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

We love tackling tough engineering problems and look for Engineers who specialize in certain areas but are passionate about building, owning & scaling features end to end from scratch and breaking through any obstacle or technical challenge in their way. We push each other to move out of our comfort zone, learn new technologies and work hard to ensure each day is better than the last.

Klaviyo operates a real-time data platform coded in Python built for massive scale on Amazon Web Services (AWS). Engineers come to Klaviyo with experience in a variety of languages and from a number of disciplines.

About the Events Team

Within the Klaviyo Data Platform area, the focus of the Events team is to manage Klaviyo’s event dataset and enhance it with business-relevant logical schema definitions in order to rapidly manage, analyze and derived insights from customer data. You will have ownership over designing foundational components within the greater technical vision of Klaviyo’s data storage and access system.

Technologies we use (not exhaustive)

• Python/Django
• MySQL
• AWS
• Terraform/Kubernetes
• Kafka/RabbitMQ
• Redis/Memcached
• Protobuf/Parquet

Who You Are:

• You are a passionate technologist who likes to build and operate large scale distributed systems.
• You are deeply interested in database systems, big data platforms and technologies.
• You have a strong sense of ownership and can-do attitude.
• You strongly believe in collaboration and teamwork.
• You believe in continuous learning and sharing knowledge.
• You have a funny bone and don’t take yourself too seriously.

How You’ll Have an Impact:

• You will help drive technical/architectural evolution of the query area.
• You will contribute to all the phases of the software development lifecycle.
• You will represent the team in various cross functional projects and initiatives.
• You will introduce technical best practices, new design patterns and new software tools/platforms to the team.
• You will directly contribute to both writing the code for new components and effectively delegating implementation work as needed.
• You will be responsible for mentoring engineers.

What You’ll Need:

• 8+ years of experience in software development, and strong knowledge of computer science fundamentals.
• 5+ years of experience testing, developing, and launching software products, and 3 years of experience with software design and architecture.
• Hands-on experience designing reliable, fault-tolerant, and high performance distributed systems.
• Hands-on experience building components of service oriented architecture.
• Hand-on experience writing complex SQL queries.
• Experience working with AWS technologies.
• Bachelors degree in Computer Science or equivalent experience.

Preferred Skills:

• Experience building and maintaining big data pipelines and a sound understanding of big-data constructs and technologies.
• Experience with queuing fundamentals and technologies.
• Experience building API-gateways and developing service APIs using REST/GRPC/GraphQL technologies.
• Experience working with database internals, specifically query planner and optimizers.