Senior Frontend Engineer

Description

• 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.

Requirements

• 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, with 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, 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, 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.

Benefits

• Competitive compensation with performance bonuses • Fully remote option • Health, vision, dental, and life insurance for you and any dependents, with policy premiums covered by the company • Long- & short-term disability insurance • Unlimited PTO • Annual year-end company closure • Optional 401k with 5% matching • 12 paid holidays • Paid lunches in-office; if remote, a $125/week stipend via Sharebite • EAP and employee recognition programs

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