Embedded Software Engineer

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 looking for an Embedded Software Engineer to help design, build and scale the connected hardware behind our fleet of distributed energy devices. This is a hands-on role spanning embedded systems, networking, device security and fleet connectivity, from prototype through to deployment. You'll help build resilient connectivity, secure provisioning and robust telemetry, working closely with firmware, hardware and backend teams to deliver production-ready systems.

Responsibilities

• Develop and maintain connectivity across Ethernet, Wi-Fi, Thread, Zigbee and BLE; build secure, reliable device messaging using MQTT, CoAP, HTTP or WebSockets; support device time synchronisation using NTP or PTP.
• Develop low-level firmware and drivers for microcontrollers and embedded peripherals.
• Integrate devices with cloud IoT platforms and backend services; improve telemetry, health monitoring and observability; support reliable field operation and debug fleet issues.
• Work closely with our test team to build the firmware and software that runs our automated test suite.
• Work closely with hardware, power electronics, mechanical and software teams; contribute to design reviews, technical documentation and interface specifications.