Software Engineer II - Growth at Klaviyo

<div class="content-intro"><p><em>At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you’re a close but not exact match with the description, we hope you’ll still consider applying. Want to learn more about life at Klaviyo? Visit <a class="_ymio1r31 _ypr0glyw _zcxs1o36 _mizu194a _1ah3dkaa _ra3xnqa1 _128mdkaa _1cvmnqa1 _4davt94y _4bfu18uv _1hms8stv _ajmmnqa1 _vchhusvi _kqswh2mm _ect4ttxp _syaz13af _1a3b18uv _4fpr8stv _5goinqa1 _f8pj13af _9oik18uv _1bnxglyw _jf4cnqa1 _30l313af _1nrm18uv _c2waglyw _1iohnqa1 _9h8h12zz _10531ra0 _1ien1ra0 _n0fx1ra0 _1vhv17z1" href="http://klaviyo.com/careers" data-renderer-mark="true">klaviyo.com/careers</a> to see how we empower creators to own their own destiny.</em></p></div><p><strong><em>Software Engineer ii - Growth</em></strong></p> <p><strong><em>Why You Should Join the Onboarding Team</em></strong><em> </em></p> <p>The Product Expansion / Activation team at Klaviyo is focused on improving the early experience of Klaviyo for new customers. We work diligently to improve the rate at which customers are successfully setting up their Klaviyo account and gaining value from the platform. Engineers on the team use data to discover opportunities for improvement, implement A/B tests to validate ideas, and work across the product to iteratively improve UX and reduce friction for new customers. We are looking for great generalist software engineers with a passion for the experience-layer that have an interest in or experience with growing a user-base and building a great customer onboarding pipeline and experience.</p> <p><strong><em>How You Will Make a Difference </em></strong></p> <ul> <li>In this role, you will implement user-experience improvements across the Klaviyo product, especially in areas that affect new customers.</li> <li>You will design and implement A/B tests to validate ideas, and interpret the results of these tests to inform iterative improvements to the product.</li> <li>You will collaborate with marketing, data-science, sales, and engineering teams to discover areas for improvement, as well as engaging with customers directly to learn more about how we can better serve their needs.</li> <li>You will help us improve our experimentation and development processes, and mentor other engineers on the team.</li> <li>You will clearly define the goal, constraints, and context for AI agents, while remaining responsible for the correctness of the implementation, with a focus on security, performance, and maintainability.</li> <li>Working from our Boston HQ 5 days a week.</li> </ul> <p><strong><em>Who You Are </em></strong></p> <ul> <li>Have a background in full stack software engineering with experience building and improving products with an emphasis on user-facing features, along with the APIs and infrastructure to support them.</li> <li>Passionate about growing and improving a product on a daily basis using a data driven mindset.</li> <li>Experienced with A/B Testing products with metric based goals to improve user experience and customer acquisition and success (nice to have)</li> <li>Demonstrated ability and success in using AI-driven software delivery practices and methods and/or a willingness and excitement to learn.</li> <li>Thrives in an entrepreneurial type environment that is fast paced, customer focused, and strategic.</li> </ul> <p><strong>Technologies we use (not exhaustive):</strong></p> <ul> <li>HTML, TypeScript, JavaScript, React</li> <li>Python, Django</li> <li>MySQL, Cassandra, RabbitMQ, Redis</li> <li>Amazon Web Services (EC2, RDS, Aurora, etc.), Terraform, Ansible, Packer, and other DevOps tools</li> </ul><div class="content-pay-transparency"><div class="pay-input"><div class="description"><p><strong>Massachusetts Applicants:<br></strong>It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.</p> <hr> <p>Our salary range reflects the cost of labor across various U.S. geographic markets. The range displayed below reflects the minimum an

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