Senior Firmware Engineer

We’re hiring a Senior Firmware Engineer to help build and scale connected hardware products at a rapidly growing, late-stage technology company. This is a hands-on role for an engineer who enjoys working close to the hardware, solving difficult system-level problems, and shipping reliable software across large device deployments. You’ll join a high-ownership engineering environment where firmware directly affects product performance, reliability, manufacturing, and the end-user experience. The ideal candidate brings strong embedded C/C++ depth, practical hardware-debugging skills, and experience supporting deployed connected devices through the full product lifecycle. What You’ll Do Design, develop, test, and maintain production firmware for resource-constrained embedded devices. Build low-level software in C/C++ for systems with limited memory, processing capacity, and power budgets. Develop and integrate drivers for sensors, peripherals, and external components. Implement and troubleshoot communication interfaces and protocols, including UART, I2C, SPI, USB, and wireless connectivity. Work with hardware engineers during board bring-up, validation, root-cause analysis, and production readiness. Analyze schematics, component documentation, and board-level behavior to diagnose complex firmware and hardware interactions. Develop software for bare-metal and lightweight task-management environments, including systems that do not rely on a conventional RTOS. Support wireless features involving Bluetooth, Wi-Fi, and related connected-device capabilities. What You’ll Bring 5+ years of professional software-engineering experience, with substantial hands-on firmware or embedded-systems development experience. Strong C and/or C++ programming skills for embedded or low-level systems. Experience developing firmware for constrained devices, including memory-sensitive and compute-limited systems. Background writing peripheral drivers and working directly with hardware interfaces. Strong understanding of serial and device communication protocols, such as UART, I2C, SPI, and USB. Experience with DMA, interrupt-driven programming, timing-sensitive code, and low-level debugging. Ability to read and work from hardware schematics, datasheets, and board-level design documentation. Nice to Have Experience deploying and maintaining firmware across a large installed base of physical devices. Experience with over-the-air firmware updates, remote troubleshooting, device telemetry, and fleet-health monitoring. Exposure to cloud-connected IoT systems and the backend services that support device provisioning, monitoring, and updates. Experience supporting hardware from early prototype stages through manufacturing and field deployment. Background working in a high-growth startup, consumer hardware, robotics, IoT, mobility, industrial systems, or another connected-device environment. Why This Role This is an opportunity to have meaningful ownership over firmware that ships in real products and operates at scale. You’ll work with a strong cross-functional engineering team, take on technically challenging problems across hardware and software, and help shape the systems and practices that support a rapidly expanding product footprint. #J-18808-Ljbffr Colossus Technologies Group