Senior Firmware Engineer

Fuse Energy

Job Overview

Location

London, England, United Kingdom

Employment Type

Full-time

Work Arrangement

On-site

Sector

Engineering & Manufacturing

Experience Level

Senior (5-8 years)

Application Deadline

June 8, 2026

About the Company

Fuse Energy is a dynamic and forward-thinking renewable energy startup dedicated to accelerating the transition to sustainable power. Their mission is to deliver a terawatt of renewable energy at an unprecedented pace. By integrating first-principles thinking with cutting-edge technology, Fuse Energy is building a fundamentally better energy system. They have secured significant funding, raising $170 million from prominent investors, including Multicoin, Balderton, Lakestar, Accel, and others. Strategic angels also back the company, including the co-founder of Solana and key figures from Meta, Revolut, Spotify, and Uber. The company is establishing a comprehensive energy ecosystem, encompassing the development of solar, wind, and hydrogen projects, alongside real-time power trading and distributed energy installations. Their direct-to-consumer sales model eliminates intermediaries, reducing costs and passing savings to customers. Furthermore, Fuse Energy is developing the 'Energy Network,' a decentralized platform featuring smart devices. This network incentivizes users with 'Energy Dollars' for electrifying their homes, shifting energy consumption to off-peak hours, and contributing to grid balancing. This enhanced grid stability is vital for supporting the growth of energy-intensive sectors like AI data centers.

Job Description

Fuse Energy is at the forefront of the renewable energy revolution, aiming to deliver a terawatt of clean energy rapidly. We are building a smarter, more efficient energy system by combining fundamental scientific principles with advanced technology.

Our mission involves developing solar, wind, and hydrogen projects, alongside sophisticated power trading and distributed energy installations. We are also creating the 'Energy Network,' a decentralized platform designed to reward users for smart energy practices and contribute to grid stability, which is essential for supporting emerging energy demands.

As a Senior Firmware Engineer, you will develop low-level firmware and drivers for microcontrollers and embedded peripherals. You will design and implement real-time control software and embedded algorithms, writing, testing, and debugging embedded C/C++ firmware. Collaboration with hardware, systems, and controls teams is key, as is participating in code reviews and contributing to firmware best practices. You will also assist in board bring-up and debugging using specialized tools.

To apply for this role, click the Apply button on this page and follow the instructions.

Required Skills

CC++Embedded SystemsFirmware EngineeringMicrocontrollersSPII2CUARTDMATimersADCsFlashCANReal-time SystemsEmbedded Development ToolchainsGNUIARGitDockerCI PipelinesOscilloscopesLogic AnalyzersJTAG/SWD

Key Responsibilities

Develop low-level firmware and drivers for microcontrollers and embedded peripherals (SPI, I2C, UART, DMA, ADC, etc.)
Design and implement real-time control software and embedded algorithms for energy devices
Write, test, and debug embedded C/C++ firmware running on bare-metal or RTOS-based systems
Collaborate with hardware, systems and controls teams to define firmware requirements and test plans
Participate in code reviews, write documentation and contribute to the continuous improvement of firmware practices
Assist in board bring-up, profiling and debugging using tools like oscilloscopes, JTAG/SWD, and logic analysers
Implement and maintain bootloaders, linker scripts and firmware deployment pipelines

Qualifications

5+ years of experience in embedded systems or firmware engineering
Strong proficiency in C, with experience writing firmware for microcontrollers
Hands-on experience with common MCU peripherals: SPI, I2C, UART, DMA, timers, ADCs, Flash, CAN, etc.
Experience working with real-time systems and embedded development toolchains (e.g., GNU, IAR)
Familiarity with version control and tooling (e.g., Git, Docker, CI pipelines)
Ability to work with hardware debugging tools (oscilloscopes, logic analysers, JTAG/SWD)

Benefits & Perks

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

How to Apply

To apply for this role, click the Apply button on this page and follow the instructions.

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The renewable energy sector is experiencing rapid expansion, driven by global demand for sustainable power solutions. As a Senior Firmware Engineer at Fuse Energy, you will play a pivotal role in shaping the future of energy technology. Your expertise in embedded C/C++, real-time operating systems (RTOS), and microcontroller peripherals like SPI and I2C will be crucial. This position offers the opportunity to significantly impact business ROI by developing innovative firmware for energy devices, contributing to grid stability, and supporting the scaling of energy-intensive industries.