Senior Performance Engineer, Data Products

About this role

*This is a fully remote role within the United States.*

We’re looking for a product-minded Senior Performance Engineer to improve how our products interact with large, complex healthcare datasets. This role uses Data Science skills to drive Product Experience outcomes, by iterating to improve the performance of our Data Platform.

The work is analytical, and the outcome is practical: a faster, more scalable product. You’ll investigate existing performance problems, anticipate the impact of future product and dataset changes, shipping improvements across the full system—from data architecture and query execution to API request patterns and user experience.

Success in this role means being able to demonstrate outcomes such as:

• A critical filter and data-source combination is now x% faster in production
• An incoming dataset change is expected to increase latency by y%, and we have a mitigation plan before launch
• A product workflow now uses z% fewer ClickHouse resources without compromising the user experience

## Responsibilities

• Own performance investigations across the product and data stack, moving from slow queries or poor user experiences to measurable root causes and production improvements
• Design and evaluate data architecture changes
• Partner with Product, frontend, and backend engineers to adapt product behavior to the characteristics of the underlying data through techniques such as request batching, debouncing, caching, pagination…
• Develop representative benchmarks for important combinations of filters, datasets, and product workflows
• Measure query latency, throughput, concurrency, and infrastructure consumption, with particular attention to datastore performance and cost (we use ClickHouse Cloud)
• Evaluate the likely performance impact of upstream dataset changes before they reach production
• Assess future product requests and recommend technical or product approaches that balance functionality, responsiveness, scalability, and cost
• Pr...