Site Reliability Engineer

About WPP Media WPP is the trusted growth partner for the world’s leading brands. With exceptional talent, trusted data and intelligence, and world-class partnerships – all united by our pioneering agentic marketing platform, WPP Open – we help clients navigate change, capture opportunity, and deliver transformational growth.  WPP Media is WPP's AI-driven media operating unit, bringing together media, data, and partnerships to deliver creative personalisation at scale. Connected through WPP Open and powered by Open Intelligence, clients see exactly where, how, and why their media investment is working. For more information, visit wppmedia.com . Role Summary and Impact This role is within WPP Media, where you will be instrumental in owning production stability, observability, and system health for a mission-critical global campaign governance and compliance platform. As a Site Reliability Engineer, you will operate and improve a system running natively on Google Cloud Platform (GCP). You will investigate complex production issues, implement minor code-level fixes in Python, lead root cause analysis, and improve the reliability of distributed systems. Working closely with the EMEA-based Engineering Tech Lead, Product Owner, and Quality Assurance partners, you will connect production insights with technical roadmap priorities. The opportunity combines hands-on Site Reliability Engineering (SRE) with technical squad leadership. There's an initial monitoring setup to build from, but it's a great opportunity to evaluate what exists, form your own point of view, and define where observability needs to go. From there, you'll shape the future support squad for a dedicated product used across global advertising campaigns, while also owning advanced L2+ and L3-oriented support, incident response, and the service-level and business-as-usual work that keeps the system running. Key Responsibilities • Own production stability, system health, and observability for a mission-critical campaign governance and compliance platform running on GCP. • Define and advance the observability strategy using GCP Cloud Logging, Cloud Monitoring, Error Reporting, Prometheus, PromQL, and suitable service level indicators and objectives. • Lead incident response, post-incident reviews, and end-to-end root cause analysis, partnering with the EMEA Engineering team on permanent remediation. • Diagnose and resolve complex, intermittent, and high-priority incidents across application, database, infrastructure, and networking layers. • Read, debug, and implement minor fixes and patches directly within the existing Python production codebase. • Monitor execution flows, performance, data refreshes, automated checks, and recurring compliance reporting to ensure reliable system operation. • Identify opportunities to automate manual support activity, develop and maintain runbooks, and reduce operational toil. • Provide technical leadership to the L2+ support squad through coaching, knowledge sharing, prioritization, and effective handovers. • Partner with Product, Engineering, and Quality Assurance teams to assess operational risk, improve release and change management, and influence technical roadmap decisions. Skills and Experience • Advanced education in computer science, software engineering, information technology, or a related technical discipline, or equivalent practical experience. • 7+ years of experience in site reliability engineering, DevOps, or infrastructure/platform engineering roles, including meaningful experience operating and troubleshooting production systems at scale. • Deep, hands-on experience supporting enterprise systems on Google Cloud Platform, including Compute Engine, Google Kubernetes Engine, Cloud SQL, BigQuery, Pub/Sub, Fir