Long time ago I spent some time working at now defunct Polish social network - Grono.net. I published a couple of blog posts there.

Allow me to performa a bit of web archeology:

• Jak działa wyszukiwanie najkrótszych scieżek
• 32 czy 64 bity
• Memoize cichy przyjaciel programisty which coincidentally was the last article published on that blog.