"We have been working with Mariusz on a monthly basis for all our newsletter requirements. Mariusz is definitely a technical expert. He is working fast, and always perfectly. We never faced a single issue since the beginning. But more than anything, he brings value to our team by making the right recommendations and choices. In reality, our main issue is to not have enough work to keep him 100% . Thanks for everything Mariusz!"

"Our company has been an ongoing client of Mariusz O. for 2-3 years now. He designs our monthly newsletter that we send out to our clients, and he's superb to work with! He comes up with designs quickly and is prompt to make adjustments when we have a last-minute addition or idea for our campaigns. Our open and click rates on our emails have seen a steady increase since we started working with Mariusz. And recently we had a client tell us how impressive our email newsletters look every month - a true testament to Mariusz's technical skills and creative abilities. We highly recommend Mariusz and look forward to a long continued partnership with him in the future."

"Mariusz has provided reliable technical support for our program needs, and is a very capable front-end developer. He works efficiently within time constraints, and always produces high-quality, carefully coded content. I highly recommend him."