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Site Reliability Engineer 3

MongoDB
Dublin, Irelandfull_timePosted 18 Jun 2026

About the role

<p>MongoDB’s mission is to empower innovators to create, transform, and disrupt industries by unleashing the power of software and data. We enable organizations of all sizes to easily build, scale, and run modern applications by helping them modernize legacy workloads, embrace innovation, and unleash AI. Our industry-leading developer data platform, MongoDB Atlas, is the only globally distributed, multi-cloud database and is available in more than 115 regions across AWS, Google Cloud, and Microsoft Azure. Atlas allows customers to build and run applications anywhere—on premises, or across cloud providers. With offices worldwide and over 175,000 new developers signing up to use MongoDB every month, it’s no wonder that leading organizations, like Samsung and Toyota, trust MongoDB to build next-generation, AI-powered applications.</p> <p>The Site Reliability Engineering team designs and builds the global infrastructure on which we deploy our services, focusing on the above mentioned flagship MongoDB Atlas platform. As our customers grow and globalize, our services must satisfy demands for low-latency requests around the globe, and comply with various data sovereignty requirements. The SRE Team’s mission is to build this increasingly complex infrastructure, while continually lowering the operational burden associated with it, and increasing our internal visibility into the health of the system. We are strong believers in infrastructure-as-code and self-healing systems. The SRE Team is fully integrated with all the other engineering teams, and the teams work closely together with a soft and traversable boundary between their areas of responsibility.</p> <p>We are looking to speak to candidates who are based in Dublin for our hybrid working model.</p> <h3>Responsibilities</h3> <ul> <li>Design and build the infrastructure for a global cloud service that comprises hundreds of thousands of MongoDB clusters, processes a billion metrics per day, and replicates tens of billions of database writes to our backup service</li> <li>Design, implement, and troubleshoot the automation and monitoring of services that seamlessly spans the globe - including several cloud providers</li> <li>Become an expert in infrastructure performance, helping us optimize from the application level all the way through the firmware</li> <li>Build for resilience. Our goal is that nobody’s pager goes off, ever. Are we there yet? No. Are we really close? Very. While we work on that - participate in a weekly on-call rotation</li> <li>Improve our infrastructure capabilities, optimizing for cost, simplicity, and maintainability</li> </ul> <h3>Requirements</h3> <ul> <li>3+ years of experience running a mission critical service at scale in a Linux environment</li> <li>Firm grasp of at least one modern programming language, beyond basic scri

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MongoDB

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