Senior Software Engineer - Mobile

humaninterest; United States; Hybrid; USD 140,000 - 210,000; Full time

Benefits offered by this job

Health and wellness benefits

Work-from-home stipend

Quarterly lifestyle stipend

Job summary

HumanInterest is expanding its mobile engineering team to build a retirement savings product for employees and plan administrators. You will help establish a scalable mobile architecture and shape release practices while delivering reliable, high-quality user experiences across iOS and Android.

You will own features end-to-end, work with AI coding agents, and drive performance, security, and accessibility as the product evolves.

Qualifications

• 5+ years building and maintaining production software, owning consumer mobile apps across multiple store releases.
• Strong experience with native development (SwiftUI or Kotlin/Jetpack) or cross‑platform frameworks (React Native, Flutter, Kotlin Multiplatform).
• Ability to own features from design through launch in a cross-functional team.
• Strong mobile engineering fundamentals: architecture, performance, and testing.
• Hands-on experience with agentic coding tools and reviewing generated code for quality, security, and correctness.

Responsibilities

• Design and ship polished mobile features for iOS and Android.
• Establish a modular, testable codebase and determine native vs cross-platform approach.
• Use AI coding agents throughout development and review their output for correctness and security.
• Build secure mobile flows for authentication, balances, and sensitive financial data.
• Set up CI/CD, staged rollouts, feature flags, and automated UI tests.
• Collaborate with Product, Design, and backend engineers on app experiences and performance.

Skills

Mobile development

Swift/SwiftUI

Kotlin/Jetpack

Cross-platform frameworks

AI-assisted coding review

Tools

CI/CD tools

AI coding agents

Job description

Role overview

Help establish mobile engineering for a retirement savings product, building experiences for employees and, over time, plan administrators. As an early engineer on a new team, you’ll shape the app architecture and delivery practices from the ground up, while owning product outcomes such as reliability, release quality, and user experience. The work combines hands-on mobile development with technical leadership and regular use of AI coding agents.

Responsibilities

• Design and ship polished mobile features for iOS and Android, including tools that help users understand and manage retirement savings.
• Establish a modular, testable codebase and help determine the team’s native and cross-platform approach.
• Use coding agents throughout development, reviewing their output for correctness, security, and quality.
• Build secure mobile flows for authentication, biometrics, balances, and sensitive financial data.
• Set up release practices such as CI/CD, staged store rollouts, feature flags, and automated UI testing.
• Work with Product, Design, and backend engineers on app experiences, API contracts, accessibility, and performance.

Requirements

• 5+ years building and maintaining production software, including ownership of consumer mobile apps across multiple store releases.
• Strong experience with either native development (Swift and SwiftUI, or Kotlin and Jetpack Compose) or cross-platform frameworks such as React Native, Flutter, or Kotlin Multiplatform.
• Ability to own features from technical design through launch and iteration in a cross-functional team.
• Strong mobile engineering fundamentals, including architecture, performance, and testing.
• Regular hands-on experience with agentic coding tools and sound judgment about reviewing and validating generated code.

Nice to have

• Experience taking a mobile app from initial build to launch.
• Background in fintech, security-sensitive products, or regulated industries.

Benefits and work setup

• Benefits listed include health and financial wellness resources, mental health and family-building support, student loan resources, and monthly work-from-home and quarterly lifestyle stipends.