Dublin · On-site · Full-time · 39h/week
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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 klaviyo.com/careers to see how we empower creators to own their own destiny.
Klaviyo is a leading marketing automation platform that helps businesses grow by delivering personalized experiences. Our mission is to empower creators to own their destiny. We believe in providing an exceptional developer experience that enables our engineering teams to build and ship high-quality software efficiently and with confidence.
The Messaging Infra organization at Klaviyo is focused on high-growth customer engagement through various messaging channels (email, SMS/MMS/RCS, mobile push, WhatsApp, and more). We work with multiple stakeholders to provide best-in-class service and reliability to connect a wide range of businesses, from entrepreneurs to enterprises, with their end users. The messaging platform is a mission-critical system, responsible for delivering billions of messages, and must be architected for massive scale and reliability.
How You Will Make a Difference
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Build and scale highly-available, low-latency, high-throughput, event-driven services that process live messaging events across one or more channels.
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Work on Klaviyo's real-time messaging pipeline, processing and delivering hundreds of millions of messages daily and growing to billions scale.
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Design and implement backend services that handle real-time traffic and asynchronous processing, working with queues, streams and messaging systems to process large volumes of events reliably.
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Contribute to highly-scalable, highly-available services across the messaging pipeline, developing solutions to problems involving throughput, latency, performance and reliability.
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Collaborate radically with teams and stakeholders across Klaviyo on designs, implementations, and engineering practices.
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Learn new technologies, bring them to the team and apply them to evolve our systems to the next level.
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Help us improve our experimentation and development processes, and mentor other engineers on the team.
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Participate in the technical interview process to help maintain a high bar for our growing teams.
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Contribute to the company as a subject matter expert, constantly pushing yourself to be a better engineer and to level up all of your peers within your team and within Klaviyo.
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Have 4+ years of experience in a software engineering discipline and have architected, built and delivered at least one complex production system at scale.
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Experience building and operating online, real-time systems that process live requests, events or messages, with a strong understanding of the importance of latency, throughput, availability and reliable processing.
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Experience working with event-driven or asynchronous architectures, such as systems built around queues, streams, events or messaging patterns.
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Experience working with streaming or message-queue platforms such as Kafka, Pulsar, RabbitMQ, SQS, or similar.
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Experience with large-scale system architecture, technologies and patterns. Have a good understanding of their pros/cons and use scenarios, able to apply them to system design by making appropriate tradeoffs to meet business needs.
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Deep fluency in at least one backend language (Python, Go, Java, Scala, or similar) and comfort navigating large, complex codebases.
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Love digging into performance and scalability issues to drive breakthrough solutions -- whether it's a performance degradation, a database query timing out, or a queue that just won’t drain. You recognize all problems can be solved.
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Passionate about growing and improving a product daily using a data driven mindset, familiar with system monitoring and alerting techniques.
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Proven experience with being a coach and a mentor for team members and helping them grow.
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Like working on small, high-performing autonomous agile teams. At Klaviyo, you will have ownership of features, but you'll collaborate radically with everyone to make sure we produce the right solution.
Languages & Frameworks: Python, Django, React
Data & Infrastructure: MySQL, Redis, Memcached, Apache Zookeeper, Apache Pulsar
Cloud & DevOps: AWS (EC2, RDS, Aurora), Terraform, Jenkins
This 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 growing fast and we have openings for all skill levels across all of our teams. Learn more about our engineering culture at https://klaviyo.tech
Our salary range reflects the cost of labour in the country where the job post is advertised. The base salary offered for this position is determined by several factors, including the applicant’s job-related skills, relevant experience, education or training, and work location.
In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility.
Your recruiter can provide more details about the specific salary/OTE range for your preferred location during the hiring process.
Base Pay Range…
Klaviyo
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