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# Senior Embedded Engineer (RTOS)

- **Company:** Opportunitylumai
- **Location:** Oxford, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Advanced Configuration and Power Interface (ACPI), Artificial Intelligence, C++ (Programming Language), Computer Engineering, Data Centers, Software Debugging, Linux, Device Drivers, Embedded Software, Firmware, FreeRTOS, Joint Test Action (IEEE Standards), Linux Kernel, Linux-Powered Devices, PCI Express, Real-Time Operating Systems, Large Language Models, Bare Metal, Software Coding
- **Published:** October 6, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/senior-embedded-engineer-rtos/49361431

## About the Role

learning, and physics.Lumai has already secured over $15 million in investment from leading deep-tech investors like Constructor Capital, IP Group, PhotonVentures and government grants, and is scaling rapidly to deploy the fastest optical compute currently available globally.The RoleLumai's hardware needs software that runs reliably at the lowest levels of the stack. As our Senior Embedded Engineer, you will build the firmware, drivers, and RTOS-based control software that bring our AI accelerator to life - from initial power-on through to stable, performant operation in production systems.What You'll DoDevelop and maintain device drivers for Lumai's AI accelerator, targeting Linux kernel and bare-metal environmentsWrite and debug firmware for control and management processors alongside the main accelerator dieLead BSP bring-up for new hardware revisions: clock tree configuration, interrupt routing, peripheral initialisationImplement RTOS-based control tasks using FreeRTOS or equivalent,
ensuring deterministic scheduling and safe resource managementWork with hardware engineers to validate bring-up through JTAG debugging, oscilloscope analysis, and logic captureEstablish coding standards, review practices, and testing methodology for the embedded teamWhat We're Looking ForMust-Have5+ years of embedded software experience with C/C++ in production hardware productsProven experience writing Linux device drivers (character, platform, or PCIe drivers)Hands-on BSP bring-up experience on custom hardware - from schematic review to first OS bootSolid understanding of RTOS concepts: task scheduling, inter-task communication, memory protectionProficiency with hardware debug tools: JTAG/SWD debuggers, oscilloscopes, logic analysersBachelor's degree or higher in Electrical Engineering, Computer Engineering, or equivalent experienceStrong Preference ForExperience with PCIe driver development or DMA engine programmingFamiliarity with power management frameworks (ACPI, Linux PM

## Description

The OpportunityLumai is redefining how the world computes. We are an ambitious, venture-backed UK startup pioneering a breakthrough AI accelerator for data centers which uses 3D optical compute. Our radical technology uses light to perform computation at orders of magnitude faster speeds and at far greater scales than ever before, all whilst consuming far less energy than traditional approaches.Lumai is unlocking performance and efficiency gains that could transform the economics of AI and compute infrastructure and reshape how intelligence scales globally.If you are passionate about bringing groundbreaking technology to market, and want to be part of a team pushing the boundaries of what is physically possible, Lumai is where you can make it happen.About LumaiFounded in 2022, Lumai is a University of Oxford spinout using optical processing to accelerate large language models (LLMs) and other transformer-based AI systems. The team combines expertise in optical computing, machine