Software Engineer II, Platform Engineering

Klaviyo Inc.; Dublin; On-site; EUR 90,000 - 140,000; Full time

Job summary

Klaviyo is seeking a Platform Engineer to build foundational services that empower product teams to move faster while controlling infrastructure costs. You will contribute to core platform services, enhance developer experience, and help shape the tooling and guidance for scalable deployments.

The role focuses on designing scalable platform primitives, leveraging Python/Go, AWS, and Kubernetes, and partnering with engineers to optimize performance, reliability, and cost efficiency across

Qualifications

• BA/BS in Computer Science or equivalent experience.
• 3+ years operating and scaling distributed systems.
• Experience in cloud-native environments.
• Proven Python and/or Go development experience.
• Fundamental Linux and networking knowledge.
• Familiarity with Kubernetes, infrastructure as code, API gateways & traffic management, observability, or async tooling.

Responsibilities

• Ship foundational platform services to improve engineering speed and confidence.
• Design and develop platform primitives (Infra, Databases, Queuing) aligned with platform vision.
• Build systems to improve availability, scalability, latency, and cost efficiency of core platforms.
• Collaborate with engineers to enhance performance, self-healing capabilities, and cost optimization.

Skills

Python

Go

Linux

Cloud-native

Kubernetes

Observability

Cost optimization

Data processing

OLTP/OLAP

Asynchronous processing

Education

BA/BS in Computer Science

Tools

Terraform

ClickHouse

DynamoDB

MySQL

Kafka

Spark

Flink

Airflow

Job description

Dublin, IE

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 destiny.

The mission of the Platform Engineering team is to provide infrastructure primitives, platforms, tooling, and guidance to Klaviyo engineering. This role will specifically focus on our core platform services and developer experience.

As a Platform Engineer, you'll work on crafting a paved path for product teams to manage their services and applications. You will own contribute to the design and development of foundational platform services that enable Klaviyo's engineering teams to move faster with confidence while helping keep our infrastructure cost-efficient

How you will make a difference:

• Ship foundational services to enable Klaviyo engineering to move faster with confidence.
• Develop an understanding of engineering needs across the organization, contributing the design and development of appropriate platform primitives (Infra, Databases, Queuing, etc), that align with the platform's vision
• Design, develop, and deliver software to dramatically improve the availability, scalability, latency, and cost efficiency of Klaviyo's core platforms, helping teams to better serve customers, operate within budget, and meet their SLOs.
• Design and develop systems and processes that enable highly available and scalable applications.
• Leverage technology such as Python, Go, AWS, and Kubernetes to advance Klaviyo's platform.
• Pair with and learn from other Klaviyo engineers to build better software by focusing on performance, self-healing systems, configuration as code, and defensive programming
• Help identify and implement cost-optimization opportunities across the platform — right-sizing infrastructure, improving resource utilization, and building tooling that makes cost efficiency the default for product teams.

Who You Are:

• BA or BS Degree in Computer Science, related field, or equivalent experience.
• 3+ years of responsibility operating and scaling complex distributed systems.
• Experience working in a cloud-native environment.
• Proven experience developing applications in Python and/or Go.
• Fundamental understanding of Linux and all layers of the networking stack.
• Experience in a subset of platform-related areas such as Kubernetes, infrastructure as code, API gateways & traffic management, observability, or asynchronous processing tooling.
• Exposure to or interest in measuring and optimizing infrastructure cost and efficiency
• Familiarity with high-volume data processing and storage systems, and with OLTP and OLAP databases.
• Exposure to the data ecosystem — e.g., ClickHouse, DynamoDB MySQL, Kafka, Spark, Flink, Iceberg, or Airflow — a plus.

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 in Local Currency:

This role may require up to 10% travel for purposes such as new hire onboarding, client or partner work if applicable, team meetings, and industry events. Travel is coordinated in advance.

Get to Know Klaviyo

We’re Klaviyo (pronounced clay-vee-o). We empower creators to own their destiny by making first-party data accessible and actionable like never before. We see limitless potential for the technology we’re developing to nurture personalized experiences in ecommerce and beyond. To reach our goals, we need our own crew of remarkable creators—ambitious and collaborative teammates who stay focused on our north star: delighting our customers. If you’re ready to do the best work of your career, where you’ll be welcomed as your whole self from day one and supported with generous benefits, we hope you’ll join us.

AI fluency at Klaviyo includes responsible use of AI (including privacy, security, bias awareness, and human-in-the-loop). We provide accommodations as needed.

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.

IMPORTANT NOTICE: Our company takes the security and privacy of job applicants very seriously. We will never ask for payment, bank details, or personal financial information as part of the application process. All our legitimate job postings can be found on our official career site. Please be cautious of job offers that come from non-company email addresses (@klaviyo.com), instant messaging platforms, or unsolicited calls.

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. You can find our Job Applicant Privacy Notice here and here (FR).