# Senior Software Engineer at Klaviyo

- Company: Klaviyo
- What the company does: Klaviyo unifies AI-powered email marketing and SMS to drive growth, retention, and measurable results. Build personalized, omnichannel experiences across WhatsApp, ecommerce, and more with K:AI Agents. Backed by Accel.
- Company website: https://www.klaviyo.com/
- Type: Startups
- Level: Senior
- Location: Boston, MA
- Work setup: On-site
- Posted: 2026-09-01
- Apply by: 2026-10-16
- Apply: https://www.klaviyo.com/careers/jobs/7973663003?gh_jid=7973663003
- Page: https://www.1752.vc/careers/jobs/klaviyo-senior-software-engineer/

## About the role

Our team is looking for a Senior Full Stack Engineer to lead key initiatives that will enhance our product offerings and support our company’s growth. In this role, you'll play a crucial part in shaping outcomes by developing innovative end-to-end solutions using both front-end and back-end technologies. You’ll optimize existing products and create new solutions that redefine what’s possible for our customers.

## What they're looking for

- A proven track record of building high-quality products and systems, with pride in writing clean, high-quality code
- 5+ years of experience in a software engineering role
- Strong experience developing end-to-end software solutions or extensive experience with both front-end and back-end technologies
- Experience working with React and related technologies
- Experience leading projects and being accountable for their outcomes
- Experience mentoring team members or driving initiatives that help the team learn new skills

Tags: Engineering