Last week I built an AI-powered content repurposing tool called MultiPost. You write one article, it generates platform-optimized versions for Twitter, LinkedIn, Dev.to, Reddit, and Indie Hackers.
The product works. The AI engine cost ~¥0.01 per conversion. The whole thing went from zero to deployed in ~48 hours.
But this post isn't about the product. It's about how it works under the hood — the architecture decisions, the AI prompt design, and the deployment tricks I learned along the way.
The Architecture at a Glance
Here's the full stack:
