Senior Software Engineer - Mobile

Join a mission-driven fintech environment as a founding member of a mobile engineering team, building the next generation of mobile experiences for employees managing their retirement savings and plan administrators overseeing retirement plans. This hands-on role offers the opportunity to shape the mobile architecture, development practices, and release operations from the ground up, without legacy constraints. You will deliver polished iOS and Android experiences while solving complex challenges involving financial data, authentication, security, and performance. AI-powered coding agents will be an integral part of your engineering workflow, with you providing the technical direction and quality oversight. Working closely with Product, Design, and backend engineering teams, you will influence the technical roadmap and help establish standards for a reliable, accessible, and high-performing mobile platform.

• At least 5 years of professional experience building and maintaining production software, including ownership of consumer mobile applications across multiple App Store and Google Play release cycles.

• Deep expertise in either native mobile development (Swift and SwiftUI, or Kotlin and Jetpack Compose) or cross-platform frameworks such as React Native, Flutter, or Kotlin Multiplatform.

• Strong understanding of mobile architecture, performance optimization, testing strategies, data structures, concurrency, and asynchronous programming.

• Proven ability to own features end to end, from technical design and implementation through release, monitoring, and iteration.

• Hands-on experience regularly using agentic coding tools such as Codex, Claude Code, or Cursor in production engineering work, with sound judgment around code quality, security, and testing.

• Familiarity with automated mobile testing tools such as XCUITest, Espresso, or Appium; device farms; client-side telemetry platforms such as Sentry, Firebase, or Datadog; and API contract design.

• Ability to work with backend technologies such as Node.js, TypeScript, Kotlin, and AWS.

• Commitment to accessibility, maintainable code, and well-tested software.

• Strong communication and collaboration skills, product awareness, attention to detail, and a proactive approach to solving customer problems.

• Experience mentoring engineers through code reviews and contributing to a strong engineering culture.

• A bachelor's or master's degree in Computer Science, Engineering, or a related field is typically expected.

• Experience building a mobile product from 0 to 1 and working in fintech, financial services, or other security-sensitive or regulated environments is a plus.