Software Engineer II - Custom Objects at Klaviyo

Klaviyo

Boston, MA·4d ago

Mid LevelFull-timePythonAWSGitAI

Salary Range

$102,000 - $138,000 /year

Estimated

This salary is estimated based on similar roles. The actual salary may vary.

About the Role

We are looking for a Software Engineer II to join the Custom Objects team at Klaviyo. This role involves building and scaling systems that allow customers to safely model, query, and activate their custom data at scale.

Key Responsibilities

→Build systems that support customer-defined schemas and flexible data models
→Enable other teams to safely rely on object data
→Work on platform primitives that balance flexibility, correctness, performance, and cost
→Design, build, and maintain services that power the Custom Objects platform
→Implement APIs and data pipelines for creating, updating, and querying custom object data
→Work with evolving schemas while maintaining backwards compatibility and data integrity
→Collaborate with Product, Events, Profiles, and Analytics teams to integrate custom objects into the broader platform
→Debug and improve performance of data-heavy systems operating at scale
→Participate in code reviews, design discussions, and on-call rotations
→Contribute to improving operational excellence through better observability and tooling

Requirements

✓3–6 years of professional software engineering experience
✓Experience building backend systems in a production environment
✓Strong fundamentals in data structures, algorithms, and system design
✓Experience working with databases or data storage systems (relational or distributed)
✓Ability to reason about correctness, tradeoffs, and edge cases in stateful systems
✓Strong communication skills and comfort working with cross-functional partners