Development Engineer (iOS/Android) - Working in Japan


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Job Description

*Please apply to only one position at a time.

Both Japanese and Non-Japanese speakers welcomed; Whilst there are many English speakers at LINE successful applicants may be asked to attend a Japanese training course for at least 3 ~ 12 months after joining. The training is paid for by us, and is an excellent chance to pick up new language skills. We encourage employees to reach JLPT N2 within a few years of joining.

LINE is a diverse company with some of the best engineers from around the world, approximately 30% of our developers come from outside of Japan. We are looking for experienced engineers with an interest in customer focused development who wish to make an impact on our tens of millions of daily users!

Job Description:

Projects will be assigned based on our assessment of your experience taking into account your interests and career preferences.

Client Development

You will be involved with the development of, and operational work for, the LINE client and LINE Family App clients.

Specific Responsibilities Include

  • Collaborating with the Planning and Design teams to bring ideas to life (e.g. through coding, creating unit tests, etc.)
  • Performing app profiling and improving performance
  • Improving and maintaining a CI environment that supports stable development Improving code quality through code reviews
  • UI/UX improvement

Examples of Client Development Work

  • Development of sticker/theme/emoji features in the LINE app
  • Development of LINE Family Apps (e.g. “LINE Creators Studio”)

Required Skills:

Either of:

  • Experienced in iOS native application development using Swift/Objective-C (3+ years)
  • Experienced in Android native application development using Kotlin/Java (3+ years)


  • Professional knowledge of at least one programming language
  • Basic knowledge in computer science (e.g. algorithm, data structure, asynchronous I/O, network)
  • Work experience using version control systems (VCS), dependency management systems, and continuous-integration systems (CI)
  • Communication ability in Japanese or English
  • Motivation to learn Japanese

Preferred Skills:

  • Web/Native hybrid applications
  • UI/UX design and implementation (e.g. custom views and interactions)
  • Experience in the coaching, management and/or leadership of a technical team
  • Open-source software development experience and/or participation in open source communities is also a plus
  • Strong interest and ability to learn any new technical topic

Working Hours:
Discretionary and flexible according to ability and speed of work; if projects are completed on time there is no need to stay in the office for extended periods of time.


Minimum salary starting from 6 million Japanese yen per annum (salary based on experience and ability).

*Other details to be discussed during the interview process.


6M ~ 10M JPY/year

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Taipei, Taiwan

About us

LINE Corporation was fully funded by LINE Corporation and established in 2013. Since the beginning, we have worked together with LINE Corporation to rapidly develop our business so that we can continue to grow the LINE brand. Additionally, we want to make use of certain advantages that we enjoy due to our location in Fukuoka, those being our points of contact with users of LINE and our close proximity to the users, in order to contribute work of value including but not limited to improving usability and coming up with new projects for the city. It has been the mission of LINE to bring a "wow" factor to everything we do, in which users are pleasantly surprised with things that exceed their expectations. This concept of "wow" is a core value of LINE Fukuoka as well, and we constantly try various new business projects in the spirit of taking on new challenges.

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