I am seeking development of a test online platform for auction-style product listings, inspired by www.kleinanzeigen.de but with a proxy/automatic bidding system. It should support around 500 live listings with photos and accommodate 5000 user accounts. Users should be able to create listings by providing a product description and uploading images. While no payment functionality is required for this stage, the platform must be scalable for future expansion. Ideal skills include experience in developing user-friendly auction systems, database management for scalability, and responsive web design.