ApplyBlast uses AI to match you with the right jobs, tailor your resume and cover letter, and apply automatically so you can land your dream job faster.

Features

Auto Apply Resume Optimizer Cover Letter Optimizer Interview Prep

Company

Social Media

Need Help?

team@applyblast.com

Principal Engineer, Enterprise Scalability at Klaviyo - ApplyBlast

Principal Engineer, Enterprise Scalability

Klaviyo

6 hours ago

3.3 on Glassdoor

Boston, Massachusetts, United States

Onsite

Full Time

Senior

0 applicants

View Job Listing

Apply to 100+ jobs

About this role

The Principal Engineer, Enterprise Scalability at Klaviyo is a senior individual contributor role focused on owning the company's approach to enterprise scalability, performance, reliability, and multi-region readiness. This position involves identifying and removing major bottlenecks, driving platform-wide architectural changes, and establishing clear measures of readiness for the largest tenants and most demanding workloads. The role requires deep technical expertise, hands-on engineering, and the ability to lead through influence across teams to deliver improvements that matter to customers.

Responsibilities

Define scale readiness targets and establish measurable performance scorecards
Remove bottlenecks using production data profiling and reproducible benchmarks
Drive architectural changes including sharding partitioning and multi-region readiness

Skills

About Klaviyo

klaviyo.com

Headquarters

Boston, Massachusetts, United States

Company Size

1001-5000 employees

Founded

2012

View Profile

Klaviyo is a B2C CRM and marketing automation platform that unifies AI-powered email and SMS to help ecommerce brands drive growth and retention. It uses customer data, advanced segmentation, and automation flows to deliver personalized, omnichannel experiences across email, SMS, WhatsApp, and more — including AI-driven capabilities via K:AI Agents. Klaviyo emphasizes measurable results with analytics, testing, and integrations with major ecommerce platforms to boost revenue and lifetime value. Companies use it to build targeted lifecycle campaigns, personalized messaging, and data-driven retention strategies at scale.