Job Description

Skills: ARM Cortex-M (or comparable) — in C, C++, or Rust., Experience building state machines for real-world hardware.

About the project

We're building a small, safety-critical kinetic munition delivered by an FPV-class airframe. The compute side is an electro mechanical safe and arm device (EMSAD).

The current codebase is Rust-on-Embassy, but we're language-agnostic on the role — strong C, C++, or Rust embedded engineers are equally welcome.

What you'll do

• Own firmware end-to-end: drivers, state machine, communication protocols, command surface, bring-up, qualification, OTA / programming flow.

• Build the host-testable simulation surface. The state machine should be testable on a laptop without flashing a board — and stay that way.

• Work shoulder-to-shoulder with the HW engineer on bring-up, register-map ergonomics, and timing.

• Carry the firmware through environmental qualification (thermal, EMC, vibration).

• Define and enforce the firmware-side safety case.

Required

• 5+ years of professional embedded firmware on ARM Cortex-M (or comparable) — in C, C++, or Rust.

• Deep comfort with interrupts, DMA, clocks, timers, low-power modes, linker scripts, memory maps.

• Strong with I²C, SPI, UART, USB CDC and debugging using scope / logic analyzer.

• Experience building state machines for real-world hardware.

• Discipline around testability and host testing.

• Working English, written and verbal.

Nice to have

• Rust embedded experience — Embassy, embedded-hal, defmt, probe-rs, RTIC, no_std ecosystem.

• Modern C++ embedded (C++17/20 in firmware).

• Async firmware experience (Embassy, Zephyr, FreeRTOS).

• Safety-critical firmware background: ISO 26262, DO-178C, IEC 61508, etc.

• Bootloader / DFU / secure-boot work.

• FPV / small-UAV firmware: Betaflight, MAVLink, INAV.

• C FFI / SDK bindings.

How we work

Small team, weekly hardware iterations, real boards on every desk. We expect concise, testable, safety-focused firmware development.

Note Candidate must be comfortable completing an initial 1-month onsite training period in Kearneysville, WV, after which they will relocate back to work from either San Francisco, Los Angeles, or Washington DC