Site Reliability Engineer / Observability Infrastructure

(Japanese follows/日本語は下記)

■Team Introduction

LINE provides a messaging service to hundreds of millions of the users in the world-wide, which means that we have large-scale systems with high availability requirement. Observability Infrastructure team at LINE is the team behind the monitoring infrastructure which helps LINE engineers to maintain the availability of those systems. You will be part of the team that builds metrics, log and trace data pipeline which serves hundreds of millions of data points and events per minute, as well as visualization system which helps other engineers to easily troubleshoot their application.

■What you'll do

- Design, build and deploy software systems that run 24/7 at scale.
- Write tools which improve reliability of current running system.
- Define on-call process and standards.
- Collaborate with other engineers over LINE to design new feature of our observability stack.
- Participate in code reviews to ensure code quality, including Open-Source projects.


LINEのメッセージングサービスは世界で数億人のユーザーに利用されており、それを支える大規模システムには高い可用性が求められます。Observability Infrastructureチームでは、こうしたシステムの可用性を維持しやすくするためのモニタリングシステムを担当しています。例えば、毎分数億個にも及ぶデータポイントやイベントのメトリクス、ログ、トレースのデータパイプライン[y1] を構築し、アプリケーションのトラブルシューティングに役立つ可視化ツールを提供しています。


- 24時間365日稼働する大規模なソフトウェアシステムの設計・構築・デプロイ
- 既存のシステムの信頼性を向上させるためのツールの作成
- オンコールのプロセスや基準の定義
- 社内でエンジニアと連携し、彼らが満足できるモニタリングプラットフォームの新機能提案、開発
- コードレビューを通じたコード品質の担保(オープンソースプロジェクトを含む)
(Japanese follows/日本語は下記)

■Minimum Qualification

- Familiarity with linux performance analysis tools like tracers, profilers, debuggers, visualization tools.
- Experience to operate, introduce open source software to production at scale (ElasticSearch, Cassandra)
- Interest in metrics and devops practice

■Preferred Qualification

- Experience building and supporting large-scale distributed systems that back a consumer app or website.
- Experience integrating performance tools into Continuous Integration/Deployment pipelines.

- Linux性能解析ツール( tracers, profilers, debuggers, visualization toolsなど)に慣れていること
- 大規模な本番環境でOSS(ElasticSearch、Cassandra)を導入・運用した経験
- メトリクスやDevOpsへの興味・関心

- コンシューマ向けアプリやサイトのための大規模分散型システムを構築・支援した経験
- CI/CDパイプラインに性能解析ツールを組み込んだ経験
Location: Tokyo, JAPAN

Shinjuku Office /JR SHINJUKU MIRAINA TOWER 23rd FL.,4-1-6 Shinjuku,Shinjuku-ku,Tokyo,160-0022

*Click office name above to see exact location
Please check our working hours and benefit as below.
待遇 / 福利厚生
■Working hours
One of the followings will be applied: Discretionary labor system for professional work (Employee is deemed to have worked for 9.5 hours a day, regardless of the actual number of hours worked), Flex-time system (core time: 11:00 am–4:00 pm) or 10:00 am–6:30 pm(actual working hours 7 hr 30 min) *To be determined after the interview process

: Weekends (Saturdays and Sundays), national holidays, paid leave, New Year’s holiday, congratulatory and condolence leave, "Refreshment" leave (every 5 years, employees who have been employed under a continuous contract are entitled to 10 days of paid leave)

: Annual salary system (To be determined based on skills, experiences and abilities after discussions)
・Annual compensation will be divided into 12 months and paid on a monthly basis.
・Separate incentives available (*1)
・Compensation revision: twice a year
・Allowances: commuting allowance, LINE Pay Card Benefit Plan (*2)
(*1) In addition to your annual compensation, you may receive incentives (twice a year) depending on the company's and individual performance and evaluation on your performance.
(Incentives are not guaranteed to be provided. An incentive payment will only be paid if you remain employed as of the payment date. (*2) This is an allowance separate from the salary meant for employees to use for their health, personal development, support for raising the next generation, and more.

: Employment insurance, workers accident compensation insurance, health insurance, employees pension insurance

: Periodic health checkup;
Company events and others

Details to be shared during interviews.