Senior Mobile Engineer – React Native (Remote)

Upstart; United States; Remote; USD 142,000 - 197,000; Full time

Benefits offered by this job

Competitive compensation

Equity grants

401(k) match

Job summary

Upstart is seeking a Senior Mobile Engineer to design and build high-quality React Native mobile apps for iOS and Android. You will work with product, design, and backend teams to deliver features that delight users and scale across platforms.

We value pragmatism, quality, and impact as we expand the mobile platform while maintaining a strong engineering culture and mentorship within the BX team.

Qualifications

• Bachelor's degree in CS/Engineering/Math or equivalent, plus 4 years of experience.
• Experience building in React Native; familiarity with Swift/Obj-C or Kotlin/Java.
• Understanding mobile performance, memory management, and platform constraints.
• Strong communication with product, design, and backend teams.
• Own features from planning through release.
• Balance speed with quality for maintainable, scalable solutions.
• Mentor teammates and contribute to engineering culture.
• Growth mindset and willingness to learn and help others.

Responsibilities

• Build and maintain user-facing features in React Native apps across iOS (and Android as we expand).
• Design and implement mobile components and subsystems that are performant and scalable across platforms.
• Collaborate with product and design to scope, implement, and launch features.
• Contribute to tooling, testing strategies, CI/CD, and performance monitoring.
• Define mobile-specific APIs with backend engineers; improve client-server integration.
• Identify and resolve performance or reliability issues in the mobile experience.
• Participate in code reviews, architecture discussions, and technical planning.
• Support a strong mobile engineering culture through mentorship and collaboration.

Skills

React Native

Native iOS/Android

Mobile performance

Cross-functional comms

Ownership & delivery

Quality focus

Mentoring & collaboration

Growth mindset

TypeScript

Education

Bachelor's degree in Computer Science, Engineering, or Mathematics

Tools

TypeScript

Job description

Upstart is seeking a Senior Mobile Engineer to design and build high-quality React Native mobile apps for iOS and Android. You will work with product, design, and backend teams to deliver features that delight users and scale across platforms.

We value pragmatism, quality, and impact as we expand the mobile platform while maintaining a strong engineering culture and mentorship within the BX team.