Fuse Energy is an energy startup on a mission to make energy abundant and affordable, fast. We combine first-principles thinking with cutting-edge technology to build a radically better energy system.
We've raised over $200M from top-tier investors including Balderton, Lakestar, Accel, Creandum, Lowercarbon, Ribbit, 20VC, Hummingbird and Collaborative Fund, alongside strategic angels including Nico Rosberg and GPs behind Meta, Revolut, Spotify and Uber.
We're building a fully integrated energy company: developing our own solar, batteries and other generation projects, building our own hardware, improving and developing grid infrastructure, trading power in real time, using AI across the business, and installing distributed energy in homes. By selling directly to consumers we cut out the middleman, lower costs and pass the savings on to our customers.
We're hiring Mobile Engineers to join a small, high-ownership team. You won't 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. Our infrastructure and backend are already excellent; we're looking for mobile engineers who bring the same bar of craft and ownership.
Responsibilities- Build dynamic UI. AI composes a different experience for each customer from the components you build, and there's no established pattern to follow
- Ship vision models that run on the device. Balcony scan to panel count, meter photo to instant quote, and fault detection that catches dangerous meter faults a human would miss
- Make AI native to the product rather than a chat window stapled to the side.
- Own features end to end, from architecture through to shipped, polished UI
- Work closely with our backend and AI engineers and designers.
- Set the bar for mobile craft. We care how things look and feel, not just whether they work
- Help define product direction, not just execute it. We want people who dig into the "why", not just the "how"
Requirements
- 5+ years building mobile applications, deep in Swift or Kotlin with the range to work across both. You've stayed hands-on throughout
- You don't stop at the client. You've worked beneath the framework and reached into the backend.
- Demonstrated ownership, able to speak to decisions you drove, not just tasks you completed
- Strong communication skills and ability to collaborate effectively across product, design, backend and web
- Genuinely AI-native. You get real leverage from agents without handing over your judgement
- We have an office in London, but we hire anywhere in the world
Benefits
- Competitive salary and eligibility for equity
- Biannual bonus scheme
- Fully expensed tech to match your needs
- Private health insurance
- Breakfast and dinner allowance for office-based employees
As we hire globally, benefits vary by location.
Skills Required
- 5+ years of professional experience building mobile applications for iOS and Android
- Proficiency in Swift or Kotlin
- Deep expertise in at least one platform with ability to work across both iOS and Android
- Strong grasp of mobile UI/UX principles and best practices
- Track record of owning features end-to-end and contributing product ideas
- 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 secure data handling
What We Do
We are building a full stack renewable energy company to accelerate global renewable energy transition. We are based in London, New York. We've raised $90m from top tier investors like Balderton, Lakestar, Accel, Creandum, Lowercarbon, Ribbit, MultiCoin. Energy is broken – We are here to fix it.
