ADED

MY CONTRIBUTION

Built marketplace workflows across React, Node.js, Express, MongoDB, identity, media, search, real-time messaging, seller tools, social features, and moderation operations.

THE HARD PART

Preserving a low-friction listing and discovery experience while handling multilingual intent, structured filters, embeddings, media uploads, guest continuity, and real-time seller communication.

WHAT SHIPPED

• Built AI-assisted listing creation with structured suggestions, dynamic follow-up questions, media handling, and guest-to-authenticated continuity.
• Implemented multilingual hybrid discovery using query translation, intent analysis, structured filtering, embeddings, and MongoDB Atlas Vector Search.
• Built seller shopfronts, saved items, history, follows, subscriptions, notifications, moderation, and persistent translated buyer/seller chat.

TECHNICAL DETAILS

• Socket.IO supports persistent conversations, unread state, delivery events, and translation preferences.
• Cognito and Amplify provide identity integration while S3 presigned flows handle marketplace media without routing large files through the application server.
• Product models support listings, shops, categories, discovery history, social relationships, notification state, reports, and moderation actions.

TECHNOLOGY

React · TanStack Router · Node.js · Express · MongoDB · Socket.IO · OpenAI · Atlas Vector Search · Cognito · S3