Senior Performance Engineer (all genders)
Core
Architect and deploy custom Speed Kit implementations to accelerate customer websites by solving complex frontend performance bottlenecks and integrating caching/preloading strategies.
Role type
Senior Performance Engineer (Frontend)
Builds
Custom JavaScript solutions, Service Worker integrations, and automated tooling for CI/CD pipelines
Domain
Web Performance, Frontend Engineering, E-commerce
Deliverable
product features
Required skills
Vanilla JavaScript, DOM manipulation, browser rendering pipelines, HTTP network layer, Service Worker lifecycles, caching strategies, Real User Monitoring (RUM) analysis, Core Web Vitals auditing
Preferred skills
E-commerce stack experience, agency client work, predictive preloading, lazy-loading optimization
Technologies
Service Workers, Bloom filters, CI/CD pipelines, RUM stack
Responsibilities
Analyze real-world user data to identify critical rendering path bottlenecks; Engineer custom JavaScript solutions for edge cases like broken slider frameworks and flicker control; Prototype new features and build automated tooling for integration lifecycle; Audit complex e-commerce architectures for Core Web Vitals bottlenecks.
Seniority
Senior, hands-on IC
