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Senior Software Engineer - Accounts

  • Boston, MA
  • Engineering

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 own destiny.

The Accounts team is the backbone of how we scale our platform to support over 100,000 customers. We work to provide scalable, highly available, solutions to data storage, data integrity, and provide the framework and tools to help Klaviyo empower each and every customer to the best of their ability. This team focuses on owning the core reference of what a company is and how it interacts and communicates with all other parts of our platform, focusing on the next iteration of what core data, its subsystems, and its accessors looks like, as well as building customer facing features that enhance the overall experience of being a user of Klaviyo. Customer First is one of our most important values, and a principle of everything we build.

About the Role 

A Senior Software Engineer on the Account team will be responsible for working closely with the team’s Product Manager, Technical Product Owner, and Engineering Manager to plan, design, and evolve our core data storage and service layer for one of the most centralized and core dependencies across all of our engineering efforts. You’ll work across the R&D org to build solutions that can bridge our existing systems with forward thinking solutions that empower our customers to own and manage their existence in our platform. Engineers on this team will work very closely with our Application Security and Billing teams to build cohesive platform-level tooling and services.

Technologies we use (not exhaustive):

  • Python, Django, React, RabbitMQ, Celery, MySQL, Memcached, Redis
  • Amazon Web Services (EC2, RDS, Aurora, etc.)Terraform, Kuberentes, Splunk, Jenkins, Grafana, and other modern DevOps tools

What we are looking for 

  • 4-6+ years of experience in a software engineering discipline
  • Significant experience with full stack application development
  • Experience working with both monolithic and networked-service architectures
  • Experience with scaling and iterating on databases that can support high query volumes and tolerate little to no downtime
  • Experience with CI/CD pipelines
  • Experience debugging performance issues and improving application performance
  • Proven experience with being a coach and a mentor for team members and helping them grow

Nice to Have

  • Experience creating new applications with scalability in mind
  • Exposure to large-scale system design
  • Experience with AWS or any similar cloud provider 

Get to Know Klaviyo

Klaviyo is a world-leading marketing automation platform dedicated to accelerating revenue and customer connection for online businesses. Klaviyo makes it easy to store, access, analyze and use transactional and behavioral data to power highly-targeted customer and prospect communications. The company's hybrid customer-data and marketing-platform model allows companies to grow by fostering direct relationships with customers, without giving up their valuable data to popular big-tech ad platforms. Over 265,000 innovative companies like Unilever, Custom Ink, Living Proof and Huckberry sell more with Klaviyo. Learn more at .

If you are a California, Colorado, Rhode Island, Washington, New York City, or Jersey City resident and this role is a remote role, you can receive additional information about the compensation and benefits for this role, which we will provide upon request. Requests can be submitted here . Additional information regarding benefits can be found at .

      • 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.


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