Senior Software Engineer (MEPS+) (Perm/Contract)

Monetary Authority of Singapore (MAS); Singapore; On-site; SGD 85,000 - 120,000; Full time

Job summary

Monetary Authority of Singapore (MAS) is seeking a Software Engineer to join the CBD payment team, ensuring MEPS+ reliability and quality. You will focus on code review, security validation, and test automation across payments processing systems.

You will drive automation, conduct release verification, and contribute to incident response with vendors, operations teams, and security peers. This role suits a detail‑oriented troubleshooter committed to robust financial tech.

Qualifications

• Proven experience designing and implementing Java applications with strong SQL skills.
• Hands-on experience with automated testing frameworks (Selenium, Watermelon) and test automation.
• Experience supporting production systems and debugging complex issues.
• Understanding of secure coding practices and vulnerability assessment.
• Familiarity with J2EE, JBoss EAP, and Oracle SQL databases.

Responsibilities

• Code Review Gate: review fixes against designs, document findings, and advise remediation.
• Lead weekly security findings review and validate remediation.
• Validate technical solutions meet design, performance, and security needs.
• Develop contingency exercises and support audit responses.
• Maintain and enhance MEPS+ test automation scripts and run release verifications.
• Define SLIs/SLOs with Ops and SRE, and participate in incident response.

Skills

Java development

SQL

Shell scripting

Test automation

Docker

Kubernetes

Code review

Security awareness

Education

Bachelor's degree in Computer Science or related field

Tools

Selenium

Watermelon

Git

J2EE

JBoss EAP

Oracle SQL

Docker

Kubernetes

Job description

What the role is

You will join the Central Banking & Devt Platforms (CBD) payment team as a Software Engineer responsible for ensuring technical quality and operational reliability of the MAS Electronic Payment System (MEPS+) and related payment processing systems.

The role focuses on code review, assessment and validation of security findings, oversight of test automation, enhancement-release verification, audit support and contingency preparedness.

What you will be working on

What You Will Be Responsible For

A. Code Review & Quality Assurance

• Code Review Gate: Conduct code reviews of internal and vendor enhancements/fixes. Review fixes and enhancements against approved designs and applicable quality and security standards, document findings, and recommend acceptance or remediation in accordance with the agreed governance process
• Security & Scan Validation: Lead weekly review of code scan findings (static analysis, security scanning). Assess impact; identify false positives; validate fixes. Review security findings from source code reviews and penetration tests; validate remediation.
• Technical Solution Review: Validate that technical solutions for new enhancements meet approved design, performance, and security requirements.
• Compliance and Contingency Planning: Develop Software Engineer task lists for contingency exercises and participate in the execution of relevant drills. Prepare and provide relevant technical information and evidence in response to audit requests.

B. Testing & Test Automation

• Test Automation Maintenance: Maintain and enhance MEPS+ test automation scripts (Selenium/Watermelon). Revamp test suites as needed; add new test coverage; troubleshoot test failures; evolve automation framework.
• Release Verification: Verify MEPS+ enhancement releases (semi-annual) before production deployment.
• SLI/SLO Contribution: Work with operations and SRE to define system SLIs and SLOs (e.g., transaction latency, error rate, availability targets).

C. Production Troubleshooting & Incident Response

• L2 Production Incident Response: Respond to production incidents. Investigate errors, exceptions, alerts, and system warnings. Troubleshoot issues; coordinate with vendors on urgent fixes; elevate when needed. Expected on-call rotation: [specify, e.g., 1 week per month].
• Error & Exception Analysis: Diagnose root causes of production issues. Provide detailed incident analysis; recommend fixes or escalation path.
• Post-Incident Review: Participate in post-incident reviews; capture learnings; recommend process improvements.

D. Technical Specifications & Standards

• Code Quality Standards: Contribute to defining code review standards, testing requirements, and quality metrics for MEPS+.

What we are looking for

What We Are Looking For

Core Technical Requirements

• Backend Development & Code Review: Proven experience designing and implementing Java applications. Strong Java, SQL, and shell scripting skills. Comfortable conducting code reviews against design specifications and security standards.
• Automated Testing: Hands-on experience with automated testing frameworks (Selenium, Watermelon, or similar). Understanding of testing strategies (unit, integration, functional, performance, security). Experience maintaining and evolving test automation frameworks.
• Production Support & Troubleshooting: Experience supporting production systems. Strong debugging and root-cause analysis skills.
• Security & Code Quality: Understanding of secure coding practices. Familiarity with code scanning tools and vulnerability assessment. Ability to evaluate and validate security findings.
• Enterprise Technologies: Hands-on experience with J2EE, JBoss EAP, SQL/Oracle Database, Git, shell scripting.

Important Experience

• Experience working on-call for production systems, incident triage and escalation.
• Experience defining and enforcing quality standards with strong testing discipline.
• Experience working with development teams, vendors, operations, Managing and prioritizing tasks.
• Experience with payment processing, securities settlement, or related financial systems.
• Familiarity with large-scale payment systems architecture and integration patterns.
• Understanding of modern backend architectures and API design principles.
• Familiarity with Docker and Kubernetes concepts
• Java Developer, AWS, or related certifications would be an advantage

Who You Are

• Detail-Oriented: Meticulous about code quality, test coverage, and production reliability. Comfortable with rigorous standards.
• Problem-Solver: Natural investigator; thrives in debugging complex issues. Comfortable with ambiguity; persistent troubleshooter.
• Reliable & Responsive: Dependable on-call engineer; comfortable responding to urgent production issues at any time.
• Collaborative: Strong communication with peers, vendors, and operations teams. Comfortable escalating issues and coordinating fixes.
• Driven by Quality: Intrinsically motivated to maintain high technical and operational standards. Takes pride in robust systems.

Candidates may be considered for a permanent or 2-year contract roles. All applicants will be notified on whether they are shortlisted or not within 4 weeks of the closing date of this job posting.

As part of the shortlisting process for this role, you may be required to complete a medical declaration and/or undergo further assessment.