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JOB POSTING: Senior Mobile App Developer / Full‑Stack Team Needed for AI‑Powered Grading & Marketplace App Position: Senior Mobile App Developer (iOS + Android) or Full Development Team Project Type: Full Build (Front‑End, Back‑End, AI Integration, Marketplace, Payments) Location: Remote Compensation: Competitive — based on experience and scope Start Date: Immediate --- ABOUT THE PROJECT I am building a premium, next‑generation mobile application called ART OG Official Grading — a futuristic, AI‑powered platform that gives power back to collectors by allowing them to: • Grade trading cards using AI • Build a digital inventory • Track collection value daily (like a stock portfolio) • Share their cards socially • Buy and sell through a built‑in marketplace • Order physical slabs with printed labels The app will be clean, modern, bold, and visually premium, using my brand identity and the futuristic grading visuals I provide. This is a full‑scale build, not an MVP. I am looking for a developer or team capable of delivering a polished, production‑ready app with advanced features. --- WHAT YOU WILL BUILD 1. Mobile App (iOS + Android) A complete, high‑end mobile application with: • AI‑powered card grading • Digital slab generation • Inventory management • Marketplace (buy/sell) • Daily valuation engine • Social sharing • Physical slab ordering • Real‑time updates • Advanced device features (camera, sensors, etc.) --- 2. AI GRADING ENGINE (Image Analysis) You will build or integrate: • Image preprocessing pipeline • Multi‑angle card analysis • Surface defect detection • Corner/edge analysis • Centering measurement • Authenticity checks • Subgrade calculation • Confidence scoring • Digital slab label generation Experience with computer vision, CNNs, transformers, or similar models is required. --- 3. MARKET DATA ENGINE (Daily Updates) You will build an AI‑powered valuation system that: • Scrapes or aggregates public sales data • Analyzes comparable sales • Adjusts for grade differences • Detects trends • Updates values daily • Feeds into a portfolio graph This is similar to a stock portfolio tracker, but for trading cards. --- 4. MARKETPLACE SYSTEM You will build: • Listing creation • Search + filters • Buyer/seller flows • In‑app payments • Transaction history • Seller dashboard • Order management Experience with Stripe, PayPal, or similar payment APIs is required. --- 5. SELF‑ENCAPSULATION ORDER SYSTEM You will build: • Order form • Shipping address management • Payment processing • Order tracking • Admin dashboard for fulfillment --- 6. BACKEND ARCHITECTURE You will design and build: • User accounts + authentication • Database for cards, grades, values, orders, listings • API endpoints • AI processing pipeline • Marketplace engine • Notification system • Admin tools • Secure storage for images and certificates Preferred stack: • Node.js / Python • PostgreSQL / MongoDB • AWS / Google Cloud / Azure • Firebase for auth (optional) --- 7. FRONT‑END DEVELOPMENT You will build a high‑fidelity, premium UI based on: • Clean, modern, bold design • Dark theme with metallic green accents • Holographic animations • Smooth transitions • High‑end visual polish Preferred frameworks: • React Native (preferred) • Flutter (acceptable) • Native iOS/Android (if team is large enough) --- 8. REQUIRED SKILLS MUST HAVE • 5+ years mobile development experience • Strong portfolio of polished apps • Experience with AI/ML integration • Experience with image analysis or computer vision • Experience building marketplaces • Experience with payment systems • Experience with real‑time or daily data updates • Strong backend architecture skills • Strong UI/UX implementation skills • Ability to deliver a full production build BONUS SKILLS • Experience with trading card apps • Experience with valuation engines • Experience with e‑commerce platforms • Experience with admin dashboards • Experience with AWS AI/ML tools --- 9. WHAT I WILL PROVIDE • Full product blueprint • High‑fidelity wireframes • Brand assets (logo, colors, style) • Visual references (grading animations, slab designs) • Feature list + user flows • API requirements • Ongoing feedback and direction --- 10. EXPECTATIONS Deliverables • Full iOS + Android app • Backend + database • AI grading engine • Valuation engine • Marketplace system • Payment integration • Order management • Admin dashboard • Full UI/UX implementation • Testing + QA • Deployment to App Store + Google Play Communication • Weekly progress updates • Milestone‑based delivery • Clear timelines • Ability to collaborate and iterate Quality This is a premium app. I expect: • Smooth animations • Clean UI • Fast performance • Accurate AI grading • Secure backend • Professional polish
Project ID: 40424527
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227 freelancers are bidding on average $1,153 USD for this job

Hi there, I’m Muhammad Awais and I scope this as a complete, production-ready build for ART OG Official Grading. Your vision of an AI-powered, premium grading, inventory, marketplace, and social platform is bold and feasible with a clean, modern stack. My approach is to deliver a polished iOS + Android app, backed by a robust backend, AI grading and valuation engines, and a seamless marketplace with secure payments. I’ll start with a detailed blueprint and high-fidelity UI aligned to your brand, then implement a modular backend (Node/Python, Postgres/MongoDB) and an AI pipeline for image analysis, surface checks, subgrades, and confidence scoring. The daily valuation will feed a portfolio graph and real-time updates. I’ll build a scalable marketplace with listings, filters, in-app payments, order tracking, and seller dashboards, plus a self-contained order system and admin tools. The result will be smooth animations, fast performance, and secure, production-grade code. What is your primary timeline and any non-negotiable must-have features for the first production release? Key questions I’d address early in the project: What is the target launch date and current design handoff status? Which AI framework and hardware targets do you prefer for on-device grading vs cloud processing? Do you want continuous real-time valuation or batch daily updates with push notifications? What payment flows and geographic support should we prioritize first? How should card authenticity ch
$1,500 USD in 18 days
9.2
9.2

With over a decade of experience in AI/ML integration and high-scale systems, I understand your project goal of developing the AI-Based Trading Card Grading App. The futuristic, AI-powered platform you aim to create aligns perfectly with my background in developing premium, high-security systems for scaling apps with over 1 million users. For strategic insight, ensuring scalability and security from the initial design phase is crucial. My past success includes building Telegram Mini Apps that catered to over 1 million users, showcasing my ability to handle complex projects like yours. I encourage you to take action and reach out to discuss the roadmap for your AI-Based Trading Card Grading App. Let's collaborate to bring your vision to life with a polished, production-ready app that exceeds expectations.
$1,200 USD in 20 days
8.3
8.3

AI + MOBILE + MARKETPLACE EXPERTISE UNDER ONE ROOF — READY TO BUILD A PREMIUM, PRODUCTION-GRADE PLATFORM. With 12+ years in full-stack, AI, and mobile development, we have delivered scalable apps including AI-powered marketplaces, fintech systems, SaaS platforms, and real-time mobile applications. Your ART OG vision aligns perfectly with our expertise in React Native, Node.js/Python, AWS, Computer Vision, and secure payment ecosystems. We understand the complete workflow: AI card grading via image analysis, digital slab generation, valuation engine with market-data aggregation, marketplace buy/sell flow, inventory tracking, physical slab ordering, admin dashboard, and real-time portfolio analytics. Core modules: ✔ AI grading & authenticity checks ✔ Marketplace with seller dashboard ✔ Portfolio valuation tracking ✔ Inventory & digital slabs ✔ Secure payments & order system ✔ Admin panel & analytics ✔ Smooth premium UI with modern animations We focus on scalable architecture, optimized APIs, clean UI/UX, security, and long-term maintainability. We can also assist with deployment, App Store/Play Store launch, testing, and post-launch support. Ready to discuss milestones, timeline, and technical execution in detail.
$500 USD in 16 days
8.4
8.4

⭐⭐⭐⭐⭐ Build Your AI-Powered Grading & Marketplace App with Expert Developers ❇️ 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 Mobile App Developer or a Full Development Team. 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 mobile app development. We will create a polished, production-ready app that meets all your advanced features, including AI integration and marketplace capabilities. ➡️ Why Me? I can easily build your AI-powered grading app with my 5 years of experience in mobile development, specializing in iOS and Android platforms. My expertise includes AI integration, image analysis, and marketplace creation. Additionally, I have a strong grip on backend architecture and real-time data updates. ➡️ 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: ✅ Mobile App Development ✅ AI Integration ✅ Image Analysis ✅ Marketplace Development ✅ Payment Systems ✅ Backend Architecture ✅ UI/UX Design ✅ Database Management ✅ Node.js / Python ✅ PostgreSQL / MongoDB ✅ Real-Time Data Updates ✅ API Development Waiting for your response! Best Regards, Zohaib
$460 USD in 2 days
7.9
7.9

Hi, I can build your AI powered grading and marketplace app as a full scale production system with clean architecture, smooth performance, and a premium mobile experience for both iOS and Android. I will develop a complete mobile app using React Native or Flutter with features like AI based card grading, digital slab generation, inventory tracking, marketplace buy and sell system, daily valuation charts, and real time updates with a modern dark themed UI and premium animations. I will build a strong backend using Node.js or Python with PostgreSQL to handle user accounts, marketplace listings, orders, payments, notifications, and a secure AI processing pipeline for image based grading and data storage. I will also integrate computer vision based grading logic for card analysis including edge, corner, centering, and surface detection along with a valuation engine that updates prices daily using market data and feeds portfolio style graphs inside the app. Please check out my profile to review my past projects and portfolio. https://www.freelancer.com/u/Hammadhassan21 I am available to start immediately. Ping me on chat to discuss all the things in detail and move forward Thanks.
$850 USD in 15 days
7.2
7.2

Hi I can help build ART OG Official Grading as a full production-ready mobile platform with AI grading, inventory tracking, marketplace, payments, valuation engine, slab ordering, backend, and admin tools. The main technical challenge is combining computer vision grading, market-value intelligence, secure payments, user inventory, real-time updates, and marketplace workflows into one fast and polished mobile experience. I can develop the app with React Native, backend APIs using Node.js/Python, PostgreSQL or MongoDB, secure cloud storage, authentication, image upload pipelines, AI grading services, and admin dashboards. For the AI layer, I can structure preprocessing, card image analysis, defect detection, centering checks, subgrade scoring, confidence scoring, and digital slab label generation. For marketplace and valuation, I can build listing flows, buyer/seller dashboards, payment integration, order tracking, comparable-sales data processing, and portfolio-style value charts. The final system can be designed with scalable backend architecture, secure image/certificate handling, premium UI animations, and clean deployment support for App Store and Google Play. Thanks, Hercules
$850 USD in 7 days
6.9
6.9

Hi, I’m a senior full-stack/mobile developer with 7+ years of experience building premium AI-powered apps, marketplaces, and scalable backend systems. I can deliver your complete React Native app, AI grading engine, valuation system, marketplace, payments, admin dashboard, and cloud infrastructure with clean architecture and production-ready quality. Strong experience with computer vision, Stripe/PayPal, AWS/Firebase, Node.js/Python, PostgreSQL/MongoDB, and high-end UI/UX animations. I provide clear communication, weekly progress updates, work in your timezone, and always focus on meeting deadlines with long-term support. Confident I can bring ART OG Official Grading to life exactly as envisioned. Budget is reasonable and negotiable. Looking forward to building a long-term working relationship with you.
$850 USD in 7 days
7.0
7.0

FUTURISTIC AI GRADING & MARKETPLACE: ARCHITECTING THE ART OG ECOSYSTEM HI, For a premium build of this magnitude, we will implement a high performance React Native frontend paired with a robust Python/Node.js backend. At Plan D Studios, we bring 12+ years of experience in Mobile App Development and Custom Software, specializing in Image Analysis and complex SaaS architectures. Technical Execution Strategy: AI Grading Engine: Building a custom computer vision pipeline for corner/edge analysis and centering measurements, using high resolution image preprocessing to ensure grading accuracy. Valuation Engine: Developing an AI driven scraper and data aggregator to provide real time portfolio updates, mimicking stock market precision for card values. Marketplace & Payments: A secure, Stripe integrated marketplace with a dual role dashboard for buyers/sellers and physical slab order fulfillment. UI/UX Polish: Implementing your dark theme metallic aesthetic with hardware-accelerated holographic animations for a truly futuristic "Digital Slab" experience. Everything is developed in house to ensure the high end visual polish and secure Backend Development required for a production ready launch. Since accuracy is key for grading, will we be training the model on a specific card category first (e.g., Pokémon, TCG, Sports) to refine the surface defect detection? Regards, Haider
$1,200 USD in 5 days
7.2
7.2

Hi I see you're looking to build an advanced AI-based trading card grading app called ART OG Official Grading. You want features like AI-powered grading, a digital inventory, and a marketplace for buying and selling cards. It sounds like a comprehensive project that needs a solid technical foundation, especially with the AI integration and real-time data updates. With over 8 years of experience in mobile app development and a strong background in React Native and Python, I can help you create a polished and user-friendly app. I also have experience with payment systems like Stripe and can build the backend architecture you need for secure user accounts and transactions. Let’s chat to discuss your vision in more detail and how I can support you in bringing this project to life. Thanks, Waleed
$1,799 USD in 30 days
7.1
7.1

Hello, I trust you're doing well. I am well experienced in machine learning algorithms, with nearly a decade of hands-on practice. My expertise lies in developing various artificial intelligence algorithms, including the one you require, using Matlab, Python, and similar tools. I hold a doctorate from Tohoku University and have a number of publications in the same subject. My portfolio, which showcases my past work, is available for your review. Your project piqued my interest, and I would be delighted to be part of it. Let's connect to discuss in detail. Warm regards. please check my portfolio link: https://www.freelancer.com/u/sajjadtaghvaeifr
$1,850 USD in 7 days
7.2
7.2

Hi there, I reviewed your AI-powered grading app and it's exactly the kind of project we handle well. The ML-based card evaluation combined with marketplace functionality is a solid technical challenge — we've built similar computer vision systems before. I have a couple of quick questions about your vision here, and I'd love to chat through the scope. Are you leaning React Native or Flutter for cross-platform, and do you have ML models ready or building from scratch? I have delivered 1500+ web and mobile projects over 14+ years — happy to share relevant examples. Thanks, Hasan
$200 USD in 28 days
6.7
6.7

Hello, Your ART OG Official Grading platform is a very exciting concept combining AI grading, marketplace features, portfolio tracking, and premium mobile UX into one ecosystem. I have experience with React Native, Node.js/Python, PostgreSQL, payment integrations, real-time systems, and AI-powered applications. I can help build the complete platform including: • AI grading engine with image analysis • Marketplace + payment workflows • Inventory and valuation tracking • Secure backend APIs and admin dashboard • Premium animated UI/UX for iOS & Android For AI workflows, I’ve worked with image-processing pipelines, API integrations, and scalable backend architectures designed for production-ready apps. I can structure development into milestones with regular updates, testing, optimization, and final App Store/Google Play deployment. I’d be happy to discuss the architecture, timeline, and recommended tech stack for your platform. Best regards
$900 USD in 7 days
6.9
6.9

Hi, We have experience building AI-powered mobile platforms and this project is a strong fit for our team. ART OG Official Grading is a large-scale production app combining computer vision, marketplace systems, portfolio tracking, and premium mobile UX into one ecosystem. We can handle the full build including: iOS + Android app development AI grading/image analysis pipeline Marketplace + payment systems Portfolio valuation engine Backend architecture + admin dashboard Real-time updates and cloud infrastructure Suggested stack React Native (mobile) Node.js + Python (backend + AI services) PostgreSQL / MongoDB AWS or Google Cloud Stripe/PayPal integrations Computer vision models for grading analysis Key systems AI card grading + defect detection Digital inventory + slab generation Marketplace with buyer/seller flows Daily card valuation tracking Physical slab ordering workflow Secure image processing/storage Estimated timeline ~5–8 months depending on final AI grading scope and marketplace complexity. This is enterprise-level scope with AI, marketplace, mobile, backend, payments, and valuation infrastructure combined into one platform. We focus on delivering polished, scalable production apps with long-term maintainability and premium UX quality. Regards Interconnect Team
$850 USD in 7 days
6.8
6.8

Hello, I have 4 years of experience in Mobile App Development, Backend Development, and AI Integration. I have thoroughly reviewed your project requirements for the development of the AI-Based Trading Card Grading App. I am confident in delivering a polished, production-ready app with advanced features as per your detailed job description. I understand the need for an AI-powered grading engine, digital slab generation, inventory management, marketplace integration, daily valuation engine, social sharing capabilities, and more. My expertise in Python, Mobile App Development, AI Development, and Backend Development aligns well with the project requirements. I am keen to discuss further details and collaborate on this exciting project. Please feel free to connect in chat for a detailed discussion. Best regards, Taimoor from Pixels Soft Let's connect in chat for further discussion.
$850 USD in 7 days
6.4
6.4

Hi, I have carefully reviewed your project and understand that you are building a premium AI powered trading card ecosystem that combines grading, portfolio tracking, marketplace functionality, valuation intelligence, and physical slab ordering into one polished production ready platform. For your platform, I would build a scalable backend infrastructure for card data, grading records, marketplace listings, valuations, and order management while also developing a premium mobile application with modern animations, smooth transitions, and real time functionality. The AI grading engine would be designed with image preprocessing, defect detection, centering analysis, and scoring pipelines to generate structured grading outputs and digital slab visuals. My approach is to first establish the backend architecture and AI processing pipeline, then build the mobile application and marketplace systems on top of it, followed by valuation engine integration, payment workflows, and final UI polishing to ensure the app feels premium and production ready across both iOS and Android. After development, I can also provide ongoing maintenance, optimization, feature expansion, and deployment support to help scale the platform as your user base grows. If you find my offer satisfactory, we will be happy to discuss your project in detail. I'm waiting for any kind of response. Thanks.
$850 USD in 7 days
6.4
6.4

Hi, I’ll be upfront this is a large scale product, not a single phase build. A full AI grading engine, marketplace, valuation system, and mobile apps require a staged rollout to ensure quality and accuracy, especially for the AI components. I can lead this end to end with a clear execution plan. Hi, I can design and build your ART OG platform with a strong focus on performance, scalability, and premium user experience. I’ve worked on systems combining mobile apps, backend infrastructure, and data driven features, and I understand the complexity of blending AI, marketplaces, and real time valuation into one product. My approach is to break this into phases. Phase 1 focuses on core app features, backend architecture, and a functional grading pipeline using proven computer vision models. Phase 2 expands into marketplace, payments, and valuation engine. Advanced AI refinement and accuracy improvements follow with real data. I recommend React Native for cross platform apps, Node or Python backend, and cloud infrastructure on AWS or GCP with scalable storage and processing pipelines. The UI will match your premium vision with smooth animations and clean interactions. I focus on building production ready systems, not prototypes, with long term scalability in mind. Best, Justin
$850 USD in 7 days
6.2
6.2

Hello, I am excited about the opportunity to develop your AI-Based Trading Card Grading App. With extensive experience in mobile app development using React Native and Flutter, I can create a user-friendly and efficient application. Additionally, my background in Python and machine learning will ensure that the grading and image analysis features are robust and accurate. I understand the importance of integrating a seamless payment processing system and developing a reliable backend to support your app’s needs. To better understand your project, I have a few questions: Q1: What specific grading criteria do you want the AI to focus on for the trading cards? Q2: Are there any specific payment gateways you prefer for the app? Q3: What platforms do you want the app to be available on (iOS, Android, or both)? I look forward to discussing your project further. Best regards.
$1,200 USD in 10 days
6.6
6.6

Hello There!!! ★★★★ ( Build a premium AI-powered trading card grading, valuation & marketplace ecosystem with scalable backend and polished mobile UX ) ★★★★ I’ve carefully read your vision for ART OG Official Grading, and this is clearly more than just an app — it’s a complete collector ecosystem with AI grading, real-time valuation tracking, marketplace features, and physical slab ordering. I really like the futuristic premium direction you want. ⚜ AI-powered card grading & image analysis ⚜ React Native / Flutter app development ⚜ Marketplace & payment integration ⚜ Portfolio valuation engine ⚜ Backend APIs & cloud architecture ⚜ Admin dashboard & order tracking ⚜ Smooth premium UI/UX animations I’ve 6+ years experiance building scalable mobile apps with Python, Node.js, React Native, ML integrations, Stripe APIs, and cloud deployment. I’d approach this with modular backend architecture, CV-based grading pipelines, secure storage, and optimized realtime updates for performance. I also focus heavily on clean animations and polished UI details because premium feel matter alot here. Would love to discuss your wireframes and project roadmap further. Warm Regards, Farhin B.
$256 USD in 10 days
6.6
6.6

Hi I have read your requirements. May I know do you have any specific strict timeline? 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 , java spring boot and php CodeIgniter mvc. Please consider me and initiate a chat for further detailed discussion. Regards, Anju
$850 USD in 30 days
6.5
6.5

Hi, I have gone through your project description and understand you’re building a full AI-powered mobile platform for trading card grading, marketplace, valuation engine, and order system with a production-ready architecture. I have experience with React Native, Node.js/Python backends, REST APIs, and AI integrations using computer vision models (CNN-based pipelines, image preprocessing, feature detection). I’ve also worked on marketplace systems, payment integrations (Stripe APIs), and scalable backend architectures with real-time data handling. For this project, I would design a modular system covering AI grading (image analysis pipeline with confidence scoring), marketplace engine, valuation system with daily data updates, and a secure backend for users, listings, and orders. The mobile app would be built in React Native with a clean, high-performance UI and smooth UX flow. I can contribute to both AI + full-stack architecture and deliver a production-ready system with scalable structure. Best regards, Juan
$850 USD in 7 days
5.8
5.8

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