Senior Embedded Software Engineer, IoT & Secure Devices

Fuse Energy Supply; Greater London; On-site; GBP 63,000 - 103,000; Full time

Benefits offered by this job

Equity sign-on bonus

Biannual bonus scheme

Fully expensed tech to match your need

Paid annual leave

Breakfast and dinner allowance

Job summary

Fuse Energy is seeking an Embedded Software Engineer to design, build, and scale connected hardware powering our Energy Network. You will work hands-on across embedded systems, networking, device security, fleet connectivity, firmware, hardware, and backend teams.

The role involves developing secure device messaging, implementing OTA update pipelines, and ensuring robust telemetry and observability across deployed devices, with collaboration from cross-functional teams.

Qualifications

• Bachelor's degree in Electrical/Computer Engineering or Computer Science or equivalent practical experience.
• 5+ years building connected embedded products or equivalent experience.
• Strong C/C++ for embedded systems with RTOS experience (Zephyr/FreeRTOS).
• Experience with Python for testing, tooling, or automation.
• Solid understanding of IP networking and common protocols.

Responsibilities

• Develop and maintain connectivity across Ethernet, Wi-Fi, Thread, Zigbee, and BLE.
• Build and optimise secure, reliable device messaging using MQTT, CoAP, HTTP, or WebSockets.
• Support reliable device time synchronisation using NTP or PTP.
• Contribute to secure boot flows, key and certificate provisioning, and hardware-backed device identity using TPMs or secure elements.
• Help build and maintain signed firmware update pipelines, including OTA update and rollback mechanisms.
• Support security best practices across the device lifecycle, including vulnerability management and secure provisioning.
• Integrate devices with cloud IoT platforms and backend services.
• Define and improve telemetry, health monitoring, and observability for deployed devices.
• Support reliable operation of connected devices in the field, including debugging fleet issues and improving resilience.
• Support testing and validation for safety, EMC, radio, and related product requirements.
• Help prepare test plans, certification artefacts, and validation documentation.
• Work with manufacturing and cross-functional teams through engineering and production validation cycles.
• Work closely with firmware, hardware, power electronics, mechanical, and software teams to deliver production-ready devices.
• Contribute to design reviews, technical documentation, and interface specifications.
• Share knowledge and contribute to engineering best practices across connectivity, embedded systems, and device security.

Skills

C/C++

Embedded systems

RTOS

Python

Networking basics

TLS/PKI

Firmware/CI/CD

Education

Bachelor's degree in Electrical/Computer Engineering or Computer Science

Tools

Zephyr

FreeRTOS

Job description

Fuse Energy is seeking an Embedded Software Engineer to design, build, and scale connected hardware powering our Energy Network. You will work hands-on across embedded systems, networking, device security, fleet connectivity, firmware, hardware, and backend teams.

The role involves developing secure device messaging, implementing OTA update pipelines, and ensuring robust telemetry and observability across deployed devices, with collaboration from cross-functional teams.