Software Engineer II - Profile Growth

About the Role

Klaviyo is looking for a Full Stack Engineer to support key initiatives that enhance our product offerings and drive company growth. In this role, you'll play a critical part in delivering end-to-end solutions using both front-end and back-end technologies. You’ll improve existing products and develop new capabilities that push the boundaries of what’s possible for our customers.

As a Software Engineer II, you’ll tackle complex challenges, explore multiple solutions, and weigh business and technical trade-offs to determine the best path forward. You’ll actively contribute to team discussions and help shape important technology decisions. You'll also be responsible for shipping well-designed, thoroughly tested solutions that prioritize reliability and performance.

The Profile Growth team drives Klaviyo’s customer acquisition strategy by developing innovative solutions that expand profile growth and opt-in opportunities across digital channels. This role will focus on building integrated entry points—especially through social media platforms—empowering brands to convert and engage audiences directly from networks like Instagram. You’ll create tools and workflows to optimize subscriber onboarding and leverage analytics to monitor engagement across social integrations. Success in this position relies on collaborating with cross-functional peers to deliver impactful enhancements for social-powered profile acquisition and subscriber growth.

What We’re Looking For

• A proven track record of building high-quality products and systems, with a focus on writing clean, maintainable code


• 3+ years of experience in a software engineering role


• Experience building end-to-end software solutions or deep experience with both front-end and back-end technologies


• Familiarity with code reviews and leading or participating in robust testing practices


• Experience working in agile, fast-paced environments

Nice to Have

• Experience with Python and related technologies


• Experience with React and related technologies


• Background in digital marketing or customer data software


• Exposure to machine learning concepts or applications


• Experience building cloud-native solutions, ideally on AWS

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here