Klaviyo
Sr. Lead Software Engineer
$216K–$324K
Boston, MA +1 · Senior · Full-time · Posted Oct 16, 2026
- Location
- Boston, MA
Boston, Massachusetts, United States - Experience
- 8+ years of professional software engineering experience.
About the job
Leads the architecture and scaling of Klaviyo’s core orchestration platform, integrating agentic AI capabilities and advancing AI-native engineering practices.
What you'll do
- Architect and scale high-traffic, low-latency orchestration services with high reliability.
- Drive integration of AI-driven agentic workflows and automated decision-making, including AI evaluation frameworks.
- Set technical direction, develop shared frameworks, mentor engineers, and partner on strategic roadmaps.
What they ask for
- 8+ years of professional software engineering experience focused on distributed systems, microservices, and high-availability backend platforms.
- Hands-on experience shipping production LLM workflows, RAG pipelines, or agentic frameworks, with understanding of evaluations, prompt architecture, and fine-tuning.
- Deep Python proficiency and experience with modern frameworks, data processing platforms, and ORM tools.
- Strong expertise with AWS, Kubernetes, CI/CD automation, observability, and event-driven, asynchronous systems.
Nice to have
- Experience designing or integrating shared AI/ML platforms for multiple engineering teams.
- Domain expertise in MarTech, e-commerce, personalization, or real-time event streaming.
Pay
$216,000 — $324,000 USD (base salary)
Tools
Python, FastAPI, Django, Kafka, Celery, SQS, Redis, AWS
AI focus
Production LLM workflows, RAG pipelines, agentic frameworks, automated decision-making, AI model evaluations, and AI-native software development practices.
Model-written summary · the original posting is authoritative