Company: Fulfil Solutions

Location: Mountain View, CA (On-site)

Team: Firmware / Embedded Systems

Compensation: $140,000 base salary + equity + benefits

About the Role

Fulfil is looking for a Firmware Engineer to join our Embedded Systems team. You'll work on the low-level software that drives our custom robotics hardware - implementing protocols, building control logic, and helping bring new hardware to life in a fast-moving production environment.

This is a hands-on individual contributor role. You'll work closely with senior engineers and cross-functional teammates in hardware, software, and systems integration to implement firmware that is reliable, testable, and built to last.

What You'll Do

Firmware Development Implement robust firmware in C/C++ for ARM-based microcontrollers and Linux-based SBCs. Develop and maintain protocol implementations across CAN bus, I2C, UART, SPI, and Modbus.

Hardware Integration Participate in bring-up and validation of custom hardware. Use oscilloscopes, logic analyzers, and multimeters to debug at the hardware/firmware boundary.

Motion & Control Implement motor control sequences including encoder-based positioning, tuning, and jerk limiting under the guidance of senior engineers.

Interface Development Work with gRPC and Protocol Buffer interfaces to expose hardware services to higher-level systems cleanly and safely.

Testing & Quality Write unit tests and contribute to HIL (Hardware-in-the-Loop) test environments. Debug issues across firmware logic, sensor integration, and timing.

Cross-Functional Collaboration Work with hardware, software, and systems teams to understand interface contracts and align on firmware behavior.

What We're Looking For

Required

• Located within commuting distance of Mountain View, CA
• 2-4 years of experience in embedded firmware development
• Solid C and C++ skills in an embedded Linux environment
• Working knowledge of embedded communication protocols: CAN, I2C, SPI, UART, or Modbus
• Experience with hardware debugging tools (oscilloscope, logic analyzer, multimeter)
• Familiarity with Linux-based SBCs (Raspberry Pi, NXP i.MX, or similar)
• BS in Computer Science, Electrical Engineering, or equivalent practical experience

Preferred

• Exposure to gRPC and Protobuf interfaces
• Experience with motion control, encoder feedback, or motor tuning
• Familiarity with build systems such as Bazel or CMake
• Experience with version control and CI/CD practices for firmware
• A maker or tinkerer background - robotics competitions, hobby electronics, hardware hacking