Lead Software Engineer, Messaging Infrastructure

Dublin, IrelandHybrid

Responsibilities

Own and drive the architecture of key components in Klaviyo's messaging pipeline — from ingestion and routing through to delivery and status tracking
Lead a team of engineers building and scaling highly-available, high-throughput services across one or more messaging channels
Design and implement scalable backend services in Python and/or Go
Collaborate across product, deliverability, compliance, and platform teams to expand messaging capabilities
Drive best practices in system design, code quality, and engineering process across your team
Mentor and grow engineers, contributing to a high bar across the broader Messaging Infra organization
Build smarter systems and workflows by putting AI at the center of how you and your team work Who you are

experience with strong backend and distributed systems design skills
Proficient in Python and/or Go, and able to pick up the other quickly
Skilled in scaling infrastructure on AWS
You've already experimented with AI in your work or personal projects and are excited to keep pushing on that
Languages & Frameworks: Python, Django, React
Data & Infrastructure: MySQL, Redis, Memcached, Apache Zookeeper, Apache Pulsar
Cloud & DevOps: AWS (EC2, RDS, Aurora), Terraform, Jenkins

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
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: €112.000 — €168.000 EUR

Want to learn more about life at Klaviyo? Visit klaviyo.com/careers to see how we empower creators to own their own destiny. About Klaviyo
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

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.
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.
experience that enables our engineering teams to build and ship high-quality software efficiently and with confidence. About the Team
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.
You'll drive technical strategy, own critical components of the delivery infrastructure, and help the team navigate the unique challenges of multi-channel compliance, regulatory requirements, provider integrations, and global deliverability.