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 126 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit www.redditinc.com. Location: Reddit has a flexible first workforce. Don't live near our office? No worries: you can work remotely from anywhere in the UK, the Netherlands or Ireland. 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. Responsibilities: 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, reporting, and billing. Scale Ads systems to support continued traffic growth, increased advertiser demand, and evolving business requirements. Required Qualifications: 5+ years of experience in Site Reliability Engineering, Infrastructure Engineering, or related roles operating large scale distributed systems. Strong experience supporting high traffic, user facing production environments. Good understanding of distributed systems, networking, Linux systems, cloud native architectures. Good programming skills in languages such as Go, Python, or similar. Demonstrated ability to troubleshoot complex issues across applications, infrastructure, networking, and services. Experience with observability platforms, monitoring systems, alerting, and incident response. Experience driving automation and operational improvements. Benefits: Global Benefit programs that fit your lifestyle, from workspace to professional development to caregiving support Family Planning Support Gender-Affirming Care Mental Health & Coaching Benefits Private Pension plan with Employer-matching 100% employer-sponsored group medical plan Income Replacement Programs Flexible Vacation & Paid Volunteer Time Off Generous Paid Parental Leave In select roles and locations, the interviews will be recorded, transcribed and summarized by artificial intelligence (AI). You will have the opportunity to opt out of recording, transcription and summarization prior to any scheduled interviews. During the interview, we will collect the following categories of personal information: Identifiers, Professional and Employment-Related Information, Sensory Information (audio/video recording), and any other categories of personal information you choose to share with us. We will use this information to evaluate your application for employment or an independent contractor role, as applicable. We will not sell your personal information or disclose it to any third party for their marketing purposes. We will delete any recording of your interview promptly after making a hiring decision. For more information about how we will handle your personal information, including our retention of it, please refer to our Candidate Privacy Policy for Potential Employees and Contractors. Reddit is proud to be an equal opportunity employer, and is committed to building a workforce representative of the diverse communities we serve. Reddit is committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. If, due to a disability, you need an accommodation during the interview process, please let your recruiter know.