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Object-oriented design · System design
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Given an existing single messaging API supporting SMS and email channels, design a bulk messaging API capable of handling up to 1 million messages, addressing…
Companies: Twilio
Last reported Oct 2026
Design a Notification System that validates a request of notification to be valid
Companies: Twilio, Amazon, Microsoft
Last reported Jul 2026
Design a cloud billing system similar to AWS that can handle billing and cost management for different cloud services like EC2, Lambda, and S3. The…
Companies: Twilio, Moveworks
Last reported May 2026
Design a system that allows users to subscribe to upcoming offers on an e-commerce platform and receive real-time notifications (email, SMS, push, or in-app) when…
Companies: Twilio, Google
Last reported Nov 2025
Design a food delivery platform like Uber Eats that allows users to search for nearby restaurants based on location, radius, and cuisine type, while enabling…
Companies: Twilio, Meta, Uber
Last reported Oct 2025
Design a location-based service like Yelp that allows users to search for nearby businesses using latitude/longitude coordinates, with support for global scale and high query…
Companies: Twilio, Apple, Meta, OpenAI +1
Last reported Oct 2025