Klaviyo

Principal Software Engineer, Enterprise Scalability

Klaviyo
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3 months ago
Boston, MA, USAStaff+
H1B sponsor

Base Salary

$244k - $366k/yr

Responsibilities

  • Define enterprise scalability fitness functions covering latency, throughput, and error rates, and align teams to SLOs and budgets.
  • Design and implement sharding, partitioning, caching, back-pressure, multi-region readiness, and high-volume migration strategies.
  • Build benchmarks, profiling harnesses, and reproducible testbeds, and partner with teams to implement fixes.
  • Lead scalability reviews and readiness gates and conduct incident deep dives tied to systemic improvements.
  • Communicate technical tradeoffs and business impact to executives and engineers across the organization.
  • Integrate responsible AI into scale and resiliency work, including anomaly detection, synthetic load generation, and guided runbooks.

Requirements

  • 12+ years of experience scaling multi-tenant SaaS systems.
  • Expertise in performance engineering, capacity planning, sharding and partitioning, caching and back-pressure, multi-region readiness, and high-volume migrations.
  • Experience removing major bottlenecks and demonstrating measurable impact with data.
  • Ability to align teams through scalability fitness functions, scorecards, readiness gates, and clear communication with executives and engineers.
  • Experience or interest in applying AI to profiling, workload modeling, synthetic traffic generation, anomaly detection, and runbook assistance with appropriate guardrails and observability.
  • Ability to lead through technical depth and hands-on impact without direct reports.

Benefits

  • Comprehensive health, welfare, and wellbeing benefits based on eligibility.
  • Potential annual cash bonus, equity, sign-on payments, and other total compensation components based on eligibility.
  • Up to 10% travel may be required for onboarding, client or partner work, team meetings, and industry events, coordinated in advance.

Categories

Klaviyo

About Klaviyo

1,001-5,000 employees

Klaviyo builds a subscription SaaS platform that lets e-commerce and consumer brands use first-party data to run targeted email, SMS, and push campaigns, with built-in automation and analytics. The product also includes B2C CRM features for segmentation, A/B testing, and customer lifecycle workflows. Founded in 2012 and headquartered in Boston, it is a public company (NYSE: KVYO) used by brands such as Mattel and Glossier.

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