Staff Frontend Software Engineer - Payments and Checkout

What You’ll Do

• Checkout ownership - Own the end-to-end frontend architecture for our checkout and payment flows across web platforms
• Conversion optimization - Improve checkout conversion rates through UX improvements, performance tuning, and data-driven experimentation
• Experimentation - Partner with product and growth to run A/B tests, analyze funnel performance, and ship iterative improvements quickly
• Payment UX - Build seamless flows for complex payment states including retries, failures, and authentication (3DS, etc.)
• Performance - Optimize frontend performance (Core Web Vitals, latency, rendering) to ensure fast and reliable checkout experiences
• Integration - Collaborate with backend and payments teams to integrate APIs, PSPs, and orchestration layers
• Resilience - Build robust UI systems that gracefully handle edge cases and ensure high reliability during transactions
• Frontend standards - Define and drive best practices for frontend architecture, scalability, and maintainability
• Mentorship - Act as a technical leader and mentor, raising the bar across the frontend team
• Culture carrier - Bring strong product thinking and a conversion-focused mindset into engineering decisions

What We’re Looking For

• 7+ years of frontend engineering experience, ideally in fast-paced or startup environments
• Deep hands-on experience building and optimizing checkout or payment flows (must-have)
• Strong proficiency in modern frontend frameworks (React, Next.js, etc.)
• Experience improving conversion rates through experimentation, analytics, and UX iteration
• Strong understanding of frontend performance optimization and rendering strategies
• Familiarity with payments infrastructure (Stripe, Adyen, Braintree, tokenization, 3DS, etc.)
• Strong product intuition and ability to translate data into user experience improvements
• Excellent collaboration and communication skills across product, design, and growth teams
• Experience with global payments, multi-currency flows, or crypto is a bonus