Software Engineer, Mobile

Role Description

As the Senior Mobile Engineer at Upstart, you will help design and build 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. Our mobile codebase is React Native-first, and we’re in the early stages of expanding across iOS and Android. The work includes:

• Building user-facing features in our React Native mobile apps across iOS (and Android, as we expand).
• Designing and implementing mobile components and subsystems that are performant, maintainable, and scalable across platforms.
• Collaborating with product and design teams to scope, implement, and launch features that align with user and business needs.
• Contributing to platform improvements, including tooling, testing strategies, CI/CD, and performance monitoring.
• Working with backend engineers to define mobile-specific APIs and improve client-server integration patterns.
• Identifying and resolving performance or reliability issues in the mobile experience.
• Participating in code reviews, architecture discussions, and technical planning to raise engineering quality across the team.
• Supporting a strong mobile engineering culture through mentorship, collaboration, and a focus on continuous improvement.

Qualifications

• Bachelor’s degree in Computer Science, Engineering, or Mathematics, or a related field (or its equivalent) + 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).
• Understanding of mobile performance, memory management, and platform-specific constraints.
• Effective communication with cross-functional partners in product, design, and backend engineering.
• Ownership of work and comfort delivering complex features from planning through release.
• Ability to balance speed and quality, advocating for maintainable, scalable engineering solutions.
• Contribution to team culture and engineering practices through feedback, mentoring, and collaboration.
• Embracing a growth mindset and enjoyment in learning from others while helping teammates grow.

Requirements

• Have helped launch or scale a React Native app on the Android platform.
• Comfortable working with TypeScript or custom native modules.
• 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.
• Contributed to internal tools, processes, or systems that improved mobile developer velocity or code quality.

Benefits

• Competitive compensation, including base pay, bonus opportunities, and annual equity grants that vest quarterly.
• Retirement benefits, including a 401(k) or Group Retirement Savings Plan with a company match of $2 for every $1 contributed, up to $15,000 annually (USD in the US, CAD in Canada).
• Employee Stock Purchase Plan (ESPP) with discounted stock purchase options for eligible employees (US only).
• Comprehensive health coverage, including medical, dental, vision, and wellness resources for US and supplemental health coverage for Canada.
• Health Savings Account contributions from Upstart for eligible plans (US only).
• Income protection benefits, including life insurance and disability coverage.
• Paid time off, sick leave, and company holidays, in line with local requirements.
• Paid family and parental leave to support caregiving and major life moments (duration varies by country).
• Family-centered benefits to support fertility, parenthood, and caregiving needs.
• Employee Assistance Program (EAP) offering mental health support and life-centered resources.
• Financial wellness resources, including access to financial planning tools and a financial concierge service (US Only).
• Annual wellness allowance to support your physical and emotional well-being and personal development.
• Annual productivity allowance to invest in relevant tools and resources.
• Connection and community through team events, all-company updates, and employee resource groups (ERGs).
• Onsite perks, including catered lunches and fully stocked micro-kitchens when working from one of our offices.