Firmware Engineer

About This Role

This engineering role focuses on developing robust, high-performance firmware for home robots and wearables, encompassing sensing, networking, motor control, and power distribution. The engineer will own multiple new boards from initial hardware design through integration into the robot, collaborating closely with various engineering teams to solve complex hardware and software problems.

Responsibilities

• Own firmware end-to-end across wearables and robots, from architecture and implementation through integration and production
• Write high-performance host-side systems software serving as the interface layer between firmware and higher-level software
• Develop robust communications, OTA, and diagnostics infrastructure for embedded devices
• Work with the EE team to design and bring up new hardware
• Solve difficult cross-functional problems spanning hardware, firmware, embedded Linux, and higher-level software

Requirements

• BS or MS degree in Computer Engineering, Electrical Engineering, a related technical field, or equivalent practical experience
• 3+ years of real-time embedded software development, with experience in areas such as architecture design, MCU selection, driver development, and working with RTOSes
• Proficiency in an embedded systems programming language, such as C, C++, or Rust
• Experience with debugging, instrumentation, and performance optimization across hardware, firmware, and host-side systems software
• Experience working with electrical engineering teams, with the ability to read and understand board schematics and layouts
• Experience with communication protocols such as I2C, SPI, UART, CAN (FD), or Ethernet

Nice to have:

• Delivered at least one project from prototype through mass production
• Experience building robust, failure-tolerant firmware OTA pipelines
• Experience with Ethernet firmware and communications protocol design, especially involving PTP-based time synchronization
• Experience with embedded Linux, build systems (Bazel, CMake), or multi-device system architecture
• Familiarity with common control techniques for robot actuators, including cascaded feedback control, PID tuning, and torque control
• Experience with HIL testing, production validation software, or fleet-wide hardware observability
• Experience developing or porting platform firmware, including coreboot, UEFI/BIOS, secure boot, or TPM integration

About the Company

Sunday is developing personal robots to reclaim hours lost to repetitive tasks, with an ambitious goal to make generalized robots broadly accessible. The company has spent the last 18 months building a talented team, securing capital, and validating its technology, and is now in a growth phase.