ABOUT UPSTART

Upstart is the leading AI lending marketplace partnering with banks and credit unions to expand access to affordable credit. By leveraging Upstart’s AI marketplace, Upstart-powered banks and credit unions can have higher approval rates and lower loss rates across races, ages, and genders, while simultaneously delivering the exceptional digital-first lending experience their customers demand. More than 80% of borrowers are approved instantly, with zero documentation to upload.
Upstart is a digital-first company, which means that most Upstarters live and work anywhere in the United States. However, we also have offices in San Mateo, California; Columbus, Ohio; and Austin, Texas.
Most Upstarters join us because they connect with our mission of enabling access to effortless credit based on true risk. If you are energized by the impact you can make at Upstart, we’d love to hear from you!

THE ROLE

As a Senior Mobile Software Engineer at Upstart, you’ll help design and build scalable, high-quality mobile applications using React Native. You’ll collaborate closely with product managers, designers, and backend engineers to deliver features that delight users and align with company goals.
This is a hands-on, execution-focused role for an experienced engineer who wants to ship features, own technical decisions, and improve our mobile platform. You’ll contribute to engineering quality through thoughtful system design, code review, and a focus on long-term maintainability.

WHAT YOU’LL DO

• Build and maintain user-facing features in our React Native mobile apps across iOS (and Android, as we expand).
• 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.
• Contribute to platform improvements, including tooling, testing strategies, CI/CD, and performance monitoring.
• 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.