NFT City

NFT City is a marketplace for discovering, collecting, and minting NFTs on the NuGenesis blockchain. Users browse live listings with pricing and ownership history, mint single-edition collectibles through a guided creation flow, and connect a non-custodial wallet without handing over private keys. SSO ties the platform into the wider NuGenesis network one account across the marketplace, wallet, and chain explorer.

• ▸Paginated, filterable listing grid with live pricing and ownership data
• ▸Per-listing metadata: price, owner, creation date, sale status
• ▸Guided NFT creation flow artwork to minted NFT with clear on-chain confirmation steps
• ▸Non-custodial wallet connection private keys never leave the user
• ▸SSO across the NuGenesis marketplace, wallet, and explorer

A media-heavy NFT catalog has a straightforward failure mode: it gets slow as it grows, and falls over under drop traffic. We built around a standard, proven pattern to prevent both.

• ▸NFT images and media in S3-compatible object storage, decoupled from the application
• ▸CDN-fronted asset delivery listing images load fast regardless of visitor location
• ▸Load-balanced application instances no single point of failure
• ▸Microservices split by responsibility: listings, minting, wallet/auth, and search scale independently

The marketplace grid has to stay fast no matter how large the catalog gets every card is an image, a price, an owner, and a creation date, multiplied across thousands of listings and constantly re-sorted as items are minted or sold. Getting pagination, filtering, and sort performance right at catalog scale was the core backend problem.