Artur Karczykowski built and ran his own marketing and technology companies before co-founding Sunfish Partners, and he still works part-time with the fund while also serving as a Marketing Director and advisor to Polish public companies, regularly judging early-stage startups at events like ReaktorX and Infoshare, and advising founders to research a fund first, rely on warm introductions instead of cold outreach, and know that he weighs the team behind a project above things like market size or technology. He has backed technically demanding companies such as PerfOps and Molecule.one, and his early work scanning hundreds of Polish startups, together with his studies in Mannheim, Heidelberg, and Ludwigshafen and his fluency in Polish, German, and English, reflects the link between Germany and Poland that has shaped Sunfish since it started.