Senior Software Engineer - Profile Subscriptions

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

Klaviyo operates a real-time data platform written in Python and 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. We love tackling tough engineering problems and look for Engineers who are passionate about building, owning, and scaling features 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. 

The Profile Subscription Team is responsible for one of the most foundational product areas in Klaviyo, managing customer marketing subscriptions. We own real-time processing for millions of email, SMS, and mobile push marketing subscriptions every day as well as managing over 15 billion consent records across all time.

As an engineer on this team, you will be responsible for designing, building, and maintaining systems to support two core product areas in Klaviyo. You will work with a cross functional team to help refine feature specifications, write technical design documents, create system infrastructure, write high quality code, and operate large scale systems in production. You will also review other engineer’s designs and code, and provide technical mentorship to other engineers on the team and in the broader engineering organization.

• Python
• Django
• React
• MySQL
• ProxySQL
• Redis
• Memcached
• RabbitMQ
• Kafka

• Highly skilled in using at least one modern programming language
• 5+ years of experience in a software engineering discipline
• Significant experience with full stack application development
• Able to communicate well
• Able to work with others on a team
• Able to learn continuously and adapt to a high growth environment
• Able to stick with and solve difficult problems

• Experience with distributed systems
• Experience performance tuning and scaling systems
• Experience with SQL databases (either MySQL or PostgreSQL)
• schema design
• normalization / denormalization trade-offs
• performance
• operations
• Experience using Linux operating systems
• Experience with high volume data processing and storage systems