Senior Frontend Engineer — Remote, Equity & High-Perf UI

falconlabs.com; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Remote work

Equity opportunity

Learning budget

Job summary

Falcon Labs is seeking a frontend engineer to build high-performance, responsive ad units and Shopify integrations that handle millions of impressions across desktop and mobile. You will own interactive components, ensure cross-browser compatibility, and contribute to the merchant-facing admin dashboard and analytics.

Collaborate on a modern stack with Next.js, React, and TypeScript, drive performance improvements, and ship iframe-based widgets and post-purchase extensions.

Qualifications

• 4+ years of frontend development experience with React, Next.js, and TypeScript.
• Strong CSS skills across responsive design and cross-browser compatibility.
• Experience optimizing performance including Core Web Vitals and bundle analysis.
• Shopify app development experience using Polaris, Liquid and App Bridge.
• Understanding iframe communication and widget embedding patterns.

Responsibilities

• Build interactive ad unit templates optimized for mobile and desktop conversion.
• Develop iframe-based components with cross-origin communication.
• Create A/B testable UI variations wired into real-time analytics.
• Ship Shopify post-purchase extensions, checkout UI, and embedded widgets.
• Maintain and extend Shopify apps and a merchant-facing admin dashboard.
• Drive performance work including Lighthouse optimization and image optimization.

Skills

React

Next.js

TypeScript

CSS

Performance optimization

Iframe/SDK patterns

Tools

Shopify Polaris

Shopify Liquid

Shopify App Bridge

Job description

Falcon Labs is seeking a frontend engineer to build high-performance, responsive ad units and Shopify integrations that handle millions of impressions across desktop and mobile. You will own interactive components, ensure cross-browser compatibility, and contribute to the merchant-facing admin dashboard and analytics.

Collaborate on a modern stack with Next.js, React, and TypeScript, drive performance improvements, and ship iframe-based widgets and post-purchase extensions.