Senior Software Engineer, Mobile

Upstart

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.

Posted 7/14/2026Verified active Jul 25, 2026, 12:31 AMfull-timeRemote • United States • 🇨🇦 Canada, 🇺🇸 United StatesSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrated expertise in building and maintaining user-facing features in React Native mobile applications for both iOS and Android platforms, with a strong focus on performance, scalability, and maintainability. Proven ability to collaborate effectively with cross-functional teams, mentor peers, and contribute to a positive engineering culture while delivering complex features from planning to release.

Highest-signal resume keywords

React NativeMobile PerformanceCross-Functional CollaborationMentorshipMobile Analytics

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

React NativeSwiftObjective-CKotlinJavaMobile PerformanceMemory ManagementA/B Testing FrameworksPush NotificationsDeep Linking

Soft Skills

Effective CommunicationOwnershipCollaborationFeedbackGrowth Mindset

Tools & Technologies

Mobile AnalyticsClient-Server Integration PatternsCode Review ToolsTechnical Planning ToolsPerformance Monitoring Tools

Certifications & Qualifications

Bachelor’s Degree in Computer ScienceEngineeringMathematics

Industry Keywords

Mobile EngineeringUser ExperienceCross-Platform DevelopmentScalable Engineering SolutionsContinuous Improvement

Tech Stack

Tools & technologies

AndroidAwsCloudDistributed systemsDockerGrpcIosJavaKafkaKotlinKubernetesNext.jsNode.jsObjective-cPythonReactReact nativeRubyRuby on railsSparkSwiftTypescript

About the role

Key responsibilities & 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.

Requirements

What you’ll need

Bachelor’s degree in Computer Science, Engineering, or Mathematics, or a related field (or its equivalent) and 4 years of experience.
Have 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.
Have helped launch or scale a React Native app on the Android platform.
Have experience with mobile analytics, push notifications, deep linking, or A/B testing frameworks.

Benefits

Comp & perks

Competitive compensation, including base pay, bonus opportunities, and annual equity grants that vest quarterly 
Retirement benefits to help you plan for the future, 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 designed to support you and your family, 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 for added financial security
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