Senior Software Engineer - Profiles, Identity, Consent

Klaviyo is a company that empowers creators to own their destiny by making first-party data accessible and actionable. They are seeking a Senior Software Engineer to design and operate scalable distributed systems for identity resolution and consent, while collaborating cross-functionally to translate requirements into robust technical designs.

Responsibilities:

• Design and operate scalable distributed systems for identity resolution and consent
• Collaborate cross-functionally to translate requirements into robust technical designs
• Author technical design docs and service contracts for operational excellence
• Participate in on-call rotations to continuously improve system reliability
• Provide technical mentorship and conduct thoughtful code and design reviews
• Delegate implementation to AI agents by defining clear intent and rigorously verifying outputs for security and correctness

Requirements:

• 7+ years of software engineering experience with strong computer science fundamentals
• Expertise in building backend service-oriented applications and REST/gRPC APIs
• Hands-on experience scaling distributed systems for performance and consistency
• Proficiency with streaming and batch processing systems
• Production experience with relational database schema design and optimization
• Excellent communication skills for leading execution and driving team alignment
• BA/BS in Computer Science, a related field, or equivalent practical experience
• Expertise in agentic AI workflows to safely increase development throughput while preserving architectural coherence