Klaviyo jobs

Klaviyo is seeking a Senior Lead Engineer, Applied AI to join the Customer Agent team in Boston. This role is a principal-caliber individual contributor position focused on building a 0-to-1 agentic product. You will set the technical and product direction for the core platform, tackling complex challenges in orchestration, evaluation, guardrails, memory, and self-healing systems. The position involves writing and shipping code, making critical architectural decisions, and mentoring other engineers through design reviews. You will collaborate with product, design, and data science leaders to shape the roadmap and evaluate emerging AI technologies for production deployment.

$216k - $324k

Klaviyo is seeking a Senior Staff Engineer to join the Customer Agent team in Boston. This team is building a cutting-edge conversational AI system designed to enable brands to serve their customers at an unprecedented scale. As a key member, you will be instrumental in shaping the technical and product direction of this 0-to-1 agentic product, operating with the agility of a startup within a large, innovative tech company. This role is for a principal-caliber individual contributor who has a proven track record of architecting, building, and scaling production agentic systems beyond the demo phase, acting as a force multiplier for the organization through strong technical judgment.

$216k - $324k

Klaviyo is seeking a Lead Product Data Scientist, Agents to spearhead the measurement and data science strategy for their AI-powered agent products, Composer and Customer Agent. This high-visibility, hands-on technical leadership role involves defining how to measure the adoption, engagement, quality, cost, and business impact of these AI agents. You will establish the analytical foundations to understand customer value, tackle emerging measurement challenges, and develop rigorous approaches to evaluating agent performance. The role requires combining experimentation, causal inference, and advanced analytics to inform product strategy, pricing, and monetization, translating complex findings into actionable recommendations. You will also mentor other data scientists and define the technical direction for agent analytics at Klaviyo.

$172k - $258k

At Klaviyo, we believe the future of software lies not only in tools that help people work more efficiently, but in intelligent systems that can take action, learn from outcomes, and improve customer experiences over time. Klaviyo serves more than 167,000 customers and processes billions of consumer profiles, messages, interactions, and conversion signals. This creates a unique opportunity to build state-of-the-art AI systems that help businesses create and execute better customer experiences at scale. We’re looking for a Software Engineer, Conversational Products & Agent Workflows to join the Customer Agent team, Klaviyo’s AI-native conversational platform. You’ll help build scalable backend systems and AI-powered product experiences that enable agents to retrieve context, use tools, and take reliable action on behalf of customers. This is a backend-heavy role with opportunities to contribute to user-facing experiences. You’ll independently own meaningful pieces of larger systems, contribute to technical decisions, and continue developing your depth across backend engineering, applied AI, and production reliability.

$116k - $174k

As a Lead Engineer on the Customer Agent team, you will set the technical and product direction for a core area of our conversational AI system. This role involves building a 0-to-1 agentic product with the speed and ownership of a startup, backed by the resources of an innovative tech company. You will be hands-on with complex problems, from orchestration and governance to evaluation and guardrails, shaping the evolution of our platform. We are looking for an engineer who can own ambiguous problems, has experience scaling production agentic systems, and can up-level the team through mentorship and by defining reusable patterns.

$176k - $264k

Klaviyo is seeking a Staff Engineer to join the Customer Agent team, a new and ambitious group focused on building a conversational AI system for brands to serve their customers at scale. This role is based in Boston and requires an in-office presence. You will be instrumental in setting the technical and product direction for a core area of the Customer Agent product, taking ownership of complex, ambiguous problems from conception to production. The team operates with the speed and ownership of a startup, backed by the resources of a leading tech company, and emphasizes shipping production-ready AI systems that make real judgment calls. You will be hands-on, contributing to architecture, writing code, and mentoring other engineers through design reviews, while partnering with product, design, and data science leaders to shape the future of the platform.

$176k - $264k

Klaviyo is seeking a Senior Lead AI Finance Technology Engineer to be the first dedicated AI engineer within the Finance Technology (G&A FinTech) team. This role will reimagine how Finance teams operate in an AI-first world by shaping the architecture, standards, and long-term vision. You will partner across all Finance functions and adjacent technology teams to ensure the back-office stack is reliable, well-integrated, compliant, and ready for a public, AI-forward SaaS business. This position is crucial for defining how AI becomes embedded into Finance at Klaviyo, moving beyond incremental automation to AI-native solutions.

$180k - $270k

Klaviyo is seeking a Senior Software Engineer, Applied AI to join the Customer Agent team, focusing on building the future of Klaviyo's AI-native conversational platform. This role is critical in shaping autonomous service, AI-driven support, and agentic commerce experiences at scale. You will work across the full stack to design, build, and scale systems for intelligent workflows, conversational experiences, tool integrations, retrieval systems, and multi-channel customer engagement. The position involves developing foundational platform capabilities and customer-facing features that allow brands to launch and improve their own AI agents. As a senior engineer, you will tackle complex technical and product challenges, evaluate trade-offs, and provide technical leadership and mentorship, ensuring the delivery of reliable, scalable, and impactful solutions.

$148k - $222k

Klaviyo is building state-of-the-art AI and machine learning technologies to power its products, focusing on software that can run and optimize itself based on outcome or reward metrics. As a Senior Machine Learning Platform Engineer, you will be instrumental in building the core platforms, tools, and infrastructure that ML and AI engineers rely on to create advanced agents and models. This backend-heavy, hands-on role involves driving key technical initiatives for training and deploying models, standardizing feature data, and scaling systems to operate reliably at Klaviyo's data and traffic scale. You will lead technical execution, conduct code and design reviews, author high-impact code, and collaborate with product, ML, data science, and infrastructure partners to deliver durable platforms that accelerate AI development.

$148k - $222k

At Klaviyo, we believe the future of software lies in systems that can run and optimize themselves based on outcome or reward metrics. We have built the infrastructure and application that serve as the interface between businesses and consumers, now serving over 200,000+ customers. We have a significant opportunity to develop state-of-the-art AI and machine learning technologies to power our products and create AI agents that can automatically generate and execute marketing strategies and campaigns. As a Senior Machine Learning Engineer, you will help build models that extract insights from massive data streams, applying cutting-edge techniques from deep learning, recommender systems, and language modeling to integrate AI into our product and deliver customer value. You will work closely with partners in Engineering, Product, and Design, and engage directly with stakeholders and customers to solve challenging problems.

$196k - $294k