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    AC

    ACI Worldwide

    Financial Technology

    Sr Software Engineer

    Limerick, IrelandOn-SiteFull-time8+ yrs experiencePosted 3w ago
    All ACI Worldwide jobs

    Job description

    Position Summary

    We are seeking an experienced Senior Software Engineer to join the MTS Development team responsible for one of the industry's most critical high-value payments platforms. This role will focus on maintaining, enhancing, and modernizing core payment processing capabilities while supporting regulatory mandates, customer commitments, platform resiliency, and long-term product sustainability.

    The ideal candidate will be a strong software engineer with experience in complex enterprise applications, payment systems, mission-critical production support, and large-scale modernization initiatives.

    Key Responsibilities

    • Design, develop, and maintain core MTS platform capabilities.
    • Deliver customer and regulatory commitments including payment network mandates.
    • Participate in production issue resolution and root cause analysis.
    • Support modernization initiatives including 64-bit migration, ISO 20022, structured address, security, and platform enhancement programs.
    • Collaborate with Product Management, Professional Services, Quality Engineering, and Customer Support teams.
    • Act as a technical mentor and support knowledge transfer initiatives.
    • Drive engineering excellence through automation, testing, observability, and quality improvements.
    • Leverage AI-assisted engineering tools to improve productivity and code quality.

    Required Qualifications

    • 8+ years of software development experience.
    • Strong Java and enterprise application development experience.
    • Experience working with large-scale transaction processing platforms.
    • Experience debugging complex production issues.
    • Strong understanding of software architecture, integration patterns, APIs, and database technologies.
    • Experience with secure software development practices.
    • Excellent communication and collaboration skills.

    Preferred Qualifications

    • Payments industry experience (Fedwire, CHIPS, SWIFT, ISO 20022).
    • Experience supporting Tier-1 financial institutions.
    • Experience with cloud migration and modernization initiatives.
    • Knowledge of high-availability and mission-critical systems.
    • Experience using AI engineering tools such as Copilot, Cursor, Claude, or equivalent.

    Success Measures

    • Successful delivery of roadmap and mandate commitments.
    • Reduction in production incidents and resolution time.
    • Increased automated test coverage.
    • Effective knowledge transfer and documentation.
    • Contribution to long-term platform sustainability.

    Job details are sourced from the employer's original posting.

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    AC

    About the company

    ACI Worldwide

    ACI Worldwide is a global leader in mission-critical, real-time payment solutions.

    View all ACI Worldwide jobs
    Industry
    Financial Technology
    Open roles
    110

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