Server-side Engineer / Major IT Company

【About the Company】

The company is developing an e-comics service for smartphones that allows users to easily enjoy manga works via an app. This service is expanding in the Japanese market as a member of "WEBTOON worldwide service," an alliance of platform services that boasts the overwhelming world's largest scale in this market, with 82 million global monthly users, over 200 million cumulative downloads, and a monthly circulation of over 10 billion yen.

The company's service has grown steadily since its release in 2013.

＜Most recent results＞
・2021 Domestic App Spending Ranking #2 (as of January 2022/Exhibit: App Annie)
・Non-Game No. 9 in global mobile app revenue ranking (as of June 2021/exhibit: Sensortower)
・No. 1 in Google Play free popular apps ranking (as of December 6, 2021/Exhibit:Google Play)

【Job Description】

■Responsibilities
・Profiling of the system and implementation of measures and development to ensure stable operation of the system independently
・Development of new features using Kotlin
・Architectural design considering performance and scalability
・Development from the user's point of view for service improvement
・Service development in collaboration with the planning team and development team members from other departments
・Ensuring code quality through code reviews on GitHub

■Development Enviroment
・Languages/Frameworks: Java, Kotlin, Spring Boot
・Technology stack: MySQL, Redis, Kafka, memcached, Hbase, Elasticsearch, Docker, in-house IaaS and PaaS services, etc.
・Tools: Github Enterprise, JIRA, Confluence, Jenkins, Drone, Slack, Trello
・Development terminal: M1-based Mac, Macbook Pro, iMac 5K, etc. (confirm desired PC before joining the company/multiple PCs can be lent), external monitors and verification terminals can be lent.

■Attractiveness
・Value the concept of "User First" very much. It is very rewarding to be able to have people close to you, such as family and friends, use the product and see the user's reaction directly.
・Value the "Take Ownership" attitude, working on projects with a sense of ownership. The company has a flat corporate culture where opinions can be expressed regardless of position or age. You can enjoy proactively proposing improvements and growing the service independently.
・Large-scale traffic is generated and technical challenges are always required. Every time you solve a service problem, you will be able to improve your skills.

■Career Paths
There are three main career paths after joining the company.
1. Individual Contributor: Contribute to the team through designing, coding, and reviewing, while developing technical skills as an individual engineer.
2. Tech Lead: Organize a small to medium group of engineers and lead the development and technical skills of the team.
3. Engineering Manager: Organizes a medium to large group of engineers and aims to maximize the output of the team.

＜Recent Achievements＞
・2021 Domestic App Spending Ranking #2 (as of January 2022/Exhibit: App Annie)
・Non-gaming 9th in global mobile app revenue ranking (as of June 2021/exhibit: Sensortower)
・Due to the large scale of the service, it is not easy to continue serving users even in high-traffic situations, but it is technically very challenging and highly rewarding because you can directly see the users' reactions.

■Working Hour
Discretionary Work System
(10:00～18:30)

■Welfare
・Full social insurance
・Commuting allowance
・Medical checkups
・Various in-house events, etc.

■Measures to prevent passive smoking
・In principle, no smoking indoors (smoking rooms are available indoors)
　・Yotsuya Office, Minami Shinjuku Office, Osaki Office

・Salary revision: Twice a year
・Allowance: Transportation expenses (in accordance with company regulations), LINE Pay Card Benefit Plan(*2)

(*1) In addition to the annual salary amount, incentives may be paid twice a year depending on the company's and the individual's performance and evaluation.
(This is not always paid. Only employees who are enrolled at the company on the date of payment are eligible for the payment).
(*2) This allowance is paid separately from salary for the purpose of "health maintenance and improvement," "self-development," and "next-generation development" of employees.

■Holiday
・Saturday/Sunday/National Holiday
・Annual Paid Leave
・New Year Holiday

【Required】
・3+ years of experience developing web applications using Java
・Basic knowledge of computer science (algorithms, data structures, databases, networks, etc.)
・Experience in software development in a team environment
・Experience in development using RDBMS

【Preferred】
・Experience in consumer service development
・Experience developing large-scale web services
・Experience in defining requirements and designing software architecture
・Experience developing web applications using Spring Boot
・Experience developing web applications using server-side Kotlin
・Experience in development using nginx, Kafka, Redis, MySQL, gRPC, K8s
・Experience in automation of development environment by CI/CD using Jenkins/Drone/CircleCI etc.