Senior Embedded Software Engineer

At Arc, we are on a mission to amplify employees at local businesses using AI. With years of experience building and scaling commerce tools for businesses—from farmers markets and neighborhood coffee shops to global retailers, restaurant chains, and major sports venues—we know how to deliver mission-critical technology that integrates easily, delights customers, and works every time.

Voice drive-thru is our first product on that journey: an AI voice agent that takes real orders at the drive-thru speaker, in real time, integrating directly with a business's existing POS and hardware. Every order runs through a physical device we build and maintain ourselves — a microcontroller wired into the lane's audio and vehicle-detection hardware, paired with an edge compute node that streams audio to and from our backend. Done well, this means more revenue, faster lines, and fewer mistakes for the operators we serve — and it means the hardware and firmware underneath it have to work every single time, with no one around to reboot it.

As an Embedded Software Engineer, you'll own the software that runs on our edge devices in the field: the microcontroller firmware controlling status LEDs, audio bypass relays, and vehicle detection, and the host application that keeps audio flowing reliably between our hardware and the cloud. This is a high-leverage, high-autonomy role for someone who wants to shape how a physical product behaves in the real world, not just execute tickets.

You'll have significant influence over both the product and the engineering culture at an early-stage company solving a genuinely hard, high-stakes problem: physical devices that have to work flawlessly at real drive-thru lanes, in service of a mission to help local businesses run better. Voice drive-thru is just the beginning — your decisions will help shape what comes next.