At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you’re a close but not exact match with the description, we hope you’ll still consider applying.
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Senior Software Engineer – Agent Platform
This backend-heavy role gives you opportunities to influence architecture, async processing, and distributed systems. You’ll collaborate closely with product managers, ML engineers, and data scientists to deliver real-world impact at scale. The role is hybrid and based in Boston.
How you’ll make a difference- Design and build backend systems to scale AI solutions for 167K+ customers.
- Contribute to our agentic architecture to support performant AI agents.
- Build tools to tune LLM-based features, deploy agents, MCP and RAG in production, and evaluate performance using tools like Arize, OpenAI, Bedrock, LangChain, vLLM and Ray.
- Develop reliable, scalable data pipelines and APIs for AI systems.
- Foster a culture of ownership, experimentation, and customer-first thinking.
- 5+ years of experience as a backend software engineer, building scalable, distributed systems.
- Strong experience working in production environments and launching ML/AI projects.
- Hands‑on experience with generative AI and agentic AI applications in production.
- Proficient in Python (or similar).
- Comfortable collaborating with cross‑functional technical partners.
- Curious, proactive, and eager to learn.
- Experience with big data tools (e.g., Apache Spark, Ray).
- Familiarity with cloud infrastructure (AWS, Terraform, Kubernetes).
- Knowledge of ML frameworks (Huggingface, PyTorch, TensorFlow, Keras). xayajpt
We use Covey as part of our hiring process.
