Senior FS Engineer

7 hours ago

Kyiv Kyiv city Israel CommIT Full time ₪100,000 - ₪120,000 per year

The company is revolutionizing e-commerce advertising by connecting post-purchase shoppers with relevant cross-sell opportunities. Our platform powers promotional ad experiences that appear immediately after checkout, helping shoppers discover complementary products while helping merchants drive incremental revenue.

We're a seed-stage company tackling complex, 0→1 ad-tech challenges — from real-time bidding and analytics infrastructure to high-performance frontend experiences that run across millions of checkouts every day.

  • High impact: Your work directly affects millions of users and drives real revenue.
  • Complex challenges: Build ad-serving systems, analytics engines, and seamless Shopify integrations.
  • Collaborative culture: Work closely with technical founders who ship fast and care deeply about engineering craft.
  • AI-forward: We leverage AI across product, automation, and development — and you'll be encouraged to as well.

Responsibilities:

  • Interactive ad units (post-purchase overlays, carousels, scratch cards).
  • Responsive templates optimized for conversion and performance.
  • Embedded Shopify widgets, checkout extensions, and admin dashboards.
  • A/B testable UIs with analytics instrumentation.

Tech Stack:

  • Frontend: 15, React 19, TypeScript, Tailwind CSS
  • Shopify: Polaris, Hydrogen (Remix), App Bridge
  • Backend & Infra: , AWS, Docker
  • Testing: Playwright, Jest

Requirements:

  • 5+ years of frontend development experience with and TypeScript.
  • Strong CSS, animations, and responsive design skills.
  • Experience with Shopify app development and iframe-based components.
  • Performance optimization and Core Web Vitals expertise.

Mindset: Pixel-perfect, fast-moving, and data-driven.

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