How a PM Built a Global eSIM Marketplace in Weeks with AI
Using generative AI as his de‑facto engineering team, a product manager turned a €300 roaming nightmare into Simsima, a marketplace that sells eSIM plans for 190+ countries via a Next.js web app and React Native mobile app. Building solo, he cut a six‑month, multi‑engineer project down to weeks, proving that PM‑level specs unlock rapid AI‑driven development.