Full-Stack Developer Needed for RFID Inventory Management Solution (Web + Windows + Android)

We are looking for an experienced full-stack developer to build an RFID-based inventory management solution consisting of three connected applications. The solution will be used to manage approximately 300 medical inventory items per client, and must integrate seamlessly through a central FTP server for data exchange (alternative: JSON). Experience with RFID technologies, barcode scanners, Android development, and database-driven applications is highly desirable. *Part 1 – Web-Based Inventory Management Application* The web application will be integrated into our existing website and must support multiple customers through user management. Main functionalities include: - Multi-user authentication and customer management - Management of approximately 300 inventory items per client - Product master data including Part Number (P/N), Barcode, Supplier info, Price, Target stock quantity - Automatic download of current inventory quantities from an FTP server - Automatic synchronization of inventory data into the application database - Calculation of replenishment quantities (Target Stock – Current Stock) - Automatic generation of purchase orders via email to the respective suppliers *Part 2 – Windows Desktop Application* A lightweight Windows application is required to assign RFID labels to products. Main functionalities include: - Reading product barcodes using a barcode scanner - Reading RFID labels - Assigning each RFID tag to a specific product - Updating the central product database on the FTP server with newly assigned RFID tag IDs *Part 3 – Android Application for Chainway C5 RFID Reader* We require an Android application running on the Chainway C5 handheld RFID reader. Main functionalities include: - Downloading the latest product database (including RFID tag assignments) from the FTP server - Scanning RFID labels using the integrated Chainway RFID reader - Matching scanned RFID tags against the locally stored database - Calculating current inventory quantities for each product - Uploading inventory quantities (approximately 300 products) back to the FTP server Technical Requirements - Strong experience with web application development - Windows desktop development - Android development - Experience integrating Chainway RFID devices (or similar RFID hardware) - Experience with barcode scanners - Database design and synchronization - Clean, maintainable, and well-documented code Deliverables - Fully functional web application - Windows desktop application - Android application for Chainway C5 - Source code - Documentation & Deployment support When applying, please include: - Examples of similar RFID, barcode, inventory, or warehouse management projects - Technologies you recommend for this project - Estimated development timeline - Estimated budget - Any experience with Chainway RFID devices or Android RFID SDKs We are looking for a long-term development partner, as additional RFID-related projects are planned after the successful completion of this first project.