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MetLife

# Core Systems Software Engineer I

Software Engineering 

Listed on MetLife’s official careers site. Listed as of October 18, 2026. Check that it is still open and apply there.
[Apply on MetLife’s careers site →](https://www.metlifecareers.com/en_US/ml/JobDetail/Core-Systems-Software-Engineer-I/20814)

[OpenNash Jobs](https://jobs.opennash.com/) / [MetLife](https://jobs.opennash.com/companies/metlife/) / Core Systems Software Engineer I

## Job description

Description and Requirements Core Systems Software Engineer Role Description MetLife is seeking a Core System s Software Engineer responsible for developing and maintaining insurance business systems built on mainframe platforms. This position plays a critical role in ensuring stable operations of existing systems while driving new product development and modernization of development environments and processes. You will be engaged in design, development, and operations based on business requirements and interacting closely with delivery teams across Japan, Malaysia a nd India.

This is an opportunity to be involved in the modernization of critical platforms that will positively impact the lives of millions.

### Key Responsibilities

Leverage AI-assisted development tools to improve code quality, automate testing, accelerate documentation, and support troubleshooting activities
- Identify and apply AI-driven opportunities to enhance modernization initiatives, knowledge discovery, system analysis, and operational efficiency
- Design, develop, test, and maintain mainframe applications
- Analyse and design to translate business requirements into system specifications
- Improve performance of batch and online processing, handle incidents, and perform root cause analysis
- Manage application changes, create release plans, and prepare operational manuals
- Conduct technical evaluations and implementations for modernization initiatives (e.g., development support tools, test automation, CI/CD)
- Ensure design and operations comply with security and regulatory requirements Candidate

### Qualifications and Skills
- Bachelor’s degree or equivalent
- 3+ years of software development experience with preference given to candidates with prior exposure to mainframe environment (COBOL, JCL, DB2, etc.) Experience in integrating mainframe solutions with modern open standards platforms Experience in system development with in companies operating in the regulated financial industry space desirable
- Strong problem-solving, analytical, and collaboration skills Expertise in mainframe technologies (COBOL, JCL, VSAM, DB2) desirable
- Design and tuning of batch and online processing Assembler skills preferred Understanding and practical experience in Agile development preferred Practical experience using AI-assisted development tools to improve coding, testing, documentation, and troubleshooting productivity
- Ability to evaluate and apply AI solutions for test automation, code analysis, knowledge discovery, and modernization support English proficiency required, Business-level Japanese optional Tech Stack: Java, JavaScript, COBOL, JCL, DB2 Development management tools: Mainframe, Azure Boards, Azure DevOps GitHub Enterprise, GitHub Copilot, GitHub Adv anced Security

## At a glance
- Posted by the employer: Not stated
- First seen by OpenNash: Oct 11, 2026
- Last checked: Oct 18, 2026
- Listed for: 7 days[Apply on MetLife’s careers site →](https://www.metlifecareers.com/en_US/ml/JobDetail/Core-Systems-Software-Engineer-I/20814)

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