Senior Staff Engineer, AI-Powered Customer Agent

Klaviyo Inc.; Boston, Northern (MA, KY); Hybrid; USD 216,000 - 324,000; Full time

Job summary

Klaviyo in Boston is seeking a Senior Staff Engineer, Applied AI for the Customer Agent team. You will set technical and product direction, build production agentic systems, and stay hands-on to shape the platform’s evolution with speed and ownership.

You will lead architecture, orchestration, evals, guardrails, and non-deterministic failure handling while partnering with product, design, data science, and GTM to drive the roadmap.

Qualifications

• Architected, built, scaled, and supported a production agentic system end to end.
• Led multi-team collaboration and ensured reliability for non-deterministic AI platforms.
• Hands-on coding, design reviews, and architecture decisions.

Responsibilities

• Set the technical and product direction for Customer Agent's core platform, from architecture through production.
• Take on the platform's hardest technical problems personally: orchestration, evaluation, guardrails, memory & context, self-healing/improving and failure handling for non-deterministic systems.
• Write and ship code, review designs, and make the calls other engineers can't make alone.
• Build architecture and frameworks that other engineers and teams adopt, and mentor through design reviews rather than direct management.
• Partner with product, design, data science, and go‑to‑market leaders to shape the roadmap, not just execute against it.
• Evaluate emerging AI technologies and bring the ones worth betting on into production.

Skills

Production-grade architecture

Agentic systems

End-to-end leadership

Code contributor

Job description

Klaviyo in Boston is seeking a Senior Staff Engineer, Applied AI for the Customer Agent team. You will set technical and product direction, build production agentic systems, and stay hands-on to shape the platform’s evolution with speed and ownership.

You will lead architecture, orchestration, evals, guardrails, and non-deterministic failure handling while partnering with product, design, data science, and GTM to drive the roadmap.