Bo's Engineering Notes

Posted on July 12, 2020

Telegram builds a set of features to make users consume content inside the app. This article explains why Telegram needs these features and how they are implemented efficiently. [Read More]

Posted on June 22, 2020

Bubbles is a type of UI that‘s almost an integral part of our daily life. It’s a trivial job if a message is either a piece of plain text or one image file. The problem in Telegram is difficult as there are many message elements, such as texts, styled texts,... [Read More]

Posted on June 14, 2020

Telegram-iOS builds most UIs upon AsyncDisplayKit. It’s folked as a submodule of the project, in which many features have been removed and some of them are re-implemented in Swift. This post talks about the component structure and the UI programming pattern in the project. [Read More]

Posted on June 5, 2020

TCP is the only active MTProto transport on Telegram-iOS as I explained in the previous post. Let’s continue with the implementation details of connection management for MTProto. [Read More]

Posted on May 15, 2020

Let me use one more post to finish the introduction of the foundation modules of the project. [Read More]

Posted on May 11, 2020

Telegram-iOS uses reactive programming in most modules. There are three frameworks to achieve reactive functions inside the project: [Read More]

Posted on May 7, 2020

Telegram is one of the most popular instant messengers in the market. As of April this year, its MAU has passed 400 million. It’s a great achievement considering its service is not available in some countries. [Read More]

Posted on March 31, 2014

Posted on January 17, 2013

Posted on January 14, 2013