Senior AI Engineer - Customer Agent

ABOUT THE ROLE We are seeking a Senior AI Engineer to join our Customer Agent team at Klaviyo, where you will play a key role in designing and building scalable backend systems and user experiences that power our AI products and AI agent solutions. As a Senior AI Engineer, you will partner closely with product managers, machine learning engineers, and data scientists to drive real-world impact at scale. This is a backend-heavy role with opportunities to influence architecture, async processing pipelines, distributed systems, and more. WHAT YOU'LL DO You will design and build backend systems that support scaling our AI solutions for 167,000+ customers. You will develop robust, reliable, and scalable data collection and processing pipelines for machine learning models to train and consume. Additionally, you will develop robust, reliable, and scalable services to serve AI models in production environments. You will also contribute to evolving our agentic architecture, making our AI agents more self-sufficient and performant. Furthermore, you will contribute to a culture of ownership, experimentation, and customer-centric product thinking. WHAT YOU'LL NEED To be successful in this role, you will need 5-7 years of professional experience in software engineering, with a strong focus on backend systems and distributed architectures. You will have hands-on experience building and deploying generative AI and agentic AI applications into production, with expertise in prompt engineering, few-shot learning, fine-tuning, and evaluation. You will be an experienced backend engineer with a strong track record of building scalable, distributed systems, especially in the service of AI agent capabilities. You will be proficient in Python and modern backend frameworks (FastAPI, Django preferred). You will also have experience creating human and automated evals to ensure high AI model quality. WHY REMOTE As a remote employee at Klaviyo, you will have the flexibility to work from anywhere and enjoy a range of benefits that support your work-life balance and well-being. You will be part of a global team that values diversity, equity, and inclusion, and you will have opportunities to collaborate with colleagues from diverse backgrounds and industries. BENEFITS We offer a competitive salary, comprehensive health insurance, parental leave, education stipend, life insurance, and equipment stipend. You will also have access to flexible schedule, professional development opportunities, and a culture of ownership, experimentation, and customer-centric product thinking.