Software Engineer II, Infrastructure SecurityDublin, IEAt 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 careers.klaviyo.com to see how we empower creators to own their own destiny.The Infrastructure Security team makes it simple and easy for engineers to make secure choices while developing world-class software at high speed. Security is built in by default—seamless and effortless—making engineers’ lives better and Klaviyo more secure.Our work sits at the intersection of security, infrastructure, and software engineering. We build cloud-native platforms and services that are reliable, secure, and performant at global scale, forming the foundation that Klaviyo engineers rely on every day.This role is for engineers who enjoy building modern distributed systems, care about security and reliability, and want to have real impact across a large engineering organization.How you’ll make an impactAs a Software Engineer on the Infrastructure Security team, you will build and operate the systems that help Klaviyo engineers ship secure software with confidence. You will:Design, build, and maintain cloud-native security services used across KlaviyoOwn meaningful components and services end to end, from implementation through production operationImprove the availability, scalability, latency, and efficiency of infrastructure security systemsCollaborate with senior engineers on system design and architecture, contributing ideas and technical solutionsIdentify performance, reliability, and security issues in distributed systems and drive improvementsWork extensively with technologies such as Python, Golang, AWS, Kubernetes, Terraform, and modern data storesParticipate actively in design reviews, code reviews, and whiteboarding sessionsContribute to operational excellence through monitoring, alerting, and incident responseParticipate in an on-call rotation with a focus on learning, prevention, and reducing operational toilBuild tooling, automation, and documentation that improve developer experience and security posturePartner with product-facing and platform engineers to ship impactful, secure solutionsWho you areYou have solid experience building and operating cloud-native, distributed systems in productionYou are comfortable writing production-quality code in a language such as Python or GoYou have hands-on experience with AWS (or a similar cloud provider) and understand managed services, networking, and IAM conceptsYou have experience working with containers and orchestration platforms such as KubernetesYou are comfortable owning services and features independently, while knowing when to ask for feedback or supportYou understand the fundamentals of scalable, multi-tenant architectures and secure system designYou care about reliability, performance, observability, and security—not just shipping featuresYou are comfortable participating in on-call and responding to production issuesYou communicate clearly, collaborate well, and enjoy working through technical problems as a teamYou regularly use modern developer tooling, including AI-powered tools, to improve productivity and code qualityNice to haveExperience building or integrating security-focused systems (e.g. secrets management, IAM, authn/z, policy enforcement)Familiarity with service meshes, API gateways, or zero-trust architecturesExperience improving performance in distributed systems or debugging complex multi-service workflowsKlaviyo’s platform is primarily built with Python and React and runs on AWS. Engineers join us from a wide range of technical backgrounds and are supported in learning our stack. Core technologies include:MySQL / Redis / MemcachedLocation & Work ModelThis role is based in Dublin, Ireland and follows a hybrid working model. Klaviyo supports work authorization and relocation for this position.At Klaviyo, we enjoy tackling meaningful engineering challenges and value people who take ownership, learn continuously, and collaborate openly. We are committed to building inclusive teams and encourage applications from candidates of all backgrounds.Klaviyo is committed to a policy of equal opportunity and non-discrimination. We do not discriminate on the basis of race, ethnicity, citizenship, national origin, color, religion or religious creed, age, sex (including pregnancy), gender identity, sexual orientation, physical or mental disability, veteran or active military status, marital status, criminal record, genetics, retaliation, sexual harassment or any other characteristic protected by applicable law.By clicking “Submit Application” you consent to Klaviyo processing your Personal Data in accordance with our Job Applicant Privacy Notice. If you do not wish for Klaviyo to process your Personal Data, please do not submit an application.
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