Principal Engineer • Senior

Who you are

You have over 10 years of experience in software engineering, with a strong focus on scalability and performance optimization. Your background includes leading architectural changes and driving system improvements across multiple teams. You possess deep technical expertise in Java and cloud technologies, particularly AWS, and have hands-on experience with containerization using Docker and orchestration with Kubernetes. You are skilled at defining metrics for success and aligning teams to achieve service level objectives (SLOs). Your communication skills allow you to effectively convey technical concepts to both technical and non-technical stakeholders, ensuring alignment on business impacts and customer outcomes.

Desirable

Experience with multi-region architectures and high-volume data migrations is a plus. Familiarity with performance benchmarking and profiling tools will help you excel in this role. You are comfortable working in a fast-paced environment and can adapt to changing priorities while maintaining a focus on delivering high-quality results.

What you'll do

As the Principal Engineer at Klaviyo, you will define enterprise scalability fitness functions, focusing on latency, throughput, and error rates. You will design and implement sharding and partitioning strategies, as well as caching and back-pressure mechanisms to enhance system performance. Your role will involve building lightweight enablement tools such as benchmarks and reproducible testbeds, collaborating closely with teams to implement fixes and improvements. You will lead scalability reviews and readiness gates that facilitate delivery without hindering progress, ensuring that incident deep dives are tied to systemic fixes. Your ability to communicate clearly with executives and engineers will be crucial in tying technical work to business impact and customer outcomes.

What we offer

Klaviyo fosters a culture of empowerment and inclusivity, where diverse backgrounds and experiences are valued. You will have the opportunity to work on impactful projects that drive the company's mission forward. We offer competitive compensation and benefits, along with a supportive environment that encourages professional growth and development. Join us in shaping the future of our platform and making a difference for our customers.