This position is closed and is no longer accepting applications.

Software Engineer, Observability

LINE Corp. Shinjuku-ku, Tokyo
  • 💴 No salary range given
  • 🏡 Partially remote
  • 🧪 Minimum years of experience unspecified
  • 💬 Fluent Japanese
  • 🌏 Apply from abroad
  • 🧳 Relocate to Japan

About LINE Corp.

LINE Corp. Shinjuku-ku, Tokyo

At 83 million domestic users, or 65% of the population, LINE is Japan's most popular messaging application. It is also popular throughout Asia, boasting approximately 186 million users globally.

Key benefits

  • Build reliable systems at scale
  • Room to grow
  • Healthy work/life balance

About the position

Many of LINE’s services are oriented toward global services. At this very moment, there are new services being developed by LINERs around the globe. In order to provide stable and reliable services to customers, it is crucial to have high-level monitoring technology and systems. We focus on building these systems for in-house engineers. We are also creating a high-level development culture for enjoying the challenges of implementing and adopting cutting-edge technologies, and for building best practices and propagating them to the entire company.


  • We are seeking Software Development Engineers excited by this opportunity to deal with massive data that set us apart from other companies. You should also be passionate about getting feedback from our outstanding fellow developers as well as influencing them directly.
  • Development of a large-scale observability system used to monitor LINE services
  • Development of large-scale Metric/Log Stream/Distributed Tracing/Events Logging collection pipeline and processing system
  • Development and operation of self-developed Time Series Database to manage large-scale metrics Operating various large-capacity open source storage for storing and managing massive data


  • Experience in developing and operating server-side applications
  • Experience in using Linux
  • Basic knowledge in computer science
  • Ability to write clean and succinct code
  • Growth mindset and a desire to learn, teach, and improve skills
  • Experience with one of programming languages: Java, Go, Kotlin, Rust
  • At least one Business-level language (Japanese or English)

Nice to haves

These aren’t required, but be sure to mention them in your application if you have them.

  • Experience or interest in application monitoring or related development
  • Experience or interest in improving distributed application performance
  • Experience with Observability/Monitoring tools (Prometheus, Grafana, Influxdb, Datadog, New Relic, …)
  • Experience with developing and operating frontend applications
  • Love contributing to open-source softwares (Kafka, Elasticsearch, Cassandra, …) Ability to speak and write in Japanese or Korean or English fluently

Meet LINE Corp.'s Developers

Photo of Swapnali Koli

Joining LINE as a QA Engineer

with Swapnali Koli

Swapnali had been working at a Japanese company as a QA Engineer. Looking for a new challenge, she joined LINE, where she’s led their private cloud API automation project.

Read her story...

Li was working in Toronto when he was recruited to join LINE as a principal engineer. He tells his story of relocating to Japan.

Read his story...
Photo of Matthew Bailey

Growing a career in Japan

with Matthew Bailey

Starting as a server side engineer at LINE, Matt is now a software development manager. He shares his experiences of finding a job in Japan, and gives tips on how you can be successful at landing one too.

Read his story...

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