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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Firmware Engineer - **Company:** Arctic Research and Development - **Location:** Cirencester, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Assembly Language, Unit Testing, Booting (BIOS), C++ (Programming Language), Software Quality, Computer Engineering, Software Debugging, Embedded Software, Firmware, FreeRTOS, Hardware Design, Joint Test Action (IEEE Standards), Real-Time Operating Systems, TCP/IP, Universal Asynchronous Receiver/Transmitter, Serial Peripheral Interface, Git, Integration Tests, Bare Metal, Software Coding, Software Version Control - **Published:** July 25, 2026 - **Apply:** https://uk.indeed.com/viewjob?jk=118e122ea1ef7bd3 ## About the Role * 5+ years of embedded firmware development experience in C for ARM or equivalent processors. Priori experience with the STM32 family of processors is desirable. * Proven track record developing and delivering firmware from creating requirements, architecture design, implementation through to release including use of Git * Experience working with SPI, I2C, UART protocols is essential * Experience with RTOS and bare-metal design, in particular using FreeRTOS and Zephyr * Understanding of bootloaders and OTA for updating multi-processor products * Experience debugging on real hardware and confidence using basic equipment such as logic analysers and oscilloscopes * TCP/IP and networking experience is a bonus but not essential * Degree in a related engineering discipline such as firmware, software or electronics is a plus however not essential. Experience is highly valued! * Willingness to test in the field to prove functionality and compliance * Self-driven attitude and confidence working in a startup where you will be the subject matter expert. NICE TO HAVE * Understanding of electronics design such as how to read a schematic and soldering. ## Description We're looking for a Senior Firmware Engineer to join our small team to help develop high-reliability firmware for deployment into some of the most challenging places on earth. You will be writing firmware for embedded processors (ARM M4, M33 etc) interfacing with sensors and other products via SPI, I2C, TCP/IP, LoRA, UART and much more. You will have a real impact being responsible for firmware architecture, coding, testing and debugging across the ARD products. We want you to use your knowledge and experience to make key decisions and challenge other team members to make high quality products suitable for use in the Arctic., * Design & Development - Design, develop, and maintain embedded firmware for microcontrollers and microprocessors, writing efficient, reliable, and well-documented code primarily in C/C++ or assembly language. * Hardware Integration - Collaborate closely with hardware engineering teams to integrate firmware with electronic components, including sensors, communication interfaces (UART, SPI, I2C, CAN), and peripheral devices. * Testing & Debugging - Perform unit testing, integration testing, and system-level validation of firmware, using tools such as oscilloscopes, logic analyzers, JTAG debuggers, and emulators to diagnose and resolve issues. * RTOS & Boot Systems - Develop and optimize real-time operating system (RTOS) configurations, bootloaders, and interrupt-driven systems to meet strict timing and performance requirements. * Code Quality & Version Control - Maintain high standards of code quality through peer reviews, adherence to coding standards, and use of version control systems (e.g., Git) to manage firmware releases and revisions. * Cross-functional Collaboration - Work alongside software, mechanical, and QA teams throughout the product development lifecycle, contributing to technical documentation, design reviews, and supporting regulatory or compliance testing as needed. ## Related Videos - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [An Applied Introduction to eBPF with Go](https://www.wearedevelopers.com/videos/1075-an-applied-introduction-to-ebpf-with-go) - [Playing Pong on a shoulder press machine](https://www.wearedevelopers.com/videos/100140-playing-pong-on-a-shoulder-press-machine) - [More efficient software for more efficient microchips](https://www.wearedevelopers.com/videos/1164-more-efficient-software-for-more-efficient-microchips) - [Agent Smith Gets Hardware: Autonomous IoT Hacking From Debug Port to Cloud API](https://www.wearedevelopers.com/videos/100258-agent-smith-gets-hardware-autonomous-iot-hacking-from-debug-port-to-cloud-api) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) ## Related Articles - [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs) - [Is Software Engineering Hard?](https://www.wearedevelopers.com/magazine/448-is-software-engineering-hard) - [Should senior developers refuse interview coding challenges?](https://www.wearedevelopers.com/magazine/29-should-senior-developers-refuse-interview-coding-challenges) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [The Best Software Developer Blogs to Read](https://www.wearedevelopers.com/magazine/156-the-best-software-developer-blogs-to-read) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)