Cheapass.in was an Indian e-commerce price drop alerting system. It was used by over 7.5k users, and at shutdown, it had sent over 6,50,000 price drop alerts. This talk will walkthough the learnings I had as a solo developer/entreprenuer in building a product for Indian consumers - with both technical and business aspects to it. I’ll talk about how I built and scaled a full stack JS application over a span of 3 years - managing NodeJS servers, MongoDB, Android and iOS apps, Web clients (including a website, bookmarklet and a twitter bot). We’ll then look at replicating core product offerings by adopting a serverless architecture using Zeit Now, AWS Lambda and Google Firestore. This talk covers technical, growth marketing, and business aspects of building a product and is, therefore, intended for anyone interested in listening to a real story behind a real product.