Senior Software Engineer - Mobile

About this role

Build and launch Human Interest’s mobile experience for retirement plan participants and administrators. As a founding mobile engineer, you’ll shape the app architecture, development workflows, and release operations while using AI coding agents to accelerate high-quality, secure delivery.

About the company

Human Interest is a technology-driven company that provides affordable and easy-to-manage 401(k) retirement plans for small and medium-sized businesses, helping them offer valuable retirement benefits to their employees.

Stack

What you'll do

• Build polished iOS and Android experiences for employees and plan administrators.
• Architect a modular, testable mobile codebase and help set native-versus-cross-platform direction.
• Use and guide AI coding agents throughout the development lifecycle.
• Build secure mobile features for balances, authentication, biometrics, and sensitive financial data.
• Own CI/CD, store rollouts, feature flags, automated UI testing, and app quality metrics.
• Partner with Design and backend engineers on accessibility, API contracts, and backend-driven UI.

What we're looking for

• 5+ years building and maintaining production software, including shipping and owning consumer mobile apps across multiple release cycles.
• Deep expertise in native mobile development or cross-platform frameworks, including architecture, performance, and testing.
• Experience owning features end to end, from technical design through release and iteration.
• Strong computer science fundamentals, including data structures, concurrency, and asynchronous programming.
• Hands-on, regular use of agentic coding tools on production work, with sound judgment about code quality and security.
• Strong communication, product sense, and collaborative ownership; commitment to accessible, maintainable code.

Nice to have

• Experience taking a mobile app from 0 to 1.
• Experience in fintech, security-sensitive applications, or regulated domains.
• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field.

Benefits

• 401(k) with dollar-for-dollar employer match up to 4%, immediately vested, and no plan fees.
• Health, dental, and vision insurance.
• Paid time off and parental leave.
• Monthly work-from-home stipend and quarterly lifestyle stipend.
• Financial wellness, mental health, fertility, and student-loan support benefits.
• Team-building events and team offsites.