Senior Mobile Engineer - End-to-End & AI Features

Fuse Energy, LLC; Greater London; On-site; GBP 85,000 - 120,000; Full time

Benefits offered by this job

Equity sign-on bonus

Biannual bonus

Fully expensed tech

Paid annual leave

Office breakfasts and dinners

Job summary

Fuse Energy, LLC in London is seeking experienced Mobile Engineers to join a small, high-ownership team. You will own features end-to-end, from customer-facing product to internal tools, shipping consumer-facing AI features on mobile using Swift or Kotlin across iOS and Android.

You'll work with a tight team to design and deliver polished, scalable mobile apps, collaborating with designers and backend engineers, and taking responsibility for code quality, testing, and production readiness in a

Qualifications

• 5+ years building mobile apps on iOS and Android.
• Proficient in Swift or Kotlin with cross‑platform capability.
• Experience shipping consumer AI features on mobile.

Responsibilities

• Design, build, and maintain mobile apps for iOS and Android.
• Own features end-to-end from idea to production.
• Collaborate with designers to ensure high-quality UI/UX.
• Ship consumer-facing AI features on mobile.
• Contribute to scalable, maintainable mobile codebases.
• Test, debug, and resolve issues to ensure stability.
• Troubleshoot production issues for smooth experience.

Skills

5+ years experience

Swift or Kotlin

UI/UX craft

End-to-end ownership

RESTful APIs

Push notifications

Security fundamentals

Job description

Fuse Energy, LLC in London is seeking experienced Mobile Engineers to join a small, high-ownership team. You will own features end-to-end, from customer-facing product to internal tools, shipping consumer-facing AI features on mobile using Swift or Kotlin across iOS and Android.

You'll work with a tight team to design and deliver polished, scalable mobile apps, collaborating with designers and backend engineers, and taking responsibility for code quality, testing, and production readiness in a