Senior Frontend Performance Engineer|Remote + Unlimited PTO

Multi Media LLC

United States

Remote

USD 180,000 - 215,000

Full time

14 days+

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Benefits offered by this job

Fully remote option

Health, vision, dental, and life

Unlimited PTO

401k with 5% matching

12 paid holidays

Job summary

Multi Media LLC is seeking a Senior Frontend Engineer focused on frontend performance tuning and optimization to join the Viewer team. You will profile production bottlenecks, analyze memory usage, and help shape performance strategies for high-traffic experiences across search, video, and navigation.

The role requires deep expertise in modern front-end frameworks, TypeScript, JavaScript, HTML, and CSS, with senior-level technical leadership.

Qualifications

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.
Senior-level technical leadership skills, including identifying high-impact work independently, influencing architecture decisions, and advising teams outside your immediate area.
Strong understanding of browser internals, including JavaScript execution, style calculation, layout, painting, rasterization, and compositing.
Proven experience improving Core Web Vitals 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.

Responsibilities

Diagnosing, triaging, and leading to resolution 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.