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Application Development, Operation & Maintenance Engineer

Nexus Corporation

Job Location:

Tokyo - Japan

Salary: Not provided by the employer

Experience Required: 4-5years

Posted: 5 September 2026 (10 hours ago)

Application Deadline: 3 December 2026

Vacancies: 1 Vacancy

Job Summary

We are looking for an Application Development Operation & Maintenance Engineer to participate in application development operation and maintenance projects for a leading securities company in Japan. The role covers a wide range of phases from modernising existing systems and new development to operation support while supporting mission-critical financial systems.

Responsibilities:

Analysis knowledge transfer and first- and second-level support for application development and operation and maintenance projects.
Modernization and code improvement of existing applications.
Development of new functions and extensions for existing systems.
Development of new applications.
Fault investigation and incident response for mission-critical systems.
Database design development and maintenance.
Utilization and operational support of related tools and infrastructure such as Jenkins Terraform GitLab CI and Linux scripting.

Requirements

The requirements we are looking for:

Experience in Java application development.
Experience in development using front-end frameworks such as React and Angular.
Experience in database development using MySQL Microsoft SQL Server (MSSQL) or Oracle.
Japanese: Advanced business level with the ability to conduct meetings independently presentations and negotiations with clients and internal stakeholders.
English: Fluent with the ability to communicate complex business issues accurately and smoothly both verbally and in writing.

Preferred Qualifications:

Practical experience with Linux scripting.
Experience in building and operating CI/CD environments using Jenkins.
Experience in infrastructure automation using Terraform.
Experience using DevOps-related tools such as GitLab CI.
Experience in developing and operating systems in the financial or securities industry.

Benefits

Required Skills:

Responsibilities:

Analysis knowledge transfer and first- and second-level support for application development and operation and maintenance projects.
Modernization and code improvement of existing applications.
Development of new functions and extensions for existing systems.
Development of new applications.
Fault investigation and incident response for mission-critical systems.
Database design development and maintenance.
Utilization and operational support of related tools and infrastructure such as Jenkins Terraform GitLab CI and Linux scripting.

Requirements

The requirements we are looking for:

Experience in Java application development.
Experience in development using front-end frameworks such as React and Angular.
Experience in database development using MySQL Microsoft SQL Server (MSSQL) or Oracle.
Japanese: Advanced business level with the ability to conduct meetings independently presentations and negotiations with clients and internal stakeholders.
English: Fluent with the ability to communicate complex business issues accurately and smoothly both verbally and in writing.

Preferred Qualifications:

Practical experience with Linux scripting.
Experience in building and operating CI/CD environments using Jenkins.
Experience in infrastructure automation using Terraform.
Experience using DevOps-related tools such as GitLab CI.
Experience in developing and operating systems in the financial or securities industry.