Engineering Manager, Profile Traits

<div class="content-intro"><p><em>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. Want to learn more about life at Klaviyo? Visit <a class="_ymio1r31 _ypr0glyw _zcxs1o36 _mizu194a _1ah3dkaa _ra3xnqa1 _128mdkaa _1cvmnqa1 _4davt94y _4bfu18uv _1hms8stv _ajmmnqa1 _vchhusvi _kqswh2mm _ect4ttxp _syaz13af _1a3b18uv _4fpr8stv _5goinqa1 _f8pj13af _9oik18uv _1bnxglyw _jf4cnqa1 _30l313af _1nrm18uv _c2waglyw _1iohnqa1 _9h8h12zz _10531ra0 _1ien1ra0 _n0fx1ra0 _1vhv17z1" href="http://klaviyo.com/careers" data-renderer-mark="true">klaviyo.com/careers</a> to see how we empower creators to own their own destiny.</em></p></div><p>Hybrid 3x/week out of Boston.</p> <p>At Klaviyo, we empower creators and businesses to own their customer relationships. Our platform processes billions of events and powers real-time personalization, automation, and analytics for thousands of customers. At the core of this platform is our data infrastructure — the systems that ingest, store, transform, and serve customer data at scale.</p> <p><strong>About the Role</strong></p> <p>The <strong>Profile Traits team</strong> owns how customer profile data is represented, stored, mutated, and served across Klaviyo. Profile traits are one of the most critical primitives in the platform: they power segmentation, personalization, flows, analytics, and emerging AI-driven features.</p> <p>As <strong>Engineering Manager, Profile Traits</strong>, you will lead a team of engineers responsible for building and scaling these foundational systems. This role sits at the intersection of distributed systems, data modeling, and product semantics, with a strong emphasis on correctness, performance, and long-term platform evolution.</p> <p>You will partner closely with product managers and adjacent platform teams (Events, Identity Consent, Segmentation, Flows) to ensure profile data remains reliable, fast, and easy to reason about as Klaviyo continues to grow.</p> <p><strong>What You’ll Do</strong></p> <ul> <li>Lead, mentor, and grow a team of engineers building Klaviyo’s profile traits platform</li> <li>Own systems responsible for profile attribute storage, mutation, and serving</li> <li>Drive technical and execution excellence across correctness, latency, and cost</li> <li>Partner with product and platform teams to define roadmaps and priorities</li> <li>Guide architectural decisions around schema evolution, consistency, and scale</li> <li>Participate in design and code reviews to maintain a high technical bar</li> <li>Foster a culture of ownership, collaboration, and continuous improvement</li> </ul> <p><strong>What You’ll Work On</strong></p> <ul> <li>High-QPS, stateful systems supporting real-time and nearline profile updates</li> <li>Schema evolution and backward compatibility for long-lived customer data</li> <li>Mechanisms for trait computation, backfills, and data migrations</li> <li>Improving debuggability, observability, and operational maturity</li> <li>Scaling profile read and write paths to support new product capabilities</li> </ul> <p><strong>Who You AreRequired Qualifications</strong></p> <ul> <li>8–10+ years of software engineering experience</li> <li>3+ years of engineering management experience</li> <li>Experience owning and evolving <strong>stateful or data-intensive systems at scale</strong></li> <li>Strong understanding of distributed systems tradeoffs</li> <li>Proven ability to coach and develop senior engineers</li> <li>Experience partnering with Product on ambiguous, platform-oriented problems</li> </ul> <p><strong>Nice to Have</strong></p> <ul> <li>Experience with high-QPS OLTP systems</li> <li>Background in data co ... (truncated, view full listing at source)