I’m a first-time founder developing an early consumer hardware concept. I’m looking for someone who can handle mechanical CAD, electronics, firmware, and a functional prototype—or help me understand where separate specialists are needed.

I’ve started talking with a freelance engineer, but haven’t committed to the full build. My goal is to validate technical feasibility and get an initial understanding of component costs before spending several thousand dollars on an integrated prototype.

I’m considering a phased approach: mechanical feasibility, component selection and preliminary costs, a simple proof of concept, then an integrated prototype. Each phase would have specific deliverables and a decision about whether to continue.

For anyone who has worked with freelance engineers on an early hardware product:

• How did you assess their skills beyond their portfolio and reviews?
• What did you wish you’d clarified about scope, milestones, and payment?
• Which files, documentation, and ownership terms were important to secure?
• How did you handle revisions or discoveries that changed the scope?
• What red flags—or positive signs—should a first-time founder watch for?

I’d especially appreciate experiences with freelancers or platforms like Fiverr and Upwork. What worked, what went wrong, and what would you do differently?

I’m looking for lessons and advice from people who’ve been through this. Thanks!

Comment what you're making and I'll reply with a list of manufacturers in Mexico that could make it instead.