Staff Frontend Software Engineer - Payments and Checkout

Are you passionate about solving complex challenges in the fintech space? We’re looking for talented individuals to join our dynamic startup, backed by Sequoia Capital. We’re building the universal payment layer to unify all currencies—fiat and crypto—so businesses and consumers can transact seamlessly. If you're passionate about creating innovative solutions in a dynamic, fast-paced environment, we want to talk to you.Staff Frontend Engineer (Payments & Checkout)Are you passionate about solving complex challenges in the fintech space? We’re looking for a Staff Frontend Engineer (Payments & Checkout) to join our dynamic startup, backed by Sequoia Capital. We’re building the universal payment layer to unify all currencies - fiat and crypto - so businesses and consumers can transact seamlessly.In this role, you’ll own and evolve our checkout and payment experience - the most critical surface of our product. You’ll work closely with product, design, growth, and backend teams to build fast, seamless, and high-converting payment flows. From reducing friction to improving authorization rates, your work will directly impact revenue and user experience. If you thrive on optimizing user journeys and love building performant, elegant frontend systems, we’d love to chat.What You’ll DoCheckout ownership - Own the end-to-end frontend architecture for our checkout and payment flows across web platformsConversion optimization - Improve checkout conversion rates through UX improvements, performance tuning, and data-driven experimentationExperimentation - Partner with product and growth to run A/B tests, analyze funnel performance, and ship iterative improvements quicklyPayment 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 experiencesIntegration - Collaborate with backend and payments teams to integrate APIs, PSPs, and orchestration layersResilience - Build robust UI systems that gracefully handle edge cases and ensure high reliability during transactionsFrontend standards - Define and drive best practices for frontend architecture, scalability, and maintainabilityMentorship - Act as a technical leader and mentor, raising the bar across the frontend teamCulture carrier - Bring strong product thinking and a conversion-focused mindset into engineering decisionsWhat We’re Looking For7+ years of frontend engineering experience, ideally in fast-paced or startup environmentsDeep 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 iterationStrong understanding of frontend performance optimization and rendering strategiesFamiliarity with payments infrastructure (Stripe, Adyen, Braintree, tokenization, 3DS, etc.)Strong product intuition and ability to translate data into user experience improvementsExcellent collaboration and communication skills across product, design, and growth teamsExperience with global payments, multi-currency flows, or crypto is a bonusOur CultureFast-paced and dynamic – We’re a growing startup that moves quicklyTech-driven – We leverage technology to address our users’ biggest challengesOwnership and communication – We value people who take full ownership and communicate well across teamsContinuous learning – You’ll work alongside industry experts and deepen your expertise in payments and high-performance frontend systemsWhy Join UsCompetitive salary + equity plan21 days PTOBenefits: annual medical allowance, productivity budget, gym membership & wellness subsidyAnnual team retreat tripBe part of a team backed by Sequoia Capital with a healthy runwayRequirements7+ years of experience in frontend engineering, with a focus on high-impact user-facing systemsProficient in modern frontend frameworks and performance optimization techniquesExperience with experimentation, analytics, and conversion-focused developmentStrong understanding of building reliable, scalable UI systemsBachelor's degree or equivalent practical experienceWe are unable to sponsor visas at this time. Preferred: Ability to work hybrid in NYC; open to remote candidates for the right individualApply now and help us build the future of payments at a global scale!Apply now and help us build the future of payments at a global scale!