About CircuitHub CircuitHub is reshaping electronics manufacturing with The Grid, a factory-scale robotics platform that makes small-batch, high-mix electronics assembly radically more efficient. Think semiconductor-fab precision applied to the chaotic world of prototyping and low-volume production: a 10x throughput improvement in one of the world's most foundational industries. We've raised $45M from top-tier investors including Plural, Y Combinator and Google Ventures, and we're already profitable. Our customers include a major EV maker, a top AI lab and many of the worlds largest companies. The Grid isn't a prototype. It's live, scaling fast and delivering real revenue, and we're building the team that will scale it further. The role Mechatronics Engineers at CircuitHub own projects end to end. You'll start with a problem, often on our factory floor, and take it all the way to a working machine: • Understand the problem and turn it into a clear specification • Generate ideas and choose the right mechanism • Design it in CAD and prove it out with the engineering calculations • Prototype and build it, machining parts in our in-house CNC shop • Bring it to life with software on our in-house robotics operating system We work AI-first. AI tools help you scope the problem, drive your CAD, run the calculations and write the machine software. The software side needs basic software engineering skills, not a software background: you'll write it with AI agents, supported by a dedicated software engineering team who build the operating system. You must have built things before, ideally robots, whether as a hobbyist, student, employee or founder. We don't hire narrow specialists. We want engineers who can: • Diagnose system-wide failures from first principles • Prototype mechanical and software fixes on the fly • Work autonomously and communicate clearly with a team spread across sites • Take responsibility for how their machines perform in live production Things you'll do This is a design role with hands-on prototyping. For example: • Conceive new mechanisms to handle electronics parts and other robotic handling tasks, using AI to scope and specify the problem • Design gantries and end effectors in Fusion 360 • Use AI agents to run the engineering calculations, and know when to distrust them • Machine prototype parts in our in-house CNC shop • Analyse end-effector behaviour from video and revise its geometry and control approach to improve throughput and reliability • Program machine behaviour on our in-house robotics operating system, with AI agents doing the heavy lifting • Specify sensors that catch errors while a machine is running, or monitor a chemical process • Prototype and deploy a new test robot for in-line PCB validation • Commission your machines and hand them over to our build team to scale up • Work across our US and UK sites to share what you've learned and shape the roadmap Bonus skills • Experience programming machines, whether PLCs, robot controllers, embedded systems or Python • Programming and running CNC machinery • Design of chemical handling machinery • Optics Pay and level $80K–$200K depending on experience, plus equity. A candidate at the lower end of the range might have: • Built some systems before, with some exposure to robotics or automation • Seen parts and subsystems through to manufacture as part of a design team • Knowledge of designing for machining • A keen interest in moving their career towards practical robotics A candidate at the upper end might also have: • Led the build and deployment of large-scale automated systems • Written the software that controls their own machines • Designed for a wide range of manufacturing methods, from machining to sheet metal to injection moulding • Mentored more junior engineers The range isn't a hard limit: if you're an expert in all of the above, we still want to talk to you. Not quite so experienced but passionate and keen to learn? Talk to us too. Location Full-time on-site at our factory in South Deerfield, Western Massachusetts, 90 minutes from Boston, where the Grid runs in production today.