Klaviyo · 8 hours ago
Senior Software Engineer - Profiles, Lists and Segments
Boston, MA
Full-time
Onsite
Senior Level
$148K/yr - $222K/yr
5+ years expKlaviyo is a company that empowers creators to own their destiny by making first-party data accessible and actionable. They are seeking a Senior Software Engineer to design and build scalable systems that enhance customer data management and activation, focusing on frontend development and user experience.
AdvertisingAnalyticsE-CommerceMarketing AutomationSoftware
Responsibilities
You will be a core member of the PLS team, working on impactful customer-facing features that will make our product the best in the industry
You will work on creating easy-to-use editors that are highly performant
You will work closely with Product, Design, and Data Science to provide the best experience for our customers
You will mentor team members and drive initiatives that help the team learn new skills
Qualification
Required
5+ years of experience in full-stack development with strong hands-on skills in React, Redux, JavaScript, HTML, and CSS, along with familiarity with general web best practices
Has a track record of delivering and shipping work powered by or accelerated through AI
Experience conducting code reviews and running a robust testing cycle using automated testing practices and frameworks, including end-to-end and integration tests (e.g., cypress, pytest)
Experienced with RESTful and GraphQL APIs, and evolving APIs and data models to support product success
You take ownership of your work—from requirements and edge cases to implementation and testing—and are motivated by solving tough problems with others
Proven track record of leading complex, multi-quarter projects involving cross-team collaboration and being accountable for their outcomes
Benefits
Participation in the company’s annual cash bonus plan
Variable compensation (OTE) for sales and customer success roles
Equity
Sign-on payments
A comprehensive range of health, welfare, and wellbeing benefits based on eligibility
Company
Klaviyo
Klaviyo is an automation and email platform designed to help grow businesses.
1001-5000 employees
H1B Sponsorship
Klaviyo has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (47)
2024 (29)
2023 (24)
2022 (27)
2021 (21)
2020 (8)
Funding
Current Stage
Public CompanyTotal Funding
$1.35BKey Investors
ShopifySands Capital VenturesAccel
2025-08-13Post Ipo Secondary· $195.06M
2025-05-14Post Ipo Secondary· $372.95M
2023-09-20IPO
Leadership Team
Andrew Bialecki
CEO
Ed Hallen
Co-Founder, Chief Strategy Officer, Board Member
Recent News
Investing.com
2026-01-03
2025-12-17
Company data provided by crunchbase