Senior Firmware EngineerLocation: Bristol; HybridJoin us at Smartbox as a Senior Firmware Engineer!Are you a passionate Firmware Engineer wanting to make a real impact by giving a voice to those without speech Smartbox is looking for a dedicated individual to help improve the lives of people with disabilities.Your ImpactAs our Senior Firmware Engineer, you will:Technical Project Delivery: Deliver multi disciplinary projects, meeting scope, time, budget and quality requirements, and coordinating others as needed.Firmware Architecture and Lifecycle: Develop reliable, portable firmware with a long-life cycle.Firmware Development: Design, develop and maintain embedded firmware in C for Zephyr RTOS and Embedded Linux, including board bring up, drivers and HALs.Code Quality and Standards: Set and uphold coding, documentation and review standards, ensuring best practices in architecture, modularity, fault tolerance and testability.Test strategy and Automation: Apply strong automated testing practices following the Test Pyramid, including unit, component, contract and hardware in the loop tests, with CI automation to prevent regressions.Test Software and Tooling: Build and maintain automated test harnesses, GUIs and utility tools (e.g. Python, C#) to support development, validation and manufacturing.Libraries and Developer Experience: Create libraries and demo applications in C compatible languages (C#, C++) to support subsystem validation and cross team integration.Verification and