App Development Server-side Engineer

  • Tokyo
  • Partial Remote
  • Full-time
  • November 12, 2023
4,500,000 - 8,000,000 JPY /yr
Apply from Anywhere 👍
Relocation to Japan 👍
(Overseas visa sponsorship supported)
Language Requirements
Japanese: Business Level
English: Not Required


Our services, including Pokecoro, have begun to be supported not only by women in Japan, but also by women all over the world.
With the expansion of the company/business, there is a shortage of engineers to "support" the cute.

No women's services! If you've ever wondered what it's like to be an engineer, why don't you take advantage of your sensibility and experience as an engineer and join us in the challenge of developing the world's most adorable service? ※Depending on your aptitude, we may be able to offer you a position as a server engineer for a billing (payment) system.

Job Description

- Experience in designing and developing server applications
- Experience in developing applications using RDBMS
- Experience in developing web applications

How to Work at Cocone

You will work in collaboration with planning staff and designers. Seating is also available in each division, with planners and designers in the same place.
What mid-career hires often say is the good thing about COCONÉ: "The organization is flat! There is no hierarchy by occupation.
The culture is not to just do what comes in as it is, but to think about all industries for the benefit of the customer while expressing the opinions that only development can offer.

In the past, we used Java to build the server side, but in the future, we will adopt golang and other new things are relatively easy to implement.

Technology Stack

Java, Kotlin, Golang
Spring Framework, Spring Boot, Gin
Tomcat, nginx,
MariaDB, MongoDB, Redis,

Compensation Annual:4.5 - 8 million
※1/12th of every month will be paid
※including 45 hours of deemed overtime
※For full-time employees, housing allowance is included
※It will be determined according to skills and experience.
Minimum Requirements 2+ years of server-side development experience in Java, PHP, Ruby, Python, etc.
Preferred requirements - Experience developing and operating services with medium and large scale users
- Experience developing applications using NoSQL
- Experience tuning middleware such as Tomcat and Nginx
- Experience configuring Linux kernel parameters such as DB and AP according to the purpose
- Experience developing and operating services in cloud environment such as AWS and GCP
- Experience publishing personal applications (web, client or not)
Our Ideal Candidate [People to work with]
September 2013, I joined the company/lead engineer for server development

●Background before joining COCONE
In an advertising agency, I developed and operated an email distribution system and an official site for mobile phones,
Developed a survey site, etc.
Engaged in server development with PHP and client development with Android

●Why I joined COCONE
The atmosphere of the interviewer was suitable for me.

●What I'm interested in
Lately, I've been re-reading Effective Java, Readable Code, etc.
I'm also thinking about what kind of environment is easy to develop.

●I'd like to work with someone like this
Who is able to take responsibility and work by themselves until the end.
Someone who can speak his or her mind.
I'm working with this idea
If there are people around me who are in trouble, I want to help them in some way. If it can be solved with the technology I have, I'd like to use it to the fullest to move forward.
If we can't solve the problem, we try to work together to solve it from the point where we can.
Just because you're in development doesn't mean that you're working on your own.
If you're good enough to be a tech lead, I want you to pull everyone along with your technology, and if you can take care of people's hearts, I want you to make a move to understand everyone's feelings.
I have such a feeling.

Japanese follows:




- サーバーアプリケーションの設計開発経験
- RDBMSを利用したアプリケーション開発経験
- WEBアプリケーションの開発経験


また、これまで Java でサーバーサイドを構築することが多かったのですが、今後は golang を採用するなど

Java, Kotlin, Golang
Spring Framework, Spring Boot, Gin
Tomcat, nginx,
MariaDB, MongoDB, Redis,

想定給与 年俸:450 ~ 800万
必須スキル・経験 Java, PHP, Ruby, Python などサーバーサイドの開発経験2年以上。
歓迎スキル・経験 - 中規模、大規模ユーザーを抱えたサービスの開発運用経験
- NoSQL を利用したアプリケーション開発経験
- Tomcat, Nginx などのミドルウェアチューニング経験
- DBやAP など 用途に合わせた Linux カーネルパラメータ設定経験
- AWS, GCP などクラウド環境でのサービス開発運用経験
- 個人アプリケーション公開経験 (web, client 問わず)
求める人物像 【一緒に働く仲間】
主にPHPでサーバー開発、Android でのクライアント開発に従事


最近は Effective Java、リーダブルコードなど読み直したりしてます。



Cocone was founded in 2008 with a focus on Smartphone app development and educational services. Nowadays they focus mostly on building “avatar” mobile apps. Their most popular app (“Pokecoro”) has over 16 million downloads. In fact they just celebrated the 9-year anniversary of the app’s release.

With their mobile apps, Cocone wants to create a fun digital environment where people can interact and share experiences. They hope their apps will help their users have fun and feel even more fulfilled with their lives.

Cocone is hiring more members to work on building their in-house products, doing everything from ideation to design to engineering. They hope to further increase the speed of development and handle everything from ideation to design to marketing the products.

Cocone's policies during COVID-19 are as follows:

  • Cocone’s revenue has continued to grow despite COVID-19. In fact they’re working on several new projects at the moment, so they plan to continue to actively hire engineers and other positions. They’ve also introduced the ability to work remotely during COVID-19, allowing 8 remote days per month (at the time of writing).
View Cocone's company page

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App Development Server-side Engineer at Cocone
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