Senior Mobile Engineer (React Native)

TL;DR

Senior Mobile Engineer (React Native): Building world-class mobile applications for Stripe merchants with an accent on architecture, performance, and high-quality user experiences. Focus on shaping React Native architecture, integrating AI tools, and optimizing the mobile render pipeline.

Location: Barcelona

Salary: €80,000 - €120,000

Company

Financial infrastructure platform for businesses that enables companies to accept payments and accelerate new business opportunities.

What you will do

• Lead the design and development of critical product features for millions of global users.
• Integrate AI and cutting-edge development tools to drive efficiency and elevate code standards.
• Own architectural decisions for the mobile layer, including navigation, state management, and native module integration.
• Drive code quality through thorough reviews and a strong testing culture.
• Mentor and support junior and mid-level engineers to help them grow professionally.
• Optimize performance across the JS thread, native bridge, and render pipeline while scaling CI/CD infrastructure.

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).
• Proven expertise in shipping and maintaining high-quality production applications at scale.
• Must be based in Barcelona.

Nice to have

• Experience with Expo (managed or bare workflow).
• Experience designing and maintaining mobile CI/CD pipelines (e.g., Fastlane, GitHub Actions, Bitrise).
• Familiarity with native iOS (Swift, UIKit) or Android (Kotlin, Android SDK) development.
• Contributions to open-source React Native libraries or the broader JS ecosystem.
• Experience building mobile SDKs or shared component libraries.

Culture & Benefits

• Opportunity to work on a platform missioned to increase the GDP of the internet.
• High-impact role where architectural decisions affect millions of merchants worldwide.
• Engineering culture focused on AI-assisted development and rigorous quality standards.
• Collaborative environment working closely with product and design partners.