Frontend Engineer
Location: Remote - Global
Stage: Seed-stage Ad-Tech Startup
Team: Lean, high-impact engineering team
Compensation: Competitive package + equity
About Falcon Labs
Falcon is revolutionizing e-commerce advertising by connecting post-purchase shoppers with relevant cross-sell opportunities. We're building promotional ad units that appear when shoppers complete a purchase, seamlessly connecting them to complementary products on partner sites.
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.
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