Senior Platform Engineer

19109 SPEEDPAY RD; Munster; On-site; EUR 90,000 - 130,000; Full time

Job summary

ACI Worldwide in Limerick, Ireland, is seeking a Senior Platform Engineer to own a cloud-native platform domain, spanning Kubernetes/OpenShift, CI/CD, and observability. You will shape architecture, reliability, and roadmap, serving multiple product teams end-to-end.

You will lead the design of golden-path tooling, set reliability targets, mentor engineers, and drive automation to reduce toil in a regulated payments environment. This role emphasizes hands-on Gen AI infra and IaC excellence.

Qualifications

• Experience building cloud-native platforms and multi-tenant services.
• Strong expertise in Kubernetes/OpenShift and autoscaling.
• Proficiency with Terraform or similar IaC tools.
• Ability to set reliability targets and lead incident response.

Responsibilities

• Own a platform domain end to end (e.g., CI/CD, observability, or cloud infrastructure) – architecture, reliability, and roadmap.
• Architect resilient, multi-tenant platform services within your domain.
• Lead design and implementation of golden-path tooling and measure impact on developer productivity.
• Set reliability targets and lead incident response and postmortems.
• Mentor platform engineers and associates and lead design reviews.

Skills

Gen AI infra

Kubernetes/OpenShift

Terraform

CI/CD

Observability

Security & compliance

Tools

Kubernetes

OpenShift

Job description

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

This purpose of this Senior Platform Engineer is:

ACI's Internal Developer Platform is the foundation every product and delivery team builds on - cloud-native infrastructure spanning Kubernetes/OpenShift and multiple cloud providers, CI/CD, observability, and the golden paths that let engineers ship payment software quickly and safely. As Sr Platform Engineer, you'll own a platform domain end-to-end - architecture, reliability, and roadmap - and be the technical authority other engineers turn to within that domain.

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

• Own a platform domain end to end (e.g., CI/CD, observability, or cloud infrastructure) - architecture, reliability, and roadmap for that domain
• Architect resilient, multi-tenant platform services within your domain, balancing portability against deep cloud-provider leverage
• Lead the design and implementation of golden-path tooling in your domain, and measure its real impact on developer productivity, not just its existence
• Set reliability targets and error budgets for the services in your domain, and lead incident response and blameless postmortems when things break
• Architect AI-ready infrastructure within your domain - GPU/inference capacity, model-serving, or vector infrastructure - as a first-class capability
• Champion AI-assisted engineering practices within your domain, building AI-assisted tooling into the golden paths you own
• Design and enforce security and compliance controls (policy-as-code, tenant isolation) within your domain for a regulated payments environment
• Mentor platform engineers and associates, and lead design reviews for your domain
• Represent your domain's technical perspective to other platform teams and stakeholders, and resolve conflicts through technical reasoning
• Drive systematic reduction of toil and defects in your domain through automation
• Perform other duties as assigned
• Understand and adhere to all corporate policies to include but not limited to the ACI Code of Business Conduct and Ethics.

As a Senior Platform Engineer at ACI, you will work with the below Tech Stack:

• Gen AI infrastructure - hands-on experience with model-serving infrastructure and vector databases within your domain
• Container orchestration - strong, hands-on expertise with Kubernetes/OpenShift, including autoscaling and operator patterns
• Infrastructure as code - strong Terraform (or equivalent) expertise, including module