Lead Software Engineer - New Products

<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><h2><strong>Lead Software Engineer, New Products</strong></h2> <h3><strong>About the Role</strong></h3> <p>We’re looking for a <strong>Lead Software Engineer</strong> to set technical direction and drive delivery for some of Klaviyo’s most ambitious new product initiatives. In this role, you’ll operate as a technical owner for major product areas—shaping architecture, guiding execution, and ensuring that teams deliver high-impact, high-quality solutions at speed.</p> <p>You’ll partner closely with Product, Design, and Engineering leadership to translate bold ideas into scalable systems. As a Lead, you’ll tackle the most complex technical challenges, make high-stakes trade-off decisions, and raise the bar for engineering excellence across the New Products organization. You’ll also be a force multiplier—mentoring senior and mid-level engineers, influencing best practices, and helping the team move faster and smarter.</p> <p>The New Products team drives Klaviyo’s most ambitious innovations—creating and scaling the company’s boldest new bets. As a nimble group with a flat structure and fast-moving culture, we prioritize simplicity, speed, and impact. Every team member is expected to take radical ownership—rolling up their sleeves, collaborating across disciplines, and pushing beyond traditional role boundaries to make things happen. Success in this role means setting the standard for technical leadership, execution velocity, and product quality while helping shape Klaviyo’s future through experimentation, creativity, and disciplined execution.</p> <h3><strong>What You’ll Do</strong></h3> <ul> <li>Own technical strategy and architecture for major product initiatives.</li> <li>Lead the design and delivery of complex, end-to-end systems across frontend and backend.</li> <li>Drive critical technology decisions, balancing long-term vision with near-term execution.</li> <li>Mentor senior and mid-level engineers, supporting their growth and raising team-wide standards.</li> <li>Partner with Product and Design to shape product direction and technical feasibility.</li> <li>Establish and reinforce best practices for code quality, testing, reliability, and performance.</li> <li>Champion the use of AI-first workflows and systems, responsibly integrating new tools to improve developer productivity and product capability.<br><br></li> </ul> <h3><strong>What We’re Looking For</strong></h3> <ul> <li>A strong track record of building and scaling high-quality products and systems.</li> <li>8+ years of professional software engineering experience.</li> <li>Deep experience designing and delivering complex, end-to-end solutions.</li> <li>Proven ability to lead large projects or technical domains with accountability for outcomes.</li> <li>Experience influencing technical direction beyond your immediate team.</li> <li>Strong mentoring and coaching skills, especially for senior engineers.</li> <li>Expertise in code reviews, testing strategies, and production readiness.</li> <li>Comfort operating in fas ... (truncated, view full listing at source)