Embedded Software Engineer

DescriptionFuse 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. ResponsibilitiesConnectivity and networking: develop and maintain connectivity across Ethernet, Wi-Fi, Thread, Zigbee and BLE; build secure, reliable device messaging using MQTT, CoAP, or WebSockets; support device time synchronisation using NTP or PTPDevice security and OTA management: contribute to secure boot flows, key and certificate provisioning and hardware-backed device identity using TPMs or secure elements; build and maintain signed firmware update pipelines including OTA update and rollback; support security best practices across the device lifecycleEdge and cloud integration: integrate devices with cloud IoT platforms and backend services; improve telemetry, health monitoring and observability; support reliable field operation and debug fleet issuesCompliance and testing: support testing and validation for safety, EMC, radio and related requirements; prepare test plans and certification artefacts; work with manufacturing through engineering and production validation cyclesCross-functional collaboration: work closely with firmware, hardware, power electronics, mechanical and software teams; contribute to design reviews, technical documentation and interface specificationsRequirementsBachelor's degree in Electrical Engineering, Computer Engineering, Computer Science or equivalent practical experience2+ years of experience building connected embedded products, or strong relevant industry/project experienceGood proficiency in C/C++ for embedded systems, with experience of RTOS environments such as Zephyr or FreeRTOSExperience with Python for testing, tooling or automationSolid understanding of device connectivity and networking fundamentals, including IP networking and common transport/application protocolsExperience implementing or supporting secure device communications using TLS, certificates or device provisioning workflowsFamiliarity with firmware update systems, bootloaders or CI/CD workflows for embedded softwarePractical debugging experience using lab and software tools such as logic analysers, protocol analysers, network sniffers or observability platformsStrong problem-solving skills and the ability to work across hardware and software boundariesBonus: low-power wireless (Thread, Zigbee, BLE); cloud IoT services on AWS, Azure or GCP; secure boot, TPMs, secure elements or hardware attestation; EMC/RF testing, antenna bring-up or factory test; awareness of standards such as IEC 62443, ETSI EN 303 645, ISO 27001 or GDPR; industrial, energy or distributed device deploymentsBenefitsCompetitive salary and eligibility for equityBiannual bonus schemeFully expensed tech to match your needsPrivate health insuranceBreakfast and dinner allowance for office-based employeesAs we hire globally, benefits vary by location. Job SummaryID: 6616C5D130Department: Type: full time