Principal Engineer, ML Systems

About Circuit

Circuit is the AI execution layer for the physical economy.

Industrial and manufacturing enterprises run on expertise: the hard-won knowledge of how complex products are engineered, configured, sold, and supported. That expertise is scarce, slow to transfer, and walking out the door as a generation of experts retires. It lives in PDFs, spreadsheets, and the heads of a few people, and the hardest technical decisions wait on whoever happens to know.

Circuit puts expert judgment in everyone's hands. We capture how the best people make critical technical decisions and turn it into agents that do the judgment-heavy work, so anyone, regardless of skill level, can make the right call, from quote to install and support, with the accuracy these environments demand.

Circuit is built by operators. Our leadership team has built and scaled real industrial companies, and we are already live in production with category-leading manufacturers. We are not bolting AI onto an old playbook. We are building the layer that runs the last mile of how the physical economy executes.

The Role

As a Principal Technical ML Engineer, you are a strong software engineer first, with deep hands-on experience in ML systems and model serving infrastructure. This is not a research role and it is not an architecture role. It is a hands-on Principal IC role with high ownership where all your technical judgment shows up in shipped systems.

You will work closely with other AI/ML engineers to understand what they are building and drive it through to shipped product. The gap between promising research and working software is where you operate. You bring the engineering discipline to close that gap reliably and repeatedly.