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 careers.klaviyo.com to see how we empower creators to own their own destiny.
Hybrid 3x/week out of Boston.
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.
About the Role
The Profile Traits team 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.
As Engineering Manager, Profile Traits, 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.
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.
What You’ll Do
- Lead, mentor, and grow a team of engineers building Klaviyo’s profile traits platform
- Own systems responsible for profile attribute storage, mutation, and serving
- Drive technical and execution excellence across correctness, latency, and cost
- Partner with product and platform teams to define roadmaps and priorities
- Guide architectural decisions around schema evolution, consistency, and scale
- Participate in design and code reviews to maintain a high technical bar
- Foster a culture of ownership, collaboration, and continuous improvement
What You’ll Work On
- High-QPS, stateful systems supporting real-time and nearline profile updates
- Schema evolution and backward compatibility for long-lived customer data
- Mechanisms for trait computation, backfills, and data migrations
- Improving debuggability, observability, and operational maturity
- Scaling profile read and write paths to support new product capabilities
Who You AreRequired Qualifications
- 8–10+ years of software engineering experience
- 3+ years of engineering management experience
- Experience owning and evolving stateful or data-intensive systems at scale
- Strong understanding of distributed systems tradeoffs
- Proven ability to coach and develop senior engineers
- Experience partnering with Product on ambiguous, platform-oriented problems
Nice to Have
- Experience with high-QPS OLTP systems
- Background in data consistency, data modeling, or schema evolution
- Experience supporting both online and analytical workloads
- Familiarity with cloud-native systems (AWS preferred)
Why This Role Matters
Profile traits are how customers experience their data in Klaviyo. Small decisions in these systems can have outsized impact — from segmentation accuracy to real-time personalization to AI-driven insights. This role offers the opportunity to shape a core platform capability while leading a team solving complex, high-impact technical problems.
Technologies We Use
Our stack evolves with our needs, but today includes:
- Distributed services built primarily in Python and Go
- Cloud infrastructure on AWS
- Stream processing and data pipelines at scale
- A mix of real-time, nearline, and analytical data systems
Massachusetts Applicants:
It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
Our salary range reflects the cost of labor across various U.S. geographic markets. The range displayed below reflects the minimum and maximum target salaries for the position across all our US locations. The base salary offered for this position is determined by several factors, including the applicant’s job-related skills, relevant experience, education or training, and work location.
In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility.
Your recruiter can provide more details about the specific salary/OTE range for your preferred location during the hiring process.
Get to Know Klaviyo
We’re Klaviyo (pronounced clay-vee-oh). We empower creators to own their destiny by making first-party data accessible and actionable like never before. We see limitless potential for the technology we’re developing to nurture personalized experiences in ecommerce and beyond. To reach our goals, we need our own crew of remarkable creators—ambitious and collaborative teammates who stay focused on our north star: delighting our customers. If you’re ready to do the best work of your career, where you’ll be welcomed as your whole self from day one and supported with generous benefits, we hope you’ll join us.
AI fluency at Klaviyo includes responsible use of AI (including privacy, security, bias awareness, and human-in-the-loop). We provide accommodations as needed.
By participating in Klaviyo’s interview process, you acknowledge that you have read, understood, and will adhere to our Guidelines for using AI in the Klaviyo interview Process. For more information about how we process your personal data, see our Job Applicant Privacy Notice.
Klaviyo is committed to a policy of equal opportunity and non-discrimination. We do not discriminate on the basis of race, ethnicity, citizenship, national origin, color, religion or religious creed, age, sex (including pregnancy), gender identity, sexual orientation, physical or mental disability, veteran or active military status, marital status, criminal record, genetics, retaliation, sexual harassment or any other characteristic protected by applicable law.
Top Skills
Klaviyo Boston, Massachusetts, USA Office
We're in the heart of the Financial district with easy access to public transportation and a short walk from South Station. We also have hubs in Denver, London and Sydney.
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