About the Role

You will own embedded firmware across Rainmaker’s vehicle and its integration with our onboard and ground control software systems. Your scope includes flight-controller firmware, power distribution, sensor and payload controllers, and the interfaces connecting those systems to onboard Linux software. You will take work from architecture and board bring-up through testing, manufacturing, deployment, and support in the field. We’re looking for a high-agency engineer who identifies what needs to happen, turns incomplete requirements into a clear plan, and follows through until the hardware works reliably in real operating conditions. This is a hands-on technical ownership role with the autonomy to shape the firmware architecture and the responsibility to deliver it.

What You'll Do

Own the architecture, implementation, and maintenance of all embedded firmware across the vehicle, including flight-controller firmware, power distribution, sensors, and seeding payloads.

Set firmware priorities, identify reliability risks and technical gaps, and drive projects from an ambiguous problem to a validated release.

Bring up new boards with electrical engineers: read schematics, validate interfaces, write drivers, and debug failures at the boundary between hardware and software.

Develop dependable device communication and command handling over CAN, UART, SPI, and I2C, with clear contracts for telemetry, timing, and fault behavior.

Integrate firmware with our vehicle software so commands, device state, and telemetry behave consistently from the microcontroller to the operator.

Design and validate safe startup states, watchdogs, interlocks, and recovery behavior for resets, communication loss, sensor faults, and interrupted updates.

Own firmware builds, versioning, flashing, over-the-air updates, and recovery workflows so deployed vehicles run known, traceable software.

Build automated tests, simulation, and hardware-in-the-loop coverage that catch regressions and exercise failure modes before releases reach the fleet.

Partner with manufacturing and flight operations to make provisioning, calibration, diagnostics, and servicing repeatable and practical.

Investigate bench and field failures using logs, telemetry, and lab instruments; resolve root causes and turn what you learn into better software and tests.

What We're Looking For

3+ years of hands-on experience developing embedded software or firmware for microcontroller-based systems, including board bring-up, hardware integration, and deployment into production or field use.

Demonstrated ownership of an embedded subsystem from design through release and ongoing support, including making technical decisions independently, validating behavior on hardware, and resolving failures in real operating conditions.

Strong systems programming skills in Rust and/or C/C++, with the ability and willingness to work across both Rust and C/C++ codebases.

Practical experience with peripheral drivers and communication buses such as CAN, UART, SPI, and I2C.

Comfort reading schematics and using oscilloscopes, logic analyzers, and hardware debuggers to isolate problems across electrical and software boundaries.

The ability to reason about system failures and implement robust state machines, fault detection, safe outputs, and recovery paths.

Experience building maintainable firmware with version control, reproducible builds, automated testing, and disciplined release practices.

Evidence of high agency: you surface problems without waiting to be assigned, make sound decisions with incomplete information, ask for help when it matters, and close the loop on results.

Clear communication and the ability to work closely with hardware engineers and operators, explain tradeoffs, and document decisions so others can build and service what you ship.

What Will Set You Apart

Experience with drones, robotics, aerospace, or other systems where software controls physical equipment in demanding conditions.

Familiarity with PX4, MAVLink, flight-controller development, or flight-critical software.

What Success Looks Like In the First 90 Days

You have mapped the vehicle’s firmware, hardware interfaces, build and update paths, and most consequential reliability risks, and the team has a clear plan for what to address first. You can independently build, flash, instrument, and debug the key embedded systems and trace their behavior through our vehicle software. You have delivered a meaningful firmware improvement through bench and integration testing into an operational release, working with flight operations to verify its behavior in the field. You have improved at least one recurring source of friction in testing, provisioning, updates, or diagnostics, and established a practical ownership and release cadence for the firmware stack.

146000 - 197000 USD a year