Lead SRE: HP NonStop Payments Reliability

Mastercard Inc.; Malahide; On-site; EUR 120,000 - 180,000; Full time

Job summary

Mastercard Inc. is seeking a Lead Site Reliability Engineer with deep HP NonStop expertise to ensure reliability of real-time payment platforms globally.

You will own availability, latency and resilience, define SLOs/SLIs, and lead incident command for major production events across engineering, infrastructure and security teams. You will mentor engineers, drive automation to reduce toil, and partner with product and payments teams to embed reliability into design and release processes.

Qualifications

• Strong hands-on experience with HP NonStop (Tandem) platforms.
• Deep knowledge of NonStop OS, Pathway, TMF, EMS, OSS, TACL, and diagnostic tooling.
• Experience supporting high-throughput, low-latency, real-time transaction systems.
• Proven ownership of production reliability in 24x7 environments.

Responsibilities

• Own availability, performance, latency, and resilience of payment platforms running on HP NonStop (Tandem).
• Define and enforce SLOs, SLIs, and error budgets for mission‑critical payment services.
• Proactively identify reliability risks and drive corrective and preventive actions.
• Act as a lead incident commander for high‑severity production incidents.
• Drive rapid triage, mitigation, and resolution across application, platform, and infrastructure layers.
• Lead blameless post‑incident reviews with strong root‑cause analysis.
• Reduce toil by driving automation across monitoring, diagnostics, deployment, and recovery workflows on HP NonStop platforms.
• Partner with engineering teams to improve operability, observability, and failure handling.
• Support modernisation initiatives while ensuring PCI, security, and compliance requirements are met.
• Lead release readiness and production validation for changes impacting payment switching platforms.
• Define rollback, failover, and recovery strategies to minimise customer impact.
• Own participation in DR testing, BCP exercises, and site‑resilience planning for Payment Networks.
• Ensure deep operational understanding of payments transaction flows, including real‑time transaction switching, debit, ATM, POS, and network routing behaviour.
• Partner with product and engineering teams to ensure reliability considerations are embedded early in design.
• Provide technical leadership and mentoring to SREs and operations engineers.
• Set standards for runbooks, monitoring quality, alert hygiene, and operational excellence.
• Influence reliability strategy and priorities at a programme and domain level.

Skills

HP NonStop

NonStop OS/Pathway/EMS

Incident management

SRE leadership

Payments domain knowledge

Observability/monitoring

Cross-functional collaboration

Tools

Pathway

TMF

EMS

TACL

OSS

Job description

Mastercard Inc. is seeking a Lead Site Reliability Engineer with deep HP NonStop expertise to ensure reliability of real-time payment platforms globally.

You will own availability, latency and resilience, define SLOs/SLIs, and lead incident command for major production events across engineering, infrastructure and security teams. You will mentor engineers, drive automation to reduce toil, and partner with product and payments teams to embed reliability into design and release processes.