Software Engineer II - Profiles, Identity, Consent

Software Engineer II - Profiles, Identity, Consent

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  to see how we empower creators to own their destiny.

We love tackling tough engineering problems and look for Engineers who specialize in certain areas but are passionate about building, owning & scaling features end to end from scratch 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.

Klaviyo operates a real‑time data platform 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.

The Profiles, Identity, and Consent teams are responsible for processing and storing profile‑related data s data represents Klaviyo’s customers’ own customers (known as profiles) and the reachability of those profiles across all messaging channels. We work closely with teams responsible for segmentation, messaging channels, data warehousing, data exchange, etc. to make this data available throughout Klaviyo to support Klaviyo’s core product capabilities.

We store tens of billions of records around a billion reads and writes against those records every day.

This team is a key contributor to the evolution of Klaviyo’s data platform, bridging the gap between foundational platform capabilities and critical customer‑facing business logic within Klaviyo’s product suite.

As an engineer on this team, you will be responsible for designing, building, and maintaining systems to support 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 partner with others on the team to review technical designs and code, and provide technical mentorship to other engineers on the team and in the broader engineering organization.

We’re looking for a backend‑focused engineer. You’ll be working with the following tech stack:

• Python, Django
• Apache Kafka, Pulsar, Spark, Iceberg, and other tech from the big data stack
• Graphite, statsd
• AWS, Terraform, Docker, Kubernetes, Buildkite, and other modern Dev Ops tools

• Must have 4+ years of experience in a software engineering discipline
• Strong programming skills in at least one modern language
• Experience building backend, service‑oriented applications
• Experience with queuing and/or streaming systems (e.g., SQS, Rabbit
  
  MQ, Kafka)
• Foundational understanding of distributed systems
• Able to communicate well, both verbally and in writing
• 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
• BA or BS Degree in Computer Science, related field, or equivalent experience

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

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…