Senior Software Engineer - Mobile

Responsibilities

• Build and ship polished iOS and Android experiences for employees and retirement plan administrators.
• Architect a modular mobile codebase from scratch with strong concurrency, dependency management, testability, performance, and maintainability.
• Use AI coding agents across the software development lifecycle while serving as the technical architect and decision-maker.
• Implement secure authentication, biometrics, real-time balances, and protection for sensitive financial data.
• Own CI/CD, feature flags, phased App Store and Play Store releases, automated UI testing, crash-free rates, and app ratings.
• Partner with Design on animations, haptics, data visualization, accessibility, and overall product quality.
• Collaborate with backend engineers on API contracts, backend-driven UI, and the native-versus-cross-platform strategy.
• Mentor through code reviews and help establish engineering patterns and quality standards for the founding mobile team.

Requirements

• 5+ years of experience building and maintaining production software, including shipping and owning consumer mobile apps through multiple App Store and Play Store release cycles.
• Deep expertise in native mobile development with Swift and SwiftUI or Kotlin and Jetpack Compose, or cross-platform development with React Native, Flutter, or Kotlin Multiplatform.
• Experience owning features end to end from technical design through release and iteration in a cross-functional environment.
• Deep understanding of mobile architecture, performance tuning, concurrency, asynchronous programming, device farms, automated UI testing, client-side telemetry, and API contract design.
• Hands-on, regular production use of agentic coding tools such as Codex, Claude Code, and Cursor.
• Strong computer science fundamentals and the ability to keep AI-generated code correct, secure, and well-tested.
• Experience taking a mobile app from 0 to 1 is a plus.
• Experience with fintech, security-sensitive applications, or regulated domains is a plus.
• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field is typically required.

Benefits

• Base salary of $190,000-$230,000 per year, with potential additional bonuses, commissions, and equity.
• 401(k) plan with dollar-for-dollar employer matching up to 4% of compensation, immediate vesting, and no plan fees.
• Health, dental, and vision insurance.
• Competitive time off and parental leave.
• Financial wellness, mental health, fertility and family-forming, and student-loan support programs.
• Monthly work-from-home stipend and quarterly lifestyle stipend.
• Virtual social events and team offsites.
• Accessible application process and equal opportunity employment.