Blog - LINE ENGINEERING

As of October 1, 2023, LINE has been rebranded as LY Corporation. Visit the new blog of LY Corporation here: LY Corporation Tech Blog

Buffer overflow in PJSIP, a VoIP open source library
Kim Youngsung2018-02-26
He's a security engineer at LINE. He enjoys looking for bugs and is highly interested in secure coding.
Hi all, I am Youngsung Kim (Facebook, Twitter) of the Application Security team at LINE and am in charge of evaluating security of LINE services. On this post, I'd like to share a vulnerability (CVE-2017-16872, AST-2017-009) of PJSIP, a VoIP open source library. PJSIP is a multimedia communication library based on the following standard protocols; SIP, SDP, RTP, STUN, TURN, and ICE. The Asterisk framework, widely used on IP-PBX and VoPI gateway has an SIP stack implemented based on PJSIP.
Functional programing language and LINE GAME Cloud
Bu Sung Kim, Jae Ho Lee2018-02-25
Bu Sung: Develops the LINE GAME Promotion platform. He is interested in programming languages and started learning Kotlin just recently. Jae Ho: Is a Game Tech PM at LINE. His recent interest is JavaScript.
We are junior engineers, Bu Sung Kim and Jae Ho Lee at LINE, working on the LINE GAME Platform. We have a great interest in functional programming languages. It all started with learning that the LINE GAME Cloud is developed in Clojure, one of functional programming languages. On this post, we would like to take you through some of the characteristics of functional programming languages in association with the use cases of the LINE GAME Cloud. LINE GAME Cloud & Functional Programming LINE GA
Using Docker to build a testing infrastructure for web UI and mobile
Chloe Chao2018-02-18
She used to be a QA automation engineer at LINE.
Suppose you are to setup test automation. Building and maintaining a whole test infrastructure all by your team can be painful. Although some cloud services like Sauce Labs do cover DevOps, you may have hesitated to use them due to security issues or budget concerns in your company. Docker is a good tool for you to setup and maintain servers for test automation, especially if you are just starting to build an automation test infrastructure with open source solutions. Of the open source solutions
LINE Security Bug Bounty Program Report 2017
Lee Myeongjae2018-02-13
He is a security engineer at LINE.
Hello again, this is Myoungje Yi (MJ) from LINE's security team. I'd like to share our annual report on running the LINE Security Bug Bounty Program in 2017. Program scope expansion & donation option The 'LINE Security Bug Bounty Program' aims to provide LINE users the most secure service by fixing potential vulnerabilities in advance, by getting reports from external security researchers. As we have already mentioned in our previous post, we have expanded the program scope in 2017, which re
- Security
- Bug Bounty
Announcing the LINE API experts 2018 Q1
Shinichiro Isago2018-01-30
LINE Engineer
日本語版 LINE API Expert is a program that recognizes skilled engineers who have a deep understanding of the APIs provided by LINE and are influential in the community by giving them the title of "LINE API experts". In addition to providing an array of benefits, LINE will also support the various activities of these LINE API experts through this program. https://developers.line.me/en/expert/ LINE Messaging API for LINE Bot and the social login system, LINE Login, are wide open for developers to us
- LINE API Expert
LINE iOS/Android Hackathon 2017
Hyeonji Jo2018-01-30
She's a LINE iOS developer.
Nice to meet you all. I am Hyeonji Jo, an IOS developer at LINE. On this post, I'd like to take you to the LINE Hackathon 2017, held in December 13th to 15th, 2017. LINE has been holding regular workshops for LINE's iOS and Android engineers, consisting of a number of sessions and a short, day-long hackathon. A lot of feedback to the previous workshops demanded more time for the hackathon; participants had brilliant ideas but the time allocated had been a bit too short to develop them. So, t
- Android
- iOS
- Hackathon
Easy code-splitting with grow-loader
sunderls2018-01-23
sunderls is a front-end engineer
Hi, I'm @sunderls from LINE MANGA team where I mostly write JavaScript. Did you know that you can read free Manga directly from LINE1)? Has anyone tried it? As we shared on our previous post, LINE MANGA: Smooth page transition with Page Stack, LINE MANGA is built with web technologies. Because it runs in within the LINE app, we have put in a great effort to create a smooth user experience, and as one of the means to accomplish our goal, we have chosen code-splitting. Today, I'd like to introduce
LINE MANGA: Smooth page transition with Page Stack
sunderls2018-01-17
sunderls is a front-end engineer
Hello, my name is ＠sunderls, and I am involved in LINE MANGA as a JavaScript developer.Have you all noticed that you can now read manga on LINE?1) If this is a news to you, tap the more button (...) and then the LINE MANGA menu to take a ride through countless awesome manga available on LINE.To let you in on a little secret, the screen you are seeing below is implemented with web-based technology. We think the smoothness of the screen transition is close to that of a native app. What do you thin
- LINE MANGA
Providing Prometheus as a service
Paul Traylor2018-01-14
Currently working on making server monitoring and alerting easier for developers to use.
I'm Paul Traylor with LINE Fukuoka's Development Department where I focus on monitoring many servers used to support LINE Family Apps. For most developers, it's much more fun to focus on code and adding new features but when things are running poorly it's useful to know why. Since it's sometimes difficult to configure monitoring by yourself, it has been my responsibility to make it easier to use so that all services can be monitored for peak performance. As part of this, we developed Promgen to
- Prometheus
- Promgen
How we redesigned the LINE Developers documentation site
Kenneth Lau2017-11-06
Technical writer in charge of developer documentation for the LINE Platform
Hi, my name is Kenneth Lau and I'm a technical writer working on the documentation for our developer products here at LINE. As you may have already noticed, we recently released a major update to our LINE Developers site, which provides information about our developer products such as LINE Login and the Messaging API and a developer console for managing your apps. For a quick breakdown of the changes to the site, see our Introducing the redesigned LINE Developers site news post. In this blog pos