Klaviyo

Klaviyo

Senior Lead AI Software Engineer

Boston, MA · Senior

Work authorization requiredDetected 29 days ago
TypeScriptPythonReactDjangoFastAPIFull-Stack DevelopmentMySQLRedisAWSKubernetesTerraformKafkaRabbitMQLLMsRAGIncident ResponseCustomer SupportLeadershipMentoring

About the role

  • If you're a close but not exact match with the description, we hope you'll still consider applying.

Responsibilities

  • The Amplify team builds the internal platforms, automation, and AI-driven systems that power how Klaviyos work every day.
  • As a Senior Lead Software Engineer on Amplify, you will:
  • Independently own and drive high-impact objectives that span multiple Amplify teams and align with company priorities, defining the technical roadmap that ensures our internal applications, APIs, data and event pipelines, and AI-powered workflows can scale with Klaviyo and continue delivering measurable business outcomes.
  • Define and communicate forward-looking technical strategy that integrates input from Product, Design, Data, and operational partners, and use that strategy to lead technical discussions and influence the roadmaps of adjacent teams whose work intersects with Amplify.
  • Own the response to complex performance, scalability, and reliability issues across Amplify systems, working side by side with teams in the trenches during incidents, owning mistakes, and turning post-incident learnings into changes that prevent recurrence and raise the bar across the organization.
  • Define and own the operational standards Amplify holds itself to, including SLOs, monitoring and alerting, incident response, security, observability, and cost, and continuously evolve them as usage and complexity grow.
  • Invest in the growth of engineers across levels at Amplify, with a particular focus on developing emerging Senior and Lead engineers through design reviews, pairing, RFC feedback, and intentional one-on-one coaching, and participate actively in senior engineering hiring to represent Klaviyo's technical challenges and culture.

Requirements

  • BA or BS Degree in Computer Science, related field, or equivalent experience.
  • 12+ years of experience in software development with deep knowledge of computer science fundamentals, domain-driven design, and architectural patterns for distributed, multi-tenant systems.
  • You are an AI-native engineer and leader.
  • You are highly effective at working through influence and delegation.
  • You enjoy questioning convention and continuously improving how things work - architecture, tooling, workflows, or processes - and you know how to introduce change while bringing people along with you.

Nice to have

  • Experience designing and operating large-scale services on AWS with infrastructure as code (Terraform) and containerized environments (Kubernetes), including capacity planning, cost optimization, and disaster recovery.
  • Technologies We Use
  • Klaviyo's platform is primarily built with Python and React and runs on AWS.
  • Core technologies include:
  • Python / Django / FastAPI
  • TypeScript / React
  • MySQL / Redis / Memcached
  • RabbitMQ / Celery / Apache Kafka / Apache Pulsar

Skills

  • Want to learn more about life at Klaviyo?
  • Team Overview
  • The work is highly visible and has a direct impact on how thousands of Klaviyos get their work done every day.
  • How You'll Make an Impact

Company info

  • Independently lead the end-to-end lifecycle of large, multi-team initiatives with clear technical direction, architectural leadership, and active workstream curation, from discovery and design through implementation, rollout, and long-term ownership of complex programs that span internal customers across the company.
  • Use modern AI tools - coding assistants, agentic workflows, RAG pipelines, and evaluation harnesses - as a core part of your day-to-day workflow, define guardrails for building AI-powered systems responsibly, and help the broader engineering organization adopt AI effectively in design, coding, testing, and operations.

Visa & Work Authorization

  • Klaviyo supports work authorization and relocation for this position.
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This listing is sourced directly from Klaviyo's careers page and normalized into a canonical job model.