Y Combinator React Native Engineer, Merchant Experience Mobile
Summary
Senior React Native Engineer at Stripe in Barcelona building mobile applications for merchants. Work with React Native, TypeScript, and JavaScript to develop high-performance mobile experiences, own architectural decisions, and mentor other engineers.
Who we are
About Stripe
Stripe is a financial infrastructure platform for businesses. Millions of companies—from the world's largest enterprises to the most ambitious startups—use Stripe to accept payments, grow their revenue, and accelerate new business opportunities. Our mission is to increase the GDP of the internet, and we have a staggering amount of work ahead. That means you have an unprecedented opportunity to put the global economy within everyone's reach while doing the most important work of your career.
About the team
We're a mobile engineering team based in Barcelona, focused on building world-class mobile applications that deliver excellent user experiences for Stripe merchants. React Native is at the core of how we build—it lets us move fast, share code across platforms, and ship high-quality experiences to millions of businesses worldwide without compromise.
As a Senior Mobile Engineer on our team, you'll help shape our React Native architecture, set the bar for engineering quality, and play a meaningful role in defining what great mobile development looks like at Stripe. This is a high-impact role where your decisions will be felt across the product—and across the millions of merchants who depend on our apps every day.
What you'll do
As a Senior Mobile Engineer, you'll own significant parts of our React Native codebase, lead architectural decisions, and help grow the team around you. You'll work closely with product, design, and cross-functional partners to deliver polished, performant mobile experiences.
Responsibilities
- Spearhead the design and development of critical product features, partnering with cross-functional teams to transform complex requirements into seamless, high-performance mobile experiences
- Champion the integration of AI and cutting-edge development tools to drive efficiency, elevate code standards, and cultivate a culture of AI-assisted engineering
- Own architectural decisions for the mobile layer—including navigation, state management, native module integration, and performance strategy
- Drive code quality through thorough code reviews, clear standards, and a strong testing culture
- Mentor and support junior and mid-level engineers, helping them grow technically and professionally
- Proactively identify and resolve performance bottlenecks across the JS thread, native bridge, and render pipeline, while scaling our mobile CI/CD infrastructure, release processes, and engineering tooling
- Act as the primary mobile platform liaison for internal teams, effectively translating requirements into well-scoped mobile initiatives while upholding rigorous standards for code quality and architectural integrity
Who you are
We're looking for someone who meets the minimum requirements to be considered for the role. If you meet these requirements, you are encouraged to apply. The preferred qualifications are a bonus, not a requirement.
Minimum requirements
- 5+ years of professional mobile development experience, with a strong focus on React Native
- Strong proficiency in TypeScript and modern JavaScript
- Solid understanding of mobile app architecture and design patterns (e.g., Flux, Redux, MobX, or similar)
- Proven expertise in React Native, encompassing component architecture, performance tuning, and a demonstrated ability to ship and maintain high-quality production applications at scale
- Excellent problem-solving skills and ability to communicate complex technical concepts clearly
Preferred qualifications
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- Experience with Expo (managed or bare workflow)
- Experience designing and maintaining mobile CI/CD pipelines (e.g., Fastlane, GitHub Actions, Bitrise)
- Experience building or contributing to mobile SDKs or shared component libraries
- Experience with backend development (REST APIs and GraphQL)
- Contributions to open-source React Native libraries or the broader JS and mobile ecosystem
- Experience mentoring engineers and contributing to a team's engineering culture
- Familiarity with native iOS (Swift, UIKit) or Android (Kotlin, Android SDK) development
- Experience working in a remote-first or distributed engineering environment
Skills
As published by greenhouse · 12 questions
Basics
First Name, Last Name, Email, Phone, Resume/CV, Cover Letter, Location
Short answers (3)
- Who is your current or previous employer?
- What is your current or previous job title?
- What is the most recent school you attended?
Pick from a list (9)
- Please select the country where you currently reside.
- Please select the country or countries you anticipate working in for the role in which you are applying.
- Are you authorized to work in the location(s) you selected in your previous response?
- Will you require Stripe to sponsor you for a work permit now or in the future for the location(s) you selected in in your previous response?
- If this role offers the option to work from a remote location, do you plan to work remotely?
- Have you ever been employed by Stripe or a Stripe affiliate?
- Do you opt-in to receive WhatsApp messages from Stripe Recruiting?
- What is the most recent degree you obtained?
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