Senior Frontend Engineer (Performance)

About Our Client

The organization operates one of the world's most heavily trafficked live streaming platforms, supporting a global network of independent content creators and millions of real-time viewers. It addresses challenges in delivering interactive video at scale, managing complex broadcasting, low-latency streaming, and providing high-engagement user experiences.

About the Opportunity

The Senior Frontend Engineer (Performance) will focus on frontend performance tuning and optimization within the Viewer team. This role is key to enhancing high-traffic experiences across various core platform areas by diagnosing rendering and execution issues, improving performance metrics, and setting organizational standards for frontend efficiency.

Responsibilities

• Diagnose and resolve issues related to excessive renders, long tasks, memory leaks, layout shifts, and heavy JavaScript execution.
• Define and improve measurable performance targets using monitoring tools and business metrics.
• Establish and maintain performance budgets, dashboards, and alerts.
• Elevate organizational performance expertise through technical talks, workshops, documentation, mentoring, and tooling.

Requirements

• Bachelor's degree in Computer Science or related field, or equivalent experience.
• Deep expertise in modern frontend frameworks (React, Angular, Vue, Svelte, etc.), TypeScript, JavaScript, HTML, and CSS.
• Expert proficiency with Chrome DevTools, React Profiler, Lighthouse, CPU profiles, and performance analysis tools.
• Senior-level technical leadership with ability to influence architecture and advise cross-functional teams.
• Strong understanding of browser internals including JavaScript execution, layout, painting, and compositing.
• Proven experience improving Core Web Vitals using real-user data.
• Hands-on experience diagnosing memory leaks and optimizing frontend performance aspects such as rendering and asset delivery.

Pay

The base salary range for this position is $180,000 to $215,000 annually, excluding additional compensation or benefits.

Benefits

• Competitive compensation with performance bonuses.
• Fully remote work option.
• Health, vision, dental, and life insurance with premiums covered.
• Long- and short-term disability insurance.
• Unlimited paid time off.
• Annual year-end company closure.
• Optional 401(k) with 5% matching.
• Twelve paid holidays.
• Paid lunches in-office or $125/week stipend for remote employees.
• Employee assistance and recognition programs.