Senior Mobile Engineer building and scaling React Native apps for Upstart's borrower servicing experience across iOS and Android. Requires 4+ years experience, React Native expertise, and native platform familiarity to drive key metrics like payment success and user satisfaction.
167k – 231k/yr
Remote4+ YOEMobile Engineering
About the role
How you’ll make an impact
Build and maintain user-facing features in our React Native mobile apps across iOS and Android.
Design and implement mobile components and subsystems that are performant, maintainable, and scalable across platforms.
Collaborate with product and design teams to scope, implement, and launch features that align with user and business needs.
Work with backend engineers to define mobile-specific APIs and improve client-server integration patterns.
Identify and resolve performance or reliability issues in the mobile experience.
Participate in code reviews, architecture discussions, and technical planning to raise engineering quality across the team.
Support a strong mobile engineering culture through mentorship, collaboration, and a focus on continuous improvement.
Minimum Qualifications
Bachelor’s degree in Computer Science, Engineering, or Mathematics, or a related field (or its equivalent) and 4 years of experience.
Experience building in React Native, and familiarity with at least one native platform (e.g., Swift/Objective-C for iOS or Kotlin/Java for Android).
Understand mobile performance, memory management, and platform-specific constraints.
Communicate effectively with cross-functional partners in product, design, and backend engineering.
Take ownership of your work and are comfortable delivering complex features from planning through release.
Balance speed and quality, and advocate for maintainable, scalable engineering solutions.
Contribute to team culture and engineering practices through feedback, mentoring, and collaboration.
Embrace a growth mindset and enjoy learning from others while helping teammates grow.
Preferred Qualifications
Helped launch or scale a React Native app on the Android platform.
Experience with mobile analytics, push notifications, deep linking, or A/B testing frameworks.
Worked in a fast-paced product company where mobile was a primary user touchpoint.
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