Software Engineer II - Forms

<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><h3><strong>About the Role</strong></h3> <p>Klaviyo is looking for a Full Stack Software Engineer II to join the <strong>Signup Forms</strong> team. On Signup Forms you’ll help rebuild and evolve one of Klaviyo’s core growth surfaces so brands can reliably capture high-intent profiles across web, SMS, and messaging channels.</p> <p>The team is explicitly focused on improving reliability and developer experience while making leaps in both AI enablement and enterprise-level scale. This role is about delivering both the foundations and the pieces that unlock those higher-level platform capabilities.</p> <p>As a Software Engineer II you’ll own non-trivial end-to-end pieces of the product: design and ship well-tested frontend and backend work, weigh trade-offs between reliability, performance, and developer velocity, and help make architectural decisions within the team’s roadmap. You’ll routinely tackle complex problems and deliver pragmatic, maintainable solutions that improve both customer outcomes and the team’s developer experience.</p> <p>Within the organization, we focus on making experiences part of an extensible, channel-agnostic, enterprise-grade platform. That includes the web experiences, APIs, and backend orchestration that power validation, actions, and delivery alongside the analytics and data plumbing that connect form events to profiles and downstream messaging. You’ll partner closely with product, design, analytics, and other engineering teams to deliver best-in-class customer-facing experiences. </p> <h3><strong>What We’re Looking For</strong></h3> <ul> <li>A proven track record of building high-quality products and systems, with a focus on writing clean, maintainable code</li> <li>3+ years of experience in a software engineering role</li> <li>Experience building end-to-end software solutions or deep experience with both front-end and back-end technologies</li> <li>Familiarity with code reviews and leading or participating in robust testing practices</li> <li>Experience working in agile, fast-paced environments</li> <li>Experience driving technical solutions in cross functional teams within an organization</li> <li>Quick learners that can raise the team’s bar while </li> </ul> <h3><strong>Nice to Have</strong></h3> <ul> <li>Experience with React, Typescript and related technologies</li> <li>Experience with Python and related technologies</li> <li>Background in digital marketing or customer data software</li> <li>Exposure to machine learning concepts or applications</li> <li>Experience building cloud-native solutions, ideally on AWS</li> </ul> <p> </p> <p>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<a href="https://getcovey.com/product/covey-scout-inbound"> Covey Scout for Inbound</a> on April 3, 2025.</p> <p>Please see the independent bias audi ... (truncated, view full listing at source)