies directly in the skills required for this task – PHP, MySQL, Android, API Development and more. We have previously worked on similar marketplace projects where we designed large databases for such with intuitive interfaces linked to mobile applications. Our knowledge and proficiency in using PHP and MySQL ensure that we can create a seamless web portal where you can efficiently manage the distinct roles of Admin, Seller and Buyer. We’ll also develop a clean UI for adding, editing and browsing listings plus an order flow comprehensible by all three roles. The Android app we will create alongside this will echo the desktop experience. One major strength of ours is our ability to understand clients' business goals. As you mentioned, data synchronization across web and mobile platforms is vital for your project's success, and our intimate knowledge of backend/frontend development as well as database management gives us an edge in ensuring just that. We at SoftwareLinkers are not just coders - we are committed to delivering results with futuristic evolution in mind. Let's work together on this!

@XpertLabIndia

Hi, We can build your marketplace as a complete PHP + MySQL web platform with a native Kotlin Android app, keeping both connected through a secure API and shared database. What we’ll cover: • Admin, Seller & Buyer dashboards with role-based permissions • Listing, profile, order and reporting workflows • Native Android buyer app with real-time push notifications • Secure REST APIs and synchronized MySQL database • Authentication, deployment, SQL scripts and documentation • Complete source-code handover with setup/walkthrough We have experience building marketplace and e-commerce platforms and can provide relevant work links in the chat. Do you already have the UI/design finalized or should we handle the frontend design as well? Thank you Rohan

@pinkeegupta

Hi I have read your requirements and I am sure I will be able to help you. Please message me so that we will have detail technical discussion. I have 9+ years of combined experience in Mobile Application development, Website development, Desktop application development, 3rd party Artificial Intelligence api, AR/ VR, Chatbot, Blockchain- Cryptocurrency, CRM & ERP, Game Development and any other Software development. I am having expertise in Native on Android Java, kotlin and IOS Swift, and For Hybrid Cross platform on Flutter Dart & React- Native, and for web and backend on react js and node js, Python Django and php CodeIgniter mvc and Laravel. Please consider me and initiate a chat for further detailed discussion. Regards, Anju Logical Soft Tech Pvt Ltd, Indore(M.P)

@technologiesit

With my extensive experience in API Development, PHP, Java, and Mobile App Development, I'm the perfect fit for your marketplace listing project. I have successfully delivered over 200 projects in my 8+ years of experience, and I approach each one with a business-first mindset to ensure real results. My diverse skill set aligns perfectly with your requirements: from a clean UI design to efficient data management using MySQL. Moreover, your need for a shared database is already in line with my expertise as I prioritize strong database management and backend development skills. My proficiency in Laravel, React, PHP, WordPress and Shopify will give us the flexibility to make any adjustments you may need on the web portal side. In addition, my deep knowledge of Flutter for Cross-platform development and creating native Android apps will ensure smooth operation for mobile users. Lastly, you can count on my commitment to deliver quality work on-time and within budget. With my hands-on approach to project management, I will provide you a comprehensive setup guide as well as a walkthrough video demonstrating the end-to-end flow for each role. In summary, your project requirement is well within my capabilities to Meet all Your Expectations. Let's discuss how I can propel your vision further!

@arslanshahid386

Hi, I noticed you're looking for a marketplace solution with distinct roles for Admin, Seller, and Buyer, each having specific dashboards and permissions. This is crucial for maintaining a streamlined and secure environment for all users. With my expertise in PHP and MySQL, I can create a robust back-end that efficiently manages these roles and permissions. Additionally, I have experience in developing native Android apps, ensuring seamless integration with the web portal. I understand the importance of a cohesive and user-friendly interface for each role, and I am confident in delivering a solution that meets your requirements. Could you share more about any specific features or functionalities you envision for each dashboard? This will help tailor the solution precisely to your needs.

@longngoc2307

Hi, there. "50K MARKETPLACE PORTAL & ANDROID APP" - you need one PHP/MySQL marketplace where Admin, Seller, and Buyer workflows stay synchronized with the native Android app. I’d use the latest stable PHP with MySQL and build a clean REST API layer shared by the web portal and Kotlin Android app. Role-based permissions would be enforced on the backend, while listings, orders, profiles, messages, and notifications use one consistent data model. I’d also use Firebase Cloud Messaging for reliable order and message notifications. I’d deliver the SQL schema, seed data, deployment setup, source code, and end-to-end role testing so the portal and APK can be verified against the same database. Can you upload the roadmap PDF so I can align the proposal with the exact marketplace scope before you bid?

@muhammadsaad90

Hi, I understand you need a complete marketplace solution with a PHP/MySQL web portal and native Android application, supporting separate Admin, Seller, and Buyer roles with synchronized data. I can develop the web portal with secure role-based dashboards, listing management, buyer/seller workflows, orders, profiles, reports, and REST APIs, together with a native Android app in Kotlin/Java connected to the same backend. Push notifications can cover orders, messages, and important system updates. I can also review your attached PDF and existing marketplace/app references before development so the implementation matches your required workflow and UI. You can check my work here: https://www.freelancer.com/u/muhammadsaad90 I can start immediately and would be happy to connect with you to review the PDF, reference links, and discuss the development milestones. Best regards, Muhammad Saad

@Aaleen110

The real challenge here is making the three distinct roles, Admin, Seller, and Buyer, work together cleanly within the marketplace portal so that each has their own dashboard and permissions without any overlap, so I’d use a JWT authentication system to manage sessions and assign roles based on the login. For the web portal, I’d build the front-end using Vue.js, connecting to a Laravel API to handle data persistence in MySQL and manage the listing creation, editing, and browsing, also building out the order flow and reports for the admin panel. The Android app would be native Kotlin, directly consuming the same Laravel API for the buyer experience, managing user profiles and pushing notifications for new orders or messages. I would implement a queuing system for generating admin reports, rather than generating them on demand, so the admin panel remains responsive even with large datasets. This is better because it prevents the UI from freezing while complex data is processed and delivered. I have a 5.0 rating across 10 reviews on here, and Preferred Freelancer status. I’d have the basic role management and a functional listing creation page for sellers up and running within the first two days.

@mahads31

As an experienced web and mobile developer specializing in PHP and MySQL, I am confident that I can create the powerful marketplace listing solution you need. My track record speaks for itself: I've built clean, efficient, and scalable systems for a variety of industries and international clients. Providing the means to manage distinct roles such as Admin, Seller, and Buyer is a prime aspect of my expertise, ensuring seamless data syncing between platforms is maintained while delivering user-friendly interfaces tailored to their needs. But it doesn't stop there; my proficiency covers Android native code development as well. Whether it's Java or Kotlin, your app will be built to mirror the buyer experience on your web-based platform meticulously. Real-time push notifications for orders, messages, and system updates will be key features on your app’s functionality. In addition, I'll deliver a single MySQL schema that harmoniously unifies data from both the app and the website. Ultimately, what sets me apart is not just my technical abilities but also my focus on long-term business growth. I ensure 100% client satisfaction by providing comprehensive documentation as well as a walkthrough video showing the end-to-end flow for each role after deployment. Even after this project is complete, be assured that I am available for ongoing support and development. Let our technology-savvy and reliable partnership propel your business forward!

@ankits0192

Hello, the key challenge is keeping Admin, Seller and Buyer permissions consistent across the PHP portal and native Android app while both work from the same MySQL data. I’d build the backend with the latest stable PHP and MySQL, exposing a structured REST API for the Kotlin Android app. Role-based access would be enforced server-side, while listings, profiles, orders and messages use shared database states; Firebase Cloud Messaging would handle real-time order and message notifications. I’d provide SQL schema/seed scripts, deployment-ready source, Git versioning and an end-to-end setup walkthrough. I’ve shipped 8+ applications and built production API integrations and scalable SaaS systems. Can you upload the roadmap PDF so I can align the architecture and marketplace flow with your exact requirements? Looking forward to working with you.

@ffulb

The real constraint here is keeping the web portal and Android app perfectly in sync without race conditions when a buyer claims a listing or a seller updates stock. I'd build a single REST API layer in PHP that both the web front-end and the native Android app consume, so every transaction hits the same MySQL validation logic and you never get phantom orders or stale inventory showing in the app after someone already bought it on the web. I've built similar dual-interface systems before, most recently a full-stack invoicing platform with 81 tables and real-time sync across web and mobile clients using Supabase RLS. For this I'd use PHP 8.3 with prepared statements for the API, Kotlin for the Android app, and Firebase Cloud Messaging for push notifications since it's free and reliable. The admin panel would control role permissions at the database level with a roles table and middleware checks on every endpoint. I'll need SSH or FTP access to your server, the MySQL credentials, and your Google Play Console login to deploy the APK for testing. Once I can see your hosting environment I can confirm the deployment path and get the schema designed. Full source code, SQL scripts, and a

@KarthikTechCon

Hello, I’m Karthik, a seasoned developer with 15+ years of experience in PHP, MySQL, and mobile app development. I can deliver a complete marketplace solution that meets your requirements. What I Offer: 1. Web Portal: A clean, user-friendly interface for Admin, Seller, and Buyer roles with easy management of listings, orders, and reports. 2. Role Management: Secure logins and tailored capabilities for each user role, all managed through an intuitive admin panel. 3. Android App: A native application developed in Java/Kotlin, providing a seamless buyer experience, user profiles, and real-time push notifications. 4. Shared Database: A unified MySQL schema to ensure data consistency across the web portal and mobile app. Deliverables: - Complete source code for both the PHP portal and Android app. - SQL schema and seed data scripts. - Setup guide and a walkthrough video. I’ll ensure everything is ready for installation on your server and operational on test devices. Let’s discuss your vision further! Best, Karthik