Klaviyo
Full Stack Software Engineer - People Systems
$140K–$210K
San Francisco, CA +1 · Full-time · Posted Jul 30, 2026
- Location
- San Francisco, CA
Boston, Massachusetts, United States - Experience
- 5+ years of engineering or data engineering experience, with 2+ years building AI/ML or LLM-powered solutions.
About the job
Build and lead AI-powered systems that transform People workflows and embed responsible AI across Klaviyo’s employee lifecycle.
What you'll do
- Design AI-powered workflows, copilots, and agents for People processes, integrating SaaS and internal platforms.
- Set technical standards for AI system design, evaluation, security, testing, and observability; guide responsible handling of sensitive employee data.
- Identify and measure opportunities for AI-native operations, and enable People teams through reusable tools, playbooks, and training.
What they ask for
- 5+ years of engineering or data engineering experience, including 2+ years building AI/ML or LLM-powered solutions with tangible business outcomes.
- Proven ability to set technical direction and build 0→1 systems with organizational impact.
- Experience with Python, SQL, modern APIs, LLM platforms, and AI-powered workflows, agents, or copilots.
- Experience integrating enterprise SaaS systems and designing scalable systems, automation frameworks, and internal tools; responsible AI experience with sensitive data.
Nice to have
- Experience with People/HR systems such as Workday, Greenhouse, or Sana.
- Familiarity with n8n, Workato, or Zapier; experience in high-growth SaaS or AI governance/internal AI platforms.
Pay
$140,000 — $210,000 USD (base salary)
Tools
Python, SQL, OpenAI, Claude, Gemini, LangChain, LangGraph, Workday
AI focus
Foundational AI engineering for People systems: building AI workflows, copilots, and agents; defining architecture and standards; and embedding responsible AI into employee lifecycle operations.
Model-written summary · the original posting is authoritative