De-risk first
We chase the scariest unknown before anything else. Confidence should come from a working experiment, not from optimism in a schedule.
// about
Why the name? A mutex keeps things from colliding.
It's the small primitive that lets complex systems stay correct under pressure — exactly what good firmware does for a product. That's the standard we build to.
MutexFirmware is an embedded engineering practice for teams building real hardware — connected devices, sensors, instruments, and the awkward one-off products that don't fit an off-the-shelf module.
The work grew out of years spent where firmware and physics meet: writing bare-metal and RTOS code for resource-constrained microcontrollers, bringing up boards with nothing but a scope and a datasheet, and doing RF research on passive UHF RFID sensing — antenna characterization, electromagnetic simulation, and the slow, careful measurement that wireless products actually depend on.
That background shapes how we approach every engagement. We're comfortable in the uncomfortable parts of a project: the timing bug that only appears at temperature, the radio that works on the bench and fails in the enclosure, the power budget that doesn't close. Those are the problems we like.
Firmware isn't done when it compiles. It's done when it survives the field.
We keep engagements small and senior — no layers between you and the person writing the code. You get direct communication, decisions written down, and firmware you can hand to your own team without a translation layer.
// principles
How we think about the work.
Readable beats clever
Firmware outlives the people who wrote it. We write code your team can read, debug, and extend a year from now.
Measure, don't assume
Especially with power and RF. An oscilloscope and a VNA settle arguments that opinions can't.
Honest scope
If we're not the right fit, we'll say so and point you somewhere better. A good referral beats a bad engagement.
// snapshot
Where we're strongest.
Domains
Connected devices · sensing & instrumentation · industrial · RFID / wireless
Firmware
Bare-metal · FreeRTOS · Zephyr · drivers · bootloaders · OTA
RF work
UHF RFID · BLE · LoRa · antenna tuning · Ansys HFSS simulation
Hardware
Board bring-up · schematic / layout review · low-power design
Ways to engage
Fixed-scope projects · monthly retainer · advisory / consulting
Let's talk about your product.
Whether it's a fresh design or a project that's stuck, we're happy to dig into the details.