Klaviyo

Senior Software Engineer, Agent Platform

Klaviyo
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2 months ago
Boston, MA, USASenior
H1B Sponsor

Base Salary

$148k - $222k/yr

Responsibilities

  • Design and build backend systems that scale AI solutions for more than 167,000 customers.
  • Contribute to agentic architecture supporting performant AI agents.
  • Build tools to tune LLM-based features, deploy agents, and support MCP and RAG in production.
  • Evaluate AI agent performance using tools including Arize, OpenAI, Bedrock, LangChain, vLLM, and Ray.
  • Develop reliable, scalable data pipelines and APIs for AI systems.
  • Collaborate with product managers, ML engineers, and data scientists to deliver AI products at scale.

Requirements

  • At least 5 years of experience as a backend software engineer building scalable, distributed systems.
  • Strong experience working in production environments and launching ML/AI projects.
  • Hands-on production experience with generative AI and agentic AI applications.
  • Proficiency in Python or a similar programming language.
  • Experience collaborating with cross-functional technical partners.
  • Preferred experience with big data tools such as Apache Spark and Ray.
  • Preferred familiarity with AWS, Terraform, and Kubernetes.
  • Preferred knowledge of Hugging Face, PyTorch, TensorFlow, and Keras.

Benefits

  • Hybrid role based in Boston.
  • Comprehensive health, welfare, and wellbeing benefits based on eligibility.
  • May include annual cash bonus, equity, and sign-on payments.
  • Up to 10% travel may be required for onboarding, client or partner work, team meetings, and industry events.
Klaviyo

About Klaviyo

1,001-5,000 employees

Klaviyo (NYSE: KVYO) is the autonomous B2C CRM. Powered by its built-in data platform and AI, Klaviyo combines marketing automation, analytics, and customer service into one unified solution, making it easy for businesses to know their customers and grow faster. Klaviyo (CLAY-vee-oh) helps over 193,000 brands like Mattel, Glossier, Daily Harvest, and Liquid Death deliver 1:1 experiences at scale, improve efficiency, and drive revenue.