Principal Platform Engineer

Powering the world’s payments ecosystem

ACI powers the payments ecosystem – globally, and you power ACI.  You’ll innovate, collaborate, and grow – in an energetic technology culture with decades of proven success.  ACIers – in all roles and levels – are truly your colleagues and many are your friends. Our size and reach allow you to see the global impact of your work. You are visible, your talents are valued, and you are empowered to shape the future of payments.

As a Principal Platform Engineer in Limerick, Ireland you will join a diverse, passionate team, dedicated to powering the world’s payments ecosystem!

The purpose of the Principal Platform Engineer is:

ACI Worldwide is seeking a Principal Platform/Software Engineer to help shape and scale the platform capabilities behind our global payments technology. This is an opportunity for a senior technical leader to work at the intersection of cloud infrastructure, platform engineering, automation, and DevSecOps, while influencing architecture, improving developer experience, and enabling secure, resilient systems that operate at scale.

As a Principal Platform/Software Engineer, you will lead the design and evolution of the platform infrastructure that underpins our payments technology. You will work closely with engineering, operations, and security teams to build secure, scalable, and highly reliable systems, while helping define technical direction, raise engineering standards, and create platform capabilities that make it easier for teams to deliver high-quality software. This role is well suited to an engineer who combines deep technical expertise in Azure and/or AWS with a strong platform mindset and a passion for solving complex problems through automation, reliability, and continuous improvement.

A typical day at ACI for a Principal Platform Engineer is:

• Lead the design, development, and continuous improvement of secure software build, release, and delivery pipelines that improve speed, consistency, and reliability across engineering teams.
• Define and implement infrastructure as code practices using tools such as Pulumi, Terraform, Ansible, or similar technologies to create scalable, maintainable platform foundations.
• Drive DevSecOps capabilities that strengthen security, compliance, and operational resilience throughout the software development lifecycle.
• Partner with development, operations, and security teams to embed automation, governance, and secure engineering practices into everyday platform workflows.
• Provide technical leadership on infrastructure, deployment, reliability, and performance challenges, including root-cause analysis and long-term architectural improvements.
• Contribute to platform strategy, engineering standards, and mentoring across teams to improve scalability, developer productivity, and service quality.

Knowledge, Skills and Experience and Experience needed to succeed in this role:

• Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
• Significant professional experience in software engineering, including experience operating at a senior or principal level.
• Strong experience with cloud platforms such as Azure and/or AWS.
• Proven experience with infrastructure as code and configuration management tools such as Pulumi, Terraform, Ansible, or similar.
• Hands-on experience with DevSecOps practices, automation, and secure software delivery.
• Strong problem-solving skills, sound technical judgment, and the ability to work independently while collaborating effectively across teams.
• Excellent communication skills, with the ability to influence technical decisions and work effectively with cross-functional stakeholders.

Preferred knowledge, Skills and Experience and Experience needed to succeed in this role:

• Experience with templating and packaging tools such as Carvel, Jinja, and Helm.

• Experience programming in Go; candidates with strong Java or Python backgrounds and a demonstrated ability to learn quickly will also be considered.

• Experience working in payments, regulated environments, or other domains where security, resilience, and compliance are critical.

Core Capabilities:

We seek colleagues who embody our core capabilities — these shape our culture and enable us to make a meaningful impact together:

• Ensure Accountability: holding self and others accountable to meet commitments.

• Drives Results: consistently achieving results, even under tough circumstances.

• Customer Focus: building strong customer relationships and delivering customer-centric solutions.

• Cultivate Innovation: creating new and better ways for the organization to be successful.

• Collaborates: building partnerships and working collaboratively with others.

• Courage: stepping up to address difficult issues, saying what needs to be said.

Applicants must be currently authorized to work in Ireland on a full-time basis. This position does not offer sponsorship for employment visa status or work permit now or in the future.

In return for your expertise, we offer opportunities for growth, career development, and a competitive compensation and benefits package—all within an innovative and collaborative work environment.

Are you ready to help us transform the payments ecosystem? To learn more about ACI Worldwide, visit our web site at www.aciworldwide.com

ACI Worldwide is an AA/EEO employer in the United States, which includes providing equal opportunity for protected veterans and individuals with disabilities, and an EEO employer globally.

Important Notice About Recruitment Scams
Job seekers should be aware of ongoing recruitment scams where individuals or organizations impersonate legitimate companies to offer fake job opportunities. These scams often involve requests for personal information, payments, or interviews through unofficial channels. Please be cautious and verify any communications claiming to be from our company (www.aciworldwide.com / @aciworldwide.com). The ACI Worldwide recruitment team will always follow official channels and will never request payment.

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