AI Chat and Image Platform

Next.js and PostgreSQL platform with persisted AI chat threads, image generation workflows, API key issuance, token metering, and OpenAI-compatible proxying for 200+ monthly active users.

Overview

This project is a production-style AI chat and image platform built with Next.js, TypeScript, and PostgreSQL. The goal was to move beyond a simple chat demo and build the surrounding infrastructure users and developers expect: persistent conversations, account sessions, metering, quotas, API keys, documentation, and robust access control.

What I Built

Built persisted chat threads and image workflows in Next.js with TypeScript.
Served 200+ monthly active users with token metering and quota-aware request handling.
Implemented secure authentication with NextAuth sessions.
Added developer tooling including API key issuance, usage tracking, OpenAPI documentation, and an OpenAI-compatible proxy.
Applied production patterns including serverless API routes, provider proxying, response sanitization, client-side cache/pagination, and access control.

Technical Stack

Next.js
TypeScript
React
PostgreSQL
NextAuth
Serverless API routes
OpenAPI
AI provider proxying

Impact

This project gave me practical experience designing the full surface area around an AI product, not just the model call. I focused on the parts that make the system usable and maintainable: identity, quotas, auditability, persistence, and clean client/server boundaries.