Website for image sharing

I seek the design and development of a sophisticated image sharing platform to enable users to upload, browse, search and discover photographs in an organized community environment. The site must implement a tiered membership system allowing all visitors to freely view imagery while extending additional privileges to registered and premium subscribers. Basic users may post a nominal amount of photos monthly with registration providing a name and profile. Paid accounts receive unrestricted uploading and optional contact visibility to encourage interaction between fellow members.

The frontend requires an intuitive and visually pleasing interface optimized for media content. Users must be able to easily navigate categorized photo collections, search by tags or uploader. Profile pages will showcase members' images and details. Administrative functionality for moderating content and members is also vital.

Technically, the site necessitates a capable database to store large files and metadata. Fluid responsive design across devices is expected. Account management, payment integration and access levels must be incorporated into the unified platform. Usability and performance should be prioritized. Security measures will protect members and their information.

Please provide estimates and portfolio highlighting relevant experience designing comparable image and community platforms. Creativity and expertise delivering all requisite features within budget and timeline are valued.