Staff Frontend Software Engineer - Payments and Checkout

Breeze; New York (NY); Hybrid; USD 130,000 - 180,000; Full time

Benefits offered by this job

Competitive salary + equity plan

21 days PTO

Annual medical allowance

Productivity budget

Gym membership

Wellness subsidy

Annual team retreat trip

Backed by Sequoia Capital

Job summary

A dynamic fintech startup based in New York City is looking for a Staff Frontend Engineer specializing in Payments and Checkout. This role involves owning and evolving the checkout experience, enhancing conversion rates, and optimizing payment flows across web platforms. The ideal candidate will have 7+ years of frontend engineering experience, deep expertise in building payment systems, and proficiency in modern frameworks like React and Next.js. This position offers competitive salary and equity, along with health benefits, 21 days PTO, and a fast-paced work culture.

Qualifications

• 7+ years of frontend engineering experience, with a focus on user-facing systems.
• Deep hands-on experience building and optimizing checkout or payment flows.
• Strong proficiency in modern frontend frameworks.

Responsibilities

• Own the end-to-end frontend architecture for checkout and payment flows.
• Improve checkout conversion rates through UX improvements.
• Partner with product and growth to run A/B tests.

Skills

Frontend engineering experience

Building and optimizing checkout or payment flows

Modern frontend frameworks (React, Next.js)

Conversion rate optimization

Frontend performance optimization

Payments infrastructure familiarity

Product intuition

Collaboration skills

Global payments, multi-currency flows, or crypto

Education

Bachelor’s degree or equivalent practical experience

Job description

Staff Frontend Engineer (Payments & Checkout)

New York City

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.

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

Requirements:

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

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

Benefits:

• Competitive salary + equity plan
• 21 days PTO
• Health 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

Apply now and help us build the future of payments at a global scale!