Fractional Product Development Lead

I turn hardware ideas into shippable products.

From first concept to series production — for startups and scale-ups that need a partner, not a vendor.

Martin Greň
Products I've worked on

Selected work

Products that made it to production.

Services

How we can work together

Whether you need a fast diagnostic or a long-term partner — there's a format for that.

Recommended start
Fixed scope · Fixed price

Product Readiness Audit

€3,000 5 days

A written assessment of your product's technical and manufacturing readiness — what works, what doesn't, and what to fix before you scale.

Book an audit →
One day · Online or on-site

Product Strategy Workshop

From €2,500

One intensive day with your founding team. You'll leave with a product roadmap, a clear spec, and a shortlist of the right suppliers.

Schedule a workshop →
Retainer · Min. 3 months

Fractional Product Lead

I work as your embedded Head of Product — present, accountable, hands-on.

Starter · 2 days/mo €2,400/mo
Growth · 4 days/mo €4,500/mo
Partner · 8 days/mo €8,500/mo
Let's talk →
Full project

Product Development

From €15,000

End-to-end product development — from first concept to series production. I lead the project and coordinate a vetted network of engineers and manufacturers.

Get a quote →

Need something more flexible? Available for ad-hoc consulting at €100/hour.

Book a call →
Martin Greň

About

I work as an embedded partner, not an outside consultant.

11+ years building physical and digital products — from flying-car control systems to robotic drives and new-generation vehicle interiors. I treat product development as the intersection of hardware, software, and manufacturing. As a design engineer / konstruktér I find the technical and technological solutions that others get stuck on.

11+ years
6+ shipped projects
3 languages

Ready to talk?

Book a free 30-minute discovery call. No pitch, no pressure — just a conversation about your product.