Senior SRE Lead: Observability & Scale

Mastercard; Malahide; On-site; EUR 120,000 - 160,000; Full time

Job summary

Mastercard in Ireland is seeking an experienced Lead Site Reliability Engineer to own the reliability of our Payments Network infrastructure. You will lead end-to-end incident management, capacity planning, and automation efforts to ensure scalable, secure services for our global customers.

You'll collaborate with Product and Development teams, implement observability strategies, and drive RCA actions to prevent recurrences, with a focus on performance, resilience, and operational excellence.

Qualifications

• 5-10 years of experience in an SRE or SRE-related operations role.
• 3+ years supporting e-commerce, financial services, or large-scale SaaS platforms.
• Excellent infrastructure troubleshooting and analytical problem solving skills.
• Strong hands-on experience with observability and monitoring tools such as Splunk or Dynatrace.
• Familiarity with network telemetry tools and traffic analysis.
• Proficiency with automation and IaC tools (Terraform, Chef, Ansible) and data formats (JSON/YAML).

Responsibilities

• Lead continuous assessments of the application infrastructure and forecast growth requirements for scalability and resiliency.
• Champion observability and design strategies to close monitoring gaps with unified telemetry.
• Lead incident reviews to identify root causes and mitigate risks.
• Leverage automation and AI to enhance proactive issue detection and self-healing capabilities.
• Develop testing and validation plans for new environments and DR exercises.
• Promote learning and knowledge sharing across networking and infrastructure teams.

Skills

Observability

Incident management

Networking & infra

Infra as Code

Root cause analysis

Cross-functional leadership

Tools

Splunk

Dynatrace

Prometheus

Grafana

OpenTelemetry

Terraform

Ansible

Chef

Job description

Mastercard in Ireland is seeking an experienced Lead Site Reliability Engineer to own the reliability of our Payments Network infrastructure. You will lead end-to-end incident management, capacity planning, and automation efforts to ensure scalable, secure services for our global customers.

You'll collaborate with Product and Development teams, implement observability strategies, and drive RCA actions to prevent recurrences, with a focus on performance, resilience, and operational excellence.