Senior Firmware Engineer — IoT, Embedded C/C++, RTOS

Centrica; Windsor; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Car allowance

Employee energy allowance

Company pension

Job summary

Hive, part of Centrica, is seeking a Senior Firmware Engineer to lead a small team and own firmware from concept to delivery for our growing range of consumer IoT products. You will design robust architectures, implement scalable features, and collaborate with product and cross-functional teams to shape the roadmap.

You will work in a UK-based hybrid role, travel occasional to site, and apply best practices in security, testing, and CI/CD to deliver high-quality customer experiences across

Qualifications

• Strong expertise in embedded C/C++ development within real-time operating environments, including FreeRTOS and other resource-constrained systems.
• Proven experience developing connected IoT products using ESP-IDF, Wi‑Fi, BLE, Zigbee, and 802.15.4, with Silicon Labs MG2x and Zigbee Application Framework experience highly desirable.
• Solid understanding of embedded security, including secure boot, OTA updates, provisioning, certificate‑based identity management, and secure device communications.
• Experience building cloud‑connected devices, leveraging MQTT and AWS IoT Core services, including TLS, X.509 authentication, and device shadow technologies.
• Strong focus on software quality and performance optimisation, with expertise in memory and flash management, automated testing, and CI/CD practices for embedded systems.
• Forward‑thinking approach to engineering, including the use of AI‑powered tools to accelerate delivery, improve productivity, and enhance software quality, alongside knowledge of emerging technologies such as Matter and Thread.

Responsibilities

• Act as the technical lead for a small firmware engineering team, providing direction, guidance, and ownership of firmware development activities.
• Design and implement robust, scalable firmware architectures that support current and future Hub platform capabilities.
• Develop, test, troubleshoot, and optimise firmware features to deliver high-quality, reliable customer experiences.
• Champion modern software engineering practices, ensuring solutions are maintainable, secure, and built to the highest standards.
• Drive consistent code quality through peer reviews, mentoring, and knowledge sharing across the engineering team.
• Collaborate closely with Product Managers and key stakeholders to define requirements, prioritise work, and shape the product roadmap.
• Support a culture of continuous learning, innovation, and technical excellence within the wider engineering community.

Skills

Embedded C/C++

RTOS

IoT hardware integration

Firmware leadership

Tools

ESP-IDF

FreeRTOS

MQTT

AWS IoT Core

Job description

Hive, part of Centrica, is seeking a Senior Firmware Engineer to lead a small team and own firmware from concept to delivery for our growing range of consumer IoT products. You will design robust architectures, implement scalable features, and collaborate with product and cross-functional teams to shape the roadmap.

You will work in a UK-based hybrid role, travel occasional to site, and apply best practices in security, testing, and CI/CD to deliver high-quality customer experiences across