# Senior Software Engineer, Agent Runtime & Customer Workflows at Klaviyo

- Company: Klaviyo
- What the company does: Klaviyo unifies AI-powered email marketing and SMS to drive growth, retention, and measurable results. Build personalized, omnichannel experiences across WhatsApp, ecommerce, and more with K:AI Agents. Backed by Accel.
- Company website: https://www.klaviyo.com/
- Type: Startups
- Level: Senior
- Location: Boston, MA
- Work setup: On-site
- Posted: 2026-10-22
- Apply by: 2026-12-06
- Apply: https://www.klaviyo.com/careers/jobs/8041055003?gh_jid=8041055003&utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/klaviyo-senior-software-engineer-agent-runtime-and-customer-workflows/

## About the role

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. Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- You have 5-7 years of professional software engineering experience , with a strong foundation in backend systems and distributed applications
- You have hands-on experience building and deploying generative AI or agentic AI applications into production for real users
- You are proficient in Python and modern backend frameworks such as FastAPI or Django
- You have experience with asynchronous processing and distributed task or event systems such as Celery, Kafka, SQS, RabbitMQ, or Redis
- You have strong knowledge of databases, data modeling, APIs, and persistence patterns used in production systems
- You are comfortable working in cloud-native environments with technologies such as AWS, containers, Kubernetes, infrastructure automation, or CI/CD systems

Tags: Engineering

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/klaviyo-senior-software-engineer-agent-runtime-and-customer-workflows/