Senior Frontend Engineer (Performance)

New

Multi Media, LLCLive Streaming

United StatesFull-TimeSenior

Salary$180,000 - $215,000 annually.

Apply NowOpens the employer's application page

Job Details

Bachelor’s degree in Computer Science or related field (or equivalent practical experience).
Deep expertise in modern front-end frameworks (React, Angular, Vue, Svelte, etc), TypeScript, JavaScript, HTML, and CSS.
Experience operating in a front-end heavy high-traffic consumer web application.
Expert-level proficiency with Chrome DevTools, React Profiler, Lighthouse, CPU profiles, flame charts, network waterfalls, and performance traces.
Senior-level technical leadership skills, including identifying high-impact work independently and influencing architecture decisions.
Strong understanding of browser internals, including JavaScript execution, style calculation, layout, painting, rasterization, and compositing.
Proven experience improving Core Web Vitals, including Largest Contentful Paint, Interaction to Next Paint, and Cumulative Layout Shift using real-user data.
Hands-on experience diagnosing memory leaks using heap snapshots, allocation profiles, garbage-collection analysis, and detached DOM-node detection.
Ability to optimize rendering, hydration, bundle size, code splitting, main-thread work, third-party scripts, and frontend asset delivery.

Diagnose, triage, and lead resolution for issues involving unnecessary renders, long tasks, memory leaks, forced reflows, layout shifts, expensive painting, and excessive JavaScript execution.
Define and improve measurable performance targets using real-user monitoring, Lighthouse, synthetic testing, Chrome DevTools traces, and product-level business metrics.
Establish performance budgets, dashboards, and alerts.
Raise the performance capabilities of the broader organization through technical talks, workshops, documentation, mentoring, code reviews, and reusable tooling.

View Full Description & ApplyYou'll be redirected to the employer's site