Senior Site Reliability Engineer, Ads

Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 130 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit www.redditinc.com.

The Ads organization powers Reddit's advertising platform, enabling advertisers to reach highly engaged communities while helping Reddit grow its business. The reliability of our Ads systems directly impacts advertiser success, revenue generation, and user experience.

The Ads Reliability team partners closely with Ads Engineering to improve reliability, scalability, operational excellence, and developer productivity across Reddit’s advertising ecosystem. We help build and operate highly available services that drive revenue and maintain advertiser trust. We’re looking for a Senior Site Reliability Engineer to build, operate, and scale the critical systems behind Reddit Ads.

What you’ll do:

• Partner with Ads Engineering teams to improve reliability, scalability, and operational excellence of ad-serving, auction, targeting, measurement, and billing systems.
• Design, build, and maintain infrastructure, tooling, and automation that improve service reliability and engineering productivity.
• Improve observability through monitoring, alerting, tracing, logging, and dashboards.
• Participate in on-call rotations and lead incident response efforts for critical production systems.
• Run root cause analysis and drive corrective actions following incidents.
• Collaborate with software engineers throughout the service lifecycle, from design reviews through production operations.
• Drive adoption of SRE best practices including SLIs, SLOs, error budgets, capacity planning, and operational readiness reviews.
• Reduce operational toil through automation and self-service tooling.
• Help define and measure advertiser-critical user journeys such as campaign creation, ad delivery, rep