How I Built an AI Contract Generator with Python and DeepSeek

Hey everyone, I'm Alex. I recently built MikaAI, an AI contract generator, and wanted to share the journey.

The idea came from my own pain point. I used to spend hours drafting contracts for freelance work. Hiring a lawyer was too expensive, and online templates were too rigid. I thought — what if AI could handle this?

So I built it. The tech stack is simple: Python + FastAPI for the backend, SQLite for the database, DeepSeek as the AI engine, and Tailwind CSS for the frontend. Payments go through LemonSqueezy, and transactional emails via Resend.

The product lets you generate 20+ types of contracts — NDAs, service agreements, quotes, you name it. It also has a built-in legal risk review feature, supports 26 currencies, and can produce bilingual contracts in English and Chinese.

The hardest part was getting the AI prompts right. Legal language is incredibly precise. One wrong word can change the meaning of an entire clause. I spent weeks testing and refining the prompts to get reliable, professional output every time.

The whole thing took shape over a few intense weeks. FastAPI made the backend trivial, and DeepSeek's API was straightforward to integrate. The real challenge was product design — figuring out what freelancers and small businesses actually need in a contract tool.

If you're curious, there's a free tier at mikaai.online. Would love to hear what you think, especially if you've worked on anything similar with AI and legal tech.