I started working as a logistics specialist in a small chain of grocery stores (six stores), but here all purchasing calculations are still done in Excel. Fellas, maybe you know of more modern solutions? Where should I start transforming purchasing?

What is your job title? I have nothing to do with logistics, but I was recently looking for a carrier to deliver my motorcycle from France to Germany and found them on GetTransport. I accidentally stumbled upon their blog and found an article about procurement transformation https://blog.gettransport.com/news/evolution-procurement-challenges-opportunities/ . You can read it and see if it's something you're interested in. I am interested in how new technologies affect various fields, and their blog really has interesting information and case studies about their implementation in logistics.