Senior Site Reliability Engineer

Senior Site Reliability Engineer

New York City, NY

Hybrid Schedule (M/F remote, T/W/TH in-office)

East Coast Remote Considerations in FL, GA, MA, NJ, NY, NC, PA, SC, VA

At Magnite, we cultivate an environment of continuous growth and collaboration. Our work impacts what millions of people read, watch, and buy, and we’re looking for people to help us tackle that responsibility with creativity and focus. Magnite (NASDAQ: MGNI) is the world’s largest independent sell-side advertising platform. Publishers use our technology to monetize their content across all screens and formats including CTV / streaming, online video, display, and audio.

Our tech fuels billions of transactions per day!

The Site Reliability Engineering (SRE) team is a globally distributed group of approximately 25 engineers, dedicated to ensuring the reliability, scalability, and performance of our production systems. Spanning multiple time zones and regions, we operate as a cohesive unit that supports mission-critical infrastructure 24/7.

We sit at the intersection of software and systems engineering, partnering closely with application developers, infrastructure, security, and product teams. In addition to owning core reliability initiatives, we support the broader engineering organization by building shared tooling, defining best practices, and providing guidance on operational excellence.

Our work focuses on areas such as observability, automation, platform reliability, capacity planning, and incident response, with a strong emphasis on reducing toil and improving system resilience at scale.

We embrace and promote modern Dev Ops principles to deliver robust, scalable platforms. As a Principal SRE, you’ll join a senior group of peers who value ownership, technical leadership, collaboration, and a commitment to engineering excellence.

• Be a key member of the Technical Infrastructure, Engineering, and Operations (TIEO) organization
• Provide senior-level technical leadership, guidance, and mentorship across the broader Engineering organization
• Champion automation and standardization efforts to accelerate system deployment and reduce operational overhead
• Lead architectural reviews and contribute to the design of scalable, resilient, and observable systems
• Ensure the operational integrity, reliability, and performance of our global production infrastructure
• Design and implement scalable solutions to manage and monitor thousands of hosts and services efficiently
• Build and operate multi-tenant Kubernetes environments, with a focus on reliability, security, and performance
• Collaborate with platform teams that manage data infrastructure such as Hadoop and Kafka to ensure seamless integration and operational reliability
• Participate in a shared 24/7 on‑call rotation to support system availability and incident response

• A BA/BS degree in a technical discipline (or equivalent practical experience)
• 4+ years of experience deploying and managing infrastructure-as-code and configuration management tools such as Puppet, Ansible, or Terraform
• Proficiency with Git and modern version control practices, especially as they relate to continuous integration and delivery workflows
• Strong understanding of core Internet protocols and networking concepts, including TCP, DNS, and HTTP
• In‑depth experience designing, deploying, and maintaining Kubernetes infrastructure in distributed, high‑availability production environments
• Hands‑on experience with both cloud-based and on‑premises infrastructure, with a solid understanding of hybrid environments
• Familiarity with hypervisors and virtualization platforms such as KVM and VMware
• Experience architecting, implementing, and scaling CI/CD pipelines using tools such as Argo CD, Git Hub Actions, and Jenkins, with a focus on reliability, security, and developer experience
• Working knowledge of managing artifact repositories like AWS ECR, Nexus, or Yum
• Demonstrated ability to lead cross‑functional technical initiatives and drive alignment on infrastructure and reliability best practices
• Strong written and verbal communication skills, with a proven ability to collaborate…