Senior Mobile Engineer – Greenfield Fintech App

Human Interest; United States; Remote; USD 190,000 - 230,000; Full time

Benefits offered by this job

401(k) match

Health insurance

Monthly remote stipend

Job summary

Human Interest is building the future of mobile retirement experiences. As a Senior Software Engineer on the Mobile team, you will design, build, and ship features used by millions of employees and plan admins to manage their retirement savings across iOS and Android, leveraging AI to accelerate coding and define agentic workflows.

You will own the architectural direction, collaborate with Product and Design, and shape cross‑platform patterns with a blank slate approach, ensuring fast, secure,

Qualifications

• 5+ years of experience building and maintaining production software.
• Deep expertise in native mobile development or cross‑platform frameworks with strong opinions on architecture, performance, and testing.
• Experience owning features end to end in a collaborative environment.
• Experience taking a mobile app from 0 to 1 is a plus.
• Experience with fintech, security‑sensitive applications, or regulated domains is a plus.

Responsibilities

• Build a polished iOS/Android experience, native or cross‑platform.
• Architect a modern modular codebase with strong testability and no legacy constraints.
• Direct AI coding agents across the development lifecycle.
• Solve fintech‑level mobile challenges: real‑time balances, secure auth, data protection.
• Own shipping: CI/CD, phased app store rollouts, feature flags, automated UI tests.

Skills

Native mobile development

Cross-platform frameworks

End-to-end ownership

Mobile architecture

Testing & QA

Education

Bachelor’s or Master’s degree in CS/Engineering

Tools

Codex

Claude Code

Cursor

XCUITest

Espresso

Appium

Job description

Human Interest is building the future of mobile retirement experiences. As a Senior Software Engineer on the Mobile team, you will design, build, and ship features used by millions of employees and plan admins to manage their retirement savings across iOS and Android, leveraging AI to accelerate coding and define agentic workflows.

You will own the architectural direction, collaborate with Product and Design, and shape cross‑platform patterns with a blank slate approach, ensuring fast, secure,