Jens Lapinski is General Partner and Founder of Angel Invest, one of Europe's most active pre seed and seed stage funds. Angel Invest invests in 50 companies pre seed and seed companies per year.

Jens is also a former founder and operator turned VC, who has seen 100+ companies go through product market fit iterations.

Jens is also an investor in Index Health (Luka's company) so I've personally seen Jens in action and Jens is one of the best, and most knowledgable people on finding PMF, and scaling it!

We discuss process, iterations, feedback, and qualities all founders should have (quick iterations).

Resources:

4 Steps to the Epiphany

The Category Design Tool Kit