CareerPlan

Software Engineer, Conversational Products & Agent Workflows

BostonFull-time$116k–$174k2026-10-22 → 2026-11-10

Core

Build scalable backend systems and AI-powered product experiences for Klaviyo's Customer Agent platform, enabling agents to retrieve context, use tools, and take reliable action on behalf of customers.

Role type

Senior backend software engineer (AI/Agentic systems)

Builds

Scalable backend systems, APIs, and production agentic features for an AI-native conversational platform

Domain

Ecommerce, Customer Experience, Applied AI

Deliverable

production ML models

Required skills

Python, FastAPI/Django, asynchronous processing, distributed systems, database design, cloud infrastructure, system reliability engineering, customer-facing product development

Preferred skills

LLM fine-tuning, reinforcement learning, AI evaluation infrastructure, inference optimization

Technologies

Python, FastAPI, Django, Celery, Kafka, SQS, RabbitMQ, Redis, AWS, Kubernetes, CI/CD

Responsibilities

Build and improve reliable backend systems and APIs; Develop production agentic features involving tool use and orchestration; Contribute to solving applied AI problems (RAG, hallucination mitigation); Build evaluation approaches for AI systems; Improve system reliability through guardrails and observability; Build asynchronous and distributed processing workflows; Participate in on-call rotation for production incidents

Seniority

Senior, hands-on IC