Klaviyo

Full-stack Engineer

• Own Klaviyo’s approach to enterprise scalability, performance, reliability, and multi-region readiness
• Identify and remove major bottlenecks using production data, profiling, and reproducible benchmarks
• Establish measurable targets for latency, throughput, error rates, and capacity
• Build a shared scale-readiness scorecard and align teams on service-level objectives, error budgets, and performance expectations
• Design and implement sharding, partitioning, caching, back-pressure, workload isolation, and multi-region strategies
• Build safe paths for high-volume data migrations
• Create benchmarks, profiling harnesses, and test environments for independent team use
• Lead scalability reviews and establish release gates
• Lead technical incident deep dives, identify systemic causes, and deliver lasting fixes
• Apply AI-assisted profiling, workload modeling, synthetic traffic, anomaly detection, and guided runbooks with guardrails
• Communicate priorities, tradeoffs, and results to engineers and executives
• Report to the VP of Engineering as a senior individual contributor with no direct reports

Explore Principal Engineer, Enterprise Scalability at Klaviyo. Review requirements and application details.

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Principal Engineer, Enterprise Scalability