Senior Platform Engineer — Core Services & DX (In-Office)

Klaviyo; Boston (MA); On-site; USD 148,000 - 222,000; Full time

Job summary

Klaviyo is seeking a Senior Software Engineer for our Platform Engineering team in Boston. You will own design and development of foundational platform services that empower product teams to move faster with confidence.

The role emphasizes building scalable, reliable systems using Python, Go, AWS, and Kubernetes, and requires mentoring other engineers. You will work in an in-office environment 5 days a week, collaborating across teams to deliver infrastructure primitives that improve

Qualifications

• BA/BS in Computer Science or related field, or equivalent experience.
• 5+ years operating and scaling complex distributed systems.
• Experience in cloud-native environments.
• Proven experience with Python and Go development.
• Experience operating Kubernetes at scale.
• Experience with Terraform.
• Fundamental Linux networking knowledge.
• Exposure to platform areas such as API gateways, observability, or async tooling.
• Interest in exploring AI tools and responsible adoption.

Responsibilities

• Ship foundational platform services enabling faster product team delivery.
• Design, develop, and deliver software improving availability, scalability, and latency of core platforms.
• Guide engineering needs and craft platform primitives (Infra, Databases, Queuing).
• Mentor and pair with engineers to improve performance and reliability.
• Develop with Python, Go, AWS, and Kubernetes to advance the platform.

Skills

Python

Go

Kubernetes

Terraform

Linux networking

Cloud-native

Distributed systems

Education

BA/BS in Computer Science or equivalent

Tools

AWS

CI/CD

Job description

Klaviyo is seeking a Senior Software Engineer for our Platform Engineering team in Boston. You will own design and development of foundational platform services that empower product teams to move faster with confidence.

The role emphasizes building scalable, reliable systems using Python, Go, AWS, and Kubernetes, and requires mentoring other engineers. You will work in an in-office environment 5 days a week, collaborating across teams to deliver infrastructure primitives that improve