Senior Software Engineer - Profiles, Lists and Segments
KlaviyoBoston, Massachusetts, United States
Posted January 23, 2026
148000 - 222000 USD year
Full Time
About the Company
Klaviyo is a technology company that empowers creators to own their destiny by making first-party data accessible and actionable like never before.
Job Description
Klaviyo is looking for a Senior Software Engineer to join their Profiles, Lists and Segments team. The successful candidate will design and build scalable systems that power customer data experiences, working closely with product managers, data scientists, and other platform teams. The role involves crafting thoughtful, reusable components and seamless user experiences using technologies like TypeScript, React, Python, and Django.
Requirements
- 5+ years of experience in full-stack development
- Strong hands-on skills in React, Redux, JavaScript, HTML, and CSS
- Familiarity with general web best practices
- Experience delivering and shipping work powered by or accelerated through AI
- Experience conducting code reviews and running a robust testing cycle
- Experience with RESTful and GraphQL APIs
- Proven track record of leading complex, multi-quarter projects involving cross-team collaboration
Benefits
- Comprehensive range of health, welfare, and wellbeing benefits
- Participation in the company’s annual cash bonus plan
- Variable compensation (OTE) for sales and customer success roles
- Equity
- Sign-on payments
