Connecting with Vietnam’s Tech Community

Going with the flow of the IT landscape, and also as the first step on our journey to build LINE Technology Vietnam a desirable employer brand, we aspire to increase our share of voice and presence, and connection to IT talents via varied activities. The community’s positive and widespread reception will send ripples across the society, propelling us on our way to contribute to Vietnam’s tech sector, and become the top-of-mind brand in both employees’ and candidates’ heart alike.

With the new year 2021 on our doorsteps, we invite you to reflect with us on what we did throughout the past year.

[Team & Project] Introducing the team in charge of Site Reliability Engineering for the Verda platform

In the Team & Project series, each department and project in LINE’s development organization is introduced in detail, including their roles, structures, technology stacks, future issues, and roadmaps. This time, we will introduce the team that is working on Site Reliability Engineering (SRE) for Verda, which is LINE’s private cloud. We spoke with Park Youngwoon, […]

Performance Test in Jenkins – Run Dynamic Pod Executors in Kubernetes Parallelly

Performance tests are a necessary and crucial part of all services in LINE, which ensures that software applications will perform well under the expected workload. Whenever features which may affect overall user experience are implemented, performance testing is executed as a part of the testing plan. But setting up and maintaining a performance test environment is […]

Using user story points for smarter project management (feat. LINE Pay dev team)

Getting started In this post, I’d like to share the use cases of story points during LINE Pay’s app and server development. I hope this post will provide you with an opportunity to understand story points better and make good use of them. What are story points? Before directly diving into story points, let’s first […]


Hi, this is Momoki from Developer Success Team.

We held LINE DEVELOPER DAY 2020, LINE’s technology conference, for three days from November 25 to 27. First of all, I would like to thank everyone who participated, all the guests and internal speakers, and everyone involved in the organization of the event.

LINE DEVELOPER DAY 2020 was our first online event due to the spread of COVID-19. In this article, I will look back at the trends in registration, participation, and viewing of LINE DEVELOPER DAY 2020, along with various figures, by excerpting and editing some of the content from the internal report.

【Team & Project】 Introducing LINE’s Infrastructure Security Experts

LINE’s software engineers belong in development centers comprised of different departments running various projects. The Team & Project series takes a closer look at these departments and projects, their roles, team structure, tech stacks, challenges that lie ahead, roadmaps, and more. In this blog post, we interviewed members of the Infra Protection Team who keep […]

Engineers at LINE Fukuoka Participated in a Virtual Hackathon

At the LINE Fukuoka development department, 80 engineers participated in a remote ideathon and hackathon for two weeks. I’ll introduce how we prepared the event remotely and the deliverables that were presented at the event. Engineers at LINE Fukuoka participate in a hackathon every year (except last year when we couldn’t run the event). This […]

Introducing Frey: LINE’s new self-service batch ingestion system

Hi, this is Yang Xu from Data Engineering 1 of the Data Platform department. Our department runs a huge Hadoop cluster and provides various services for data analysis, machine learning, and so on. One mission of our team is providing a batch ingestion service, which ingests data from different storages into our Hadoop environment for […]

Kafka-based job queue library ‘Decaton’ examples

Introduction: Decaton LINE recently released an in-house developed library, Decaton, as open source. Decaton is a Kafka-based asynchronous job queue library, and it is widely used throughout LINE. GitHub: line/decaton – High throughput asynchronous task processing on Apache Kafka In fact, Kafka offers Kafka Streams, its official library for processing streams. However, Kafka Streams did not […]

Abuser detection random forest model and hyperparameter tuning

Hello everyone, I’m Dekai Wah, currently an intern at LINE’s Game Security Department. In our department, we work on different facets of securing games from cheating behavior. These could range from obfuscating code to analysis of suspicious behavior on our game servers. In this project, my teammate Yoshiki Kusama and I analyzed the game data retrieved from our […]