Senior Site Reliability Engineer

You will join our global team in Sunnyvale and help operate financial platforms at scale. You will partner with cross-functional teams to improve reliability, automate operations, and drive continuous improvement across our cloud-native environments.

What you will do:

• Design, build and maintain automation to eliminate manual, repetitive operational tasks (runbooks, deployment pipelines, remediation scripts).
• Operate and enhance monitoring, logging and alerting systems to ensure strong observability across services.
• Participate in on-call rotations and lead incident response activities; run and document post-incident RCA and follow-up actions.
• Collaborate with stakeholders to define SLIs and SLOs, manage error budgets and translate reliability goals into measurable actions.
• Forecast capacity needs and contribute to resource planning to ensure performance and cost-efficiency.
• Troubleshoot production issues: deep-dive analysis, isolate root causes and implement durable fixes.
• Drive continuous improvement and platform hardening through runbook improvements, automation, and best-practice adoption.
• Work closely as part of an international team to deliver project outcomes and operational excellence.

• Solid practical experience in site reliability, operations or DevOps at a mid-to-senior level.
• Strong shell scripting skills and a foundation in programming concepts.
• Hands-on experience with cloud workloads-specifically Google Cloud Platform (GCP) and GKE.
• Proven experience with containerisation and orchestration (Kubernetes).
• Working knowledge of Infrastructure as Code and configuration management (Terraform, Ansible, Puppet).
• Familiarity with monitoring and observability tooling such as Prometheus, Grafana and Datadog.
• In-depth understanding of HTTP(s) traffic, routing and load-balancing, with practical experience observing and operating HAProxy.
• Comfortable using GitHub and GitHub Actions for code management, automation and IaC pipelines.
• Strong troubleshooting skills, a pragmatic problem-solving approach and effective communication for cross-team collaboration.

What would be great to have:

• Experience programming in Python, Go or Java.
• Exposure to large-scale financial services platforms or highly regulated environments.
• Experience defining SLIs/SLOs and managing error budgets in production environments.

We’re Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants and consumers to one another millions of times a day - quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we’re involved. If you want to make an impact on a global scale, come make a difference at Fiserv.