I have known Kornel for years and I am pleasantly surprised that he is not only an expert in the area of digital marketing, but also a person with great values. This is why I highly recommend Kornel and Harbingers, because they are interested in developing a long term relationship.
E-commerce, Digital Transformation Manager
I had the pleasure to work with Filip on a content marketing project. I consider my cooperation with him very successful. ... Filip's interpersonal skills are priceless - he is communicative and able to work out a compromise. I recommend Filip and I hope that this is not our last opportunity to cooperate.
Digital Marketing Coordinator
In Szlachetna Paczka we had the pleasure to work with Piotr on many campaigns.. He showed extraordinary commitment and dedication to the projects he carried out.
Marketing and Technology Manager at WIOSNA
Cooperation with Piotr is pure pleasure. His knowledge helps every business to grow.
Ela Goczyńska Han
Marketing Director, PRESTO
I have been cooperating with Piotr, as online marketing expert, for almost seven years. I am impressed by his professional approach.
Communication Specialist, PKP Polish Public Railways