Senior Mobile Engineer - End-to-End, AI-Powered Mobile

Fuse Energy; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Equity sign-on bonus

Biannual bonus scheme

Fully expensed tech

Paid annual leave

Breakfast and dinner allowance

Job summary

Fuse Energy is hiring senior Mobile Engineers to join a small, high-ownership team in our London office. You’ll own features end-to-end, from customer-facing product to internal tools, shipping consumer-facing AI features into production on mobile.

You’ll work in Swift and Kotlin across iOS and Android with a tight team of mobile and web engineers, contributing to expansion into new markets and polish that makes an app feel effortless.

Qualifications

• 5+ years of professional experience building mobile applications for iOS and Android.
• Proficiency in Swift or Kotlin, with ability to work across both platforms.
• Experience shipping consumer-facing AI features into production on mobile.
• Hands-on integration of RESTful APIs with mobile apps.
• Strong focus on craft, UI/UX, and design consistency.

Responsibilities

• Design, build, and maintain responsive, reusable mobile apps for iOS and Android.
• Own features end-to-end from concept through production shipping and iteration.
• Collaborate with designers to deliver high-quality UI/UX and polished interfaces.
• Ship AI features on mobile, including on-device ML and in-app assistants.
• Contribute to architecture for scalable, maintainable mobile codebases.
• Test, debug, and resolve issues to ensure app stability and reliability.
• Troubleshoot production issues to ensure smooth user experiences.

Skills

Mobile development

End-to-end ownership

UI/UX focus

Product ideation

Craftsmanship

Tools

Swift

Kotlin

RESTful APIs

Push notifications

Mobile security

Job description

Fuse Energy is hiring senior Mobile Engineers to join a small, high-ownership team in our London office. You’ll own features end-to-end, from customer-facing product to internal tools, shipping consumer-facing AI features into production on mobile.

You’ll work in Swift and Kotlin across iOS and Android with a tight team of mobile and web engineers, contributing to expansion into new markets and polish that makes an app feel effortless.