Senior Web System Developer

Job Type
6,000,000 JPY - 8,000,000 JPY (paid overtime beyond 30hrs/M) per year
Japanese Level
Advanced (JLPT Level 1)
English Level
Advanced (TOEIC 860)
Start Date


An IT Security service company is looking for a Senior Web System Developer!


They provide digital certificates to customers around the world, which is an important factor for ensuring security on the Internet.

For this role, they are constructing and operating a system mainly in Japan that performs orders, issues, and deliveries of electronic certificates.

With the increasing awareness of security on the Internet in these days, the needs and usage of digital certificates are diversifying.

In order to meet these new needs and ever-changing requirements, the system also needs to change to a highly available and flexible form.


【Key Responsibilities】

- Code creation using Java EE

- Specification based on consideration of code creation

- Code review

- Bug triage

- Creating failure reports

- Managing engineer team (depending on your experience)


【System environment/Development environment】

Language: Java EE, JavaScript

OS: Linux

Database: PostgreSQL

Java framework: Spring

Project management: JIRA, Confluence





- Java EEを使用したコード作成
- コード作成のもとにした仕様
- コードレビュー
- バグ・トリアージ
- 障害レポートの作成
- エンジニアチームのマネジメント(ご経験に応じて)


言語:Java EE、JavaScript



【会社概要 | Company information】



Since 2006, they joined as a member of a major Japanese Internet group, and are currently developing government-level security worldwide based in Japan, the United States, Europe, Asia, and the Middle East. The cumulative total is over 25 million.

They are developing services mainly in Japan, and are developing certificate services that meet various needs not only in Japan but also in the world.

【就業時間 | Working Hours】
10:00 - 19:00(Mon - Fri)フレックスタイム制(コアタイム12:00-16:00)

【休日休暇 | Holidays】
Saturday, Sunday, and National Holidays, Year-end and New Year Holidays, Paid Holidays, Other Special Holidays

【待遇・福利厚生 | Services / Benefits】

<その他>社員向け無料カフェ、おひるねスペース、社内託児所 等
Various social insurance (employee pension insurance, health insurance, work insurance, employment insurance), commuting transportation expenses payment, salary revision twice (January/July), overtime allowance, housing allowance, employee holding system, childbirth Childcare support system, side jobs OK, reduced working hours/working at home OK (with internal regulations)

<Others> Free cafe for employees, open space, in-house childcare center, etc.



Required Skills

- Experience in web service system development

- Experience in Java system development

- Experience as a team leader

- Code review experience

- Knowledge about Linux/Apache/Tomcat

- Development experience using ticket system (JIRA, Redmine, etc.)

- Basic knowledge about PKI (Public Key Infrastructure) and encryption

- Basic knowledge about secure programming


- Webサービスのシステム開発経験
- Javaのシステム開発経験
- チームリーダーとしての経験
- コードレビューの経験
- Linux/Apache/Tomcatに関する知識
- チケットシステム(JIRA、Redmineなど)を使用した開発経験
- PKI(公開鍵基盤)や暗号化に関する基礎知識
- セキュアプログラミングの基礎知識