Backend Engineer / LINE Creators Market

Job Summary

Team members in this position are responsible for leading the back-end development and operation of the creator-focused services for the sticker, emoji, and theme features.

You will develop various creator-focused features, including the registration and sale of stickers, themes, and emojis, as well as related review processes and sales management.

Additionally, you will contribute to designing and developing a flexible service architecture that enables creators to seamlessly offer a diverse range of products.

 

Mission & Goals

• Our mission is to provide services that enable business features to be developed flexibly and with minimal overhead.
• We strive to build a positive and supportive team and encourage members to realize their goals for personal growth and to exercise autonomy while working on projects.

 

Responsibilities

• Develop and operate services in both Kotlin and Perl environments. While promoting new development using Kotlin, facilitate migration from Perl to Kotlin as needed when modifying existing features.
• Lead the development of back-end services for user-facing features.
• Design architectures that enhance efficiency and flexibility.
• Design and develop services that maintain high standards of availability, reliability, and fault tolerance.
• Support team members in software implementation and operational best practices.
• Collaborate with other teams and actively participate in code reviews and design reviews to support high-quality implementation.

*Scope of Change: There is a possibility of reassignment to any duties as determined by the company.

 

Learn About the Product

LINE CREATORS MARKET

A platform that allows users to create and sell stickers, emoji, and themes on "LINE". Anyone with a LINE account can participate. regardless profession, or whether they're an individual or a business.

Ideal Candidate

• Individuals who understand the relationship between business goals and technical choices and can make technical decisions that contribute to business growth while working with stakeholders.
• Individuals who lead the design and implementation of systems that support the stable operation and continuous growth of services.
• Individuals who demonstrate leadership, support the growth of team members, guide technical decisions, and contribute to enhancing the overall development capabilities of the team.

 

Required Skills ＆ Experience

• 5+ years of server-side application development experience.
• Experience and skills in issue handling and incident response.
• Knowledge of and experience using scalable data storage technology such as MySQL.
• Fundamental computer science knowledge.
• Business level verbal communication skills in Japanese or English.
• Business level written communication skills in English.

 

Preferred Skills ＆ Experience

• JVM application tuning and monitoring.
• Development experience with Kotlin
• Experience in the coaching, management and/or leadership of a technical team.
• Kubernetes-based application development.

 

Development Environment

• Product and Service Development: Kotlin, Ktor
• Observability: Prometheus, Grafana, OpenSearch
• Storage: MySQL
• Infrastructure: Container（Kubernetes）, VM/PM on Private Cloud.
• Infrastructure as Code, CI/CD, Configuration repository: ArgoCD, GitHub Actions

 

Salary

Expected annual salary: JPY 9,000,000 to JPY 14,000,000
Form of salary: Monthly salary (including fixed overtime allowance)
Standard monthly salary: JPY 600,000 to JPY 932,000
(Breakdown of standard salary)
　―Base salary: JPY 465,000 to JPY 725,000
　―Fixed overtime allowance: JPY 134,000 to JPY 208,000

Fixed overtime allowance of 35 hours will be provided, regardless of whether overtime work is performed.
　Note 1: Overtime allowance is paid separately for overtime work in excess of the fixed 35 hours.
　Note 2: Names of items related to monthly salary vary depending on the grades.
　Bonuses are granted a maximum of two times a year. The amount is determined by factors including the company's and your department's performance.

 

Allowances

Overtime allowance, commuting allowance,*1 LY Corporation Working Style allowance,*2 etc.

*1 You will be paid for the number of days you actually came to the office. (Maximum of JPY150,000/month)
*2 Allowance to improve your remote work environment (JPY11,000/month)

 

Work Location

Head office: Chiyoda-ku, Tokyo, Japan
Work location : Hakata, Fukuoka

*You may be required to report to your assigned office based on business instructions. The office assigned to you at the time of employment will be your initial office. Afterward, you may be reassigned to any business location determined by the company.
*The offices are wheelchair accessible.
*Note on measures against passive smoking: In general, smoking is prohibited indoors; however, designated smoking rooms are available.

 

Work Hours

• Flextime system: standard work hours 7 hours 45 minutes (no core hours)
  
  • Start and end times are up to the individual. However, the company's standard working hours are from 9:30 a.m. to 6:15 p.m.
• Shortened working hours are available for childcare and caregiving purposes. 

*Some departments may operate on the standard work hours (9:30 a.m. - 6:15 p.m.), while others may have a shift schedule.

 

Holidays and Leave

• Days Off: Two days off per week (Saturdays and Sundays*1), national holidays, New Year's holiday (December 29 to January 4)

• Leave: Paid leave, special paid leave (for condolence, maternity, sick childcare, nursing care, legally-designated communicable disease, etc.), Happy Friday*2, sabbatical leave

*1 May differ depending on department.
*2 When a public holiday falls on a Saturday, employees will be given the previous business day off.

 

Benefits

• Comprehensive social insurance (health insurance, nursing care insurance, welfare pension insurance, employment insurance, workers' compensation insurance),
• Optional Defined Contribution (DC) Pension Plan,
• Comprehensive Welfare Group Term Insurance,
• Group Long-term Disability,
• Employee Savings Program,
• Cumulative Stock Investment Program,
• Subsidy for re-examination after regular basic/comprehensive health checkup,
• In-house massage room,
• Club activities,
• Subsidy for employee social events, and more