Frontend Engineer

Frontend Engineer

Falcon Labs turns the post-transaction experience into an incremental revenue stream for online services and a rewarding moment for their customers. Our solution uses advanced technology and AI to deliver personalized, contextually relevant offers to consumers at their peak engagement moment, right after they complete a transaction.

The moment after a transaction is one of the most underutilized surfaces in commerce: intent is high, trust is established, and attention is real, yet for most brands it still ends with a static confirmation screen. We operate across major e-commerce ecosystems (Shopify, Wix, and a growing set of technology partnerships), earn a take rate on advertiser conversions, and run on real-time decisioning, Snowflake analytics, and an expanding push into agentic automation across the network. We are a team of ad-tech veterans from the mobile advertising world (ironSource/Unity).

The Role

We need a frontend engineer who can build high-performance, responsive ad units and Shopify integrations. You'll work on promotional overlays, embedded widgets, and native Shopify app experiences that handle millions of impressions across desktop and mobile.

What You'll Build

Ad Unit Templates

• Interactive promotional overlays (scratch cards, carousel widgets, post-purchase offers)
• Responsive templates optimized for mobile/desktop conversion
• Performance-critical iframe-based components with cross-origin communication
• A/B testable UI variations with real-time analytics integration

Shopify Integrations

• Custom post-purchase extensions and checkout UI
• Embedded widgets for order status and thank-you pages
• Admin dashboard for merchants to configure placements
• Maintenance and enhancement of existing Shopify apps (legacy, current)

Performance & Optimization

• Lighthouse score optimization (targeting 90+ performance)
• Bundle size reduction and lazy loading strategies
• Image optimization and responsive asset delivery
• Real-time rendering performance profiling

Tech Stack

• Frontend: Next.js 15, React 19, TypeScript, Tailwind CSS
• Shopify: Polaris, Remix, Hydrogen, App Bridge
• Tooling: Webpack, Yarn Workspaces, Playwright, Jest
• Infrastructure: AWS, Docker, Sentry monitoring

What We're Looking For

Core Skills

• 4+ years frontend development with React/Next.js and TypeScript
• Strong CSS skills - responsive design, animations, cross-browser compatibility
• Performance optimization experience (Core Web Vitals, bundle analysis)
• Shopify app development (Polaris, Liquid, App Bridge)
• Understanding of iframe communication, SDK development, or widget embedding

Nice to Have

• E-commerce UI/UX patterns and conversion optimization
• Mobile-first development and touch interactions
• Experience with A/B testing frameworks

Mindset

• Speed matters - you balance velocity with quality
• Pixel-perfect - you care about design details and user experience
• Data-driven - you measure impact through metrics, not opinions
• Ownership - you see problems and fix them without being asked

Why Join?

• High-impact work: Your code directly affects millions in revenue
• Creative freedom: Design and build ad units from scratch
• Modern stack: Work with bleeding-edge React and Next.js features
• Learning culture: AI-first development, conference budget, experimental projects
• Meaningful equity: Ground-floor opportunity at a seed-stage company with traction*

Apply If you're excited about building high-performance e-commerce interfaces and want to own critical frontend infrastructure, we want to hear from you.

How to Apply

Send your CV and a short cover note to:

View email address on click.appcast.io