Senior Embedded Firmware Engineer

ABOUT BRELLE ENERGY FOR WHAT MOVES US. Brelle is a venture-backed technology company building the next generation of energy and powertrain systems for the world’s most demanding machines. Our team comes from companies like Rivian, SpaceX, and McLaren, bringing deep expertise in high-performance engineering, electrification, and advanced manufacturing. Brelle develops frontier technology that pushes what’s possible in electrified performance. Based in California, we develop next-generation energy and powertrain technology for supercars and superbikes, working alongside leading high-performance brands across the U.S. and Europe. Our innovations are built on a novel pack architecture, a full-stack software platform, and an advanced approach to automated production. Joining Brelle means working on technology that makes the world’s most demanding vehicles and aircraft lighter, safer, more engaging, and capable of charging in minutes. Our engineering teams operate like small Skunkworks teams: nimble, cross-functional, and highly technical. Engineers are encouraged to explore new concepts and materials, move quickly from concept to prototype, and have significant autonomy to develop, validate, and release their work across programs. We’re building something ambitious in a highly competitive market, and the bar is high. We need people who are exceptional at what they do, take real ownership, and are willing to do what the moment requires. ABOUT THE ROLE As a Senior Embedded Firmware Engineer, you'll be a core technical owner of Brelle's embedded platform—the software foundation powering our vehicle architecture and ECUs. You'll work across the embedded stack, from RTOS and low-level drivers through diagnostics, communication protocols, and platform architecture. You'll work closely with electrical, battery, systems, and vehicle teams to bring ECUs from first power-on through validation and into real superbike and supercar programs. This is a hands-on, high-ownership role. You'll be expected to make architectural decisions, get into the hardware when things don't work, and drive problems through to production. WHAT YOU'LL DO - Develop and release production-grade firmware in C/C++ for MCU peripherals and external components including SPI, I2C, UART, CAN/CAN-FD, ADC, DMA, and timers - Architect clean abstractions across RTOS, drivers, middleware, and application layers - Lead ECU bring-up from first power-on through validation - Develop production-grade diagnostics and vehicle communication including UDS, CAN, CAN-FD, Ethernet, and LIN - Shape the structure and evolution of Brelle's embedded codebase, build systems, CI/CD, and development tooling - Work hands-on with hardware in the lab and with vehicle teams during integration and validation - Help establish engineering practices that allow us to move quickly without compromising reliability or safety - Mentor other engineers and raise the technical bar through design reviews, code reviews, and collaboration WHAT WE'RE LOOKING FOR - 5+ years developing production firmware in C/C++ for resource-constrained embedded systems - BS/MS in Electrical Engineering, Computer Science, or a related field - Deep understanding of RTOS concepts, concurrency, memory management, and real-time constraints - Strong experience with MCU peripherals, device drivers, and hardware/firmware debugging - Expert with Git, build systems, and CI/CD - Experience taking embedded software from development through validation and production - A track record of owning technically complex problems and driving them through to completion PREFERRED QUALIFICATIONS - Automotive, motorsport, powersports, aerospace, robotics, or other safety-critical experience - AUTOSAR, ISO 26262, or ASPICE - FreeRTOS, SafeRTOS, or other RTOS experience - NXP MCUs, toolchains, and SDKs - ECU development from bring-up through production YOU ARE... Exceptional at what you do — You have a track record of doing excellent work, solving difficult problems, and raising the bar for the people around you. We're a small team, and we need people who can operate at a very high level without needing a lot of direction. An Owner — You take responsibility for outcomes, not just tasks. You see what needs to happen, make decisions, and drive problems through to completion. Curious and Rigorous — You dig into hard problems, reason from first principles, and care about getting to the right answer—not just the fastest answer. High Standards, Low Ego — You care deeply about technical excellence while being collaborative, direct, humble, and good to the people around you. You make the team better, not just yourself. Willing to Lean In — We're building a company in a highly competitive market, and we're still proving ourselves. Most weeks should be sustainable, but there will be moments when the company needs us to sprint. When the moment matters, we expect people to step up, take ownership, and show up for the team. COMPENSATION & BENEFITS Base Salary: $165,000–$225,000 Meaningful equity participation through Brelle's Employee Incentive Plan. - Medical, dental, and vision (HMO/PPO) - 401(k) - Flexible PTO - Team meals twice a week - Monthly team events Build something exceptional. Own your work. See it move.