Senior Firmware Engineer - Drive Embedded, Connected Devices

Colossus Technologies Group; San Francisco (CA); On-site; USD 140,000 - 190,000; Full time

Job summary

Colossus Technologies Group in San Francisco is seeking a Senior Firmware Engineer to design, build, and scale firmware for connected hardware products, working close to the hardware and shipping reliable software across large device deployments.

You’ll own low-level C/C++ firmware, develop drivers for sensors and peripherals, validate UART/I2C/SPI/USB interfaces, and collaborate with hardware engineers from bring-up to production readiness and OTA updates.

Qualifications

• 5+ years of professional software-engineering experience with substantial hands-on firmware or embedded-systems development.
• 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.

Responsibilities

• 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.

Job description

Colossus Technologies Group in San Francisco is seeking a Senior Firmware Engineer to design, build, and scale firmware for connected hardware products, working close to the hardware and shipping reliable software across large device deployments.

You’ll own low-level C/C++ firmware, develop drivers for sensors and peripherals, validate UART/I2C/SPI/USB interfaces, and collaborate with hardware engineers from bring-up to production readiness and OTA updates.