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 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

Our Culture:

Fast-paced and dynamic – We’re a growing startup that moves quickly

Tech-driven – We leverage technology to address our users’ biggest challenges

Ownership and communication – We value people who take full ownership and communicate well across teams

Continuous learning – You’ll work alongside industry experts and deepen your expertise in payments and high-performance frontend systems

Why Join Us:

Competitive salary + equity plan

21 days PTO

Benefits: annual medical allowance, productivity budget, gym membership & wellness subsidy

Annual team retreat trip

Be part of a team backed by Sequoia Capital with a healthy runway

Requirements:

7+ years of experience in frontend engineering, with a focus on high-impact user-facing systems

Proficient in modern frontend frameworks and performance optimization techniques

Experience with experimentation, analytics, and conversion-focused development

Strong understanding of building reliable, scalable UI systems

Bachelor's degree or equivalent practical experience

We are unable to sponsor visas at this time.

Preferred: Ability to work hybrid in NYC; open to remote candidates for the right individual

Apply 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!