Senior Mobile Engineer

  • Fuse Energy, LLC
  • 12/07/2026
Full time Information Technology Telecommunications

Job Description

We're hiring Mobile Engineers to join a small, high-ownership team in our London office. This isn't a role where you'll be handed fully-specced tickets, you'll own features end-to-end, from customer-facing product to internal tools, including shipping consumer-facing AI features into production on mobile. You'll work in Swift and Kotlin across iOS and Android alongside a tight team of mobile and web engineers, on everything from expansion into new markets to the polish that makes an app feel effortless. Our infrastructure and backend are already excellent; we're looking for mobile engineers who bring the same bar of craft and ownership to match.

Responsibilities
  • Design, build, and maintain responsive, reusable, and reliable mobile applications for iOS and Android platforms
  • Own features end-to-end, from shaping the product idea through to shipping and iterating in production
  • Work closely with designers to implement high-quality UI/UX and ensure design consistency, with a real focus on craft and polish
  • Ship consumer-facing AI features into production on mobile, from on-device ML to in-app AI assistants
  • Contribute to architectural decisions to ensure scalability, maintainability, and flexibility of the mobile codebase
  • Test, debug, and resolve issues to maintain app stability and reliability
  • Troubleshoot production issues and provide timely resolutions to ensure smooth user experiences
Qualifications
  • 5+ years of professional experience building mobile applications for iOS and Android
  • Proficiency in Swift or Kotlin, with deep expertise in at least one platform and the range to work across both
  • Strong grasp of mobile UI/UX principles and best practices for creating intuitive, responsive experiences, with a real eye for craft and detail
  • A track record of owning features end-to-end and contributing product ideas, not just executing specs
  • Hands on experience integrating RESTful APIs with mobile applications
  • Familiarity with push notifications, messaging services, and related mobile frameworks
  • Understanding of mobile security fundamentals and ability to implement secure data handling
Benefits
  • Competitive salary and an equity sign on bonus
  • Biannual bonus scheme
  • Fully expensed tech to match your needs
  • Paid annual leave
  • Breakfast and dinner allowance for office based employees