Architecture

How to build a rate limiter

Rate limiter controls the large number of requests to prevent DDOS attacks which can result in the service outage. Commonly,…

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Design a payment wallet

Involvement of money is major part in payment systems. Building a wallet service, mainly consists of money movement. When a…

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Building an API for low latency trading

Architecture: Design tenets: We have the following main entities in the system:Client ApplicationBackend serviceFinance exchange serverClient application invoke the API…

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Build a time-series database

Requirements: It should be able to scale millions of requestsAble to support time series aggregation and fast ingestion Architecture Overview…

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Build a chat messenger

Requirements: User should be able to chat with anyone online or send message to offline Scalable to millions of usersSending a…

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Design Twitter

Requirements A user can follow other usersUser should be able to see the feeds on the homepage Architecture Graph databases…

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Build a distributed web crawler to crawl websites

A crawler service is responsible to fetch the different web pages recursively and persist their content. The crawled web pages…

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Design Instagram

Designing Instagram is one of the most frequent question asked in the interviews. Lets discuss the design approach and various…

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