Senior SRE, Site Reliability Engineer

<div class="content-intro"><p><em>At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you’re a close but not exact match with the description, we hope you’ll still consider applying. Want to learn more about life at Klaviyo? Visit <a class="_ymio1r31 _ypr0glyw _zcxs1o36 _mizu194a _1ah3dkaa _ra3xnqa1 _128mdkaa _1cvmnqa1 _4davt94y _4bfu18uv _1hms8stv _ajmmnqa1 _vchhusvi _kqswh2mm _ect4ttxp _syaz13af _1a3b18uv _4fpr8stv _5goinqa1 _f8pj13af _9oik18uv _1bnxglyw _jf4cnqa1 _30l313af _1nrm18uv _c2waglyw _1iohnqa1 _9h8h12zz _10531ra0 _1ien1ra0 _n0fx1ra0 _1vhv17z1" href="http://klaviyo.com/careers" data-renderer-mark="true">klaviyo.com/careers</a> to see how we empower creators to own their own destiny.</em></p></div><h2><strong>Senior Site Reliability Engineer – Site Reliability Engineering</strong><strong> </strong><strong>(Dublin)</strong></h2> <h3><strong>Team Overview</strong></h3> <p>As a senior Site Reliability engineer, you’ll ensure Klaviyo’s critical platforms are reliable, scalable, and sustainable while enabling rapid product development. We treat reliability as a core product feature and use software engineering to solve complex systems and operational challenges.</p> <p>Our work spans security, infrastructure, and software development, requiring us to understand systems and engineering. We build complex, foundational solutions that must be extremely reliable, secure, and performant at global scale.</p> <p>Our charter is to build and operate foundational services and infrastructure, define clear reliability objectives, reduce operational toil through automation, and continuously improve systems based on real production learnings. The work is highly visible and directly impacts how Klaviyos build software and how customers experience Klaviyo every day.</p> <h3><strong>How you’ll make an impact</strong></h3> <p>As a Senior Site Reliability Engineer, you will build and operate the platforms, systems, and services that underpin Klaviyo’s reliability and operational excellence. You will:</p> <ul> <li>Build and operate foundational, security-critical services with a strong emphasis on availability, scalability, latency, and fault tolerance</li> <li>Apply software engineering principles to automate infrastructure, reduce operational toil, and improve system reliability at scale</li> <li>Design, implement, and evolve systems using SRE best practices</li> <li>Define and refine SLIs, SLOs, and error budgets to guide engineering decisions</li> <li>Improve observability, alerting, and incident response to reduce mean time to detection and recovery</li> <li>Participate in on-call rotations with a focus on sustainable operations and automatic remediations </li> <li>Perform quantitative analysis to understand system behavior, capacity constraints, and scaling limits</li> <li>Identify systemic risks and reliability bottlenecks and drive long-term, preventative solutions</li> <li>Collaborate closely with product, platform, and security engineers to influence architecture early and ship reliable systems</li> <li>Mentor and pair with other engineers, helping raise the bar for reliability, operational maturity, and engineering excellence</li> </ul> <h3><strong>Who you are</strong></h3> <p>You are a cloud-native, platform-focused SRE who uses software to build and operate reliable production systems at scale.</p> <ul> <li>You write and maintain production-quality code (e.g. Python, Go, or similar) to build internal platforms, automate operations, and improve system reliability</li> <li>You have built, deployed, and operated distributed, cloud-native systems and understand failure modes such as partial outages, dependency failures, resource saturation, and cascading impact</li> <li>You have exper ... (truncated, view full listing at source)