Design Stripe

Hard|

Amazon, OpenAI, SoFi

Stripe is a financial infrastructure company that helps businesses accept and manage online payments. It provides developer-friendly APIs for things like credit card payments, subscriptions, invoices, fraud detection, and marketplace payouts. In simple terms, Stripe lets companies add payment features without building the entire banking and payment system themselves. It is widely used by startups, SaaS companies, e-commerce stores, and marketplaces to handle payments securely and at scale.

Design Dropbox

Medium|

Amazon, Coinbase, Meta, Pinterest

Dropbox is a cloud storage and collaboration platform that lets users store, sync, and share files across devices. It is commonly used by individuals and teams to organize documents, collaborate on projects, and securely access files from anywhere. Over time, Dropbox has expanded beyond file storage into productivity tools like document workflows, e-signatures, and team collaboration features.

Design Google Doc

Hard|

+2Amazon, Expedia, Google, Meta plus 2 more companies

Google Docs is an online document editor from Google, similar to Microsoft Word but cloud-based. It lets users create, edit, share, and collaborate on documents in real time. Since files are saved in Google Drive, people can access them from different devices and work together through comments, suggestions, and live editing.

Design Tinder

Medium|

Amazon, Uber

Tinder is a popular dating app where people create profiles with photos, a short bio, and basic personal details. Users swipe right if they are interested in someone and swipe left if they are not; when two people both swipe right, they “match” and can start chatting. It is commonly used for dating, casual conversations, and meeting new people nearby.

Design Google News

Medium|

+2Amazon, Atlassian, Meta, Oracle plus 2 more companies

Google News is a news aggregation product from Google that collects news articles from many publishers and organizes them by topic, source, location, and user interest. Instead of writing its own news, Google News crawls and indexes articles from news websites, then ranks and groups related stories so users can quickly see what is happening across different sources.

Design Web Crawler

Hard|

+1Amazon, Atlassian, Expedia, Google plus 1 more companies

A web crawler is a program that automatically visits web pages, reads their content, and follows links to discover more pages. Search engines like **Google** use web crawlers to scan the web, collect page data, and build an index so users can search for information later.