Content for online businesses

Writers_pl is existing since 2011, the first platform in Poland to improve the cooperation of copywriters with clients. My task was to design the corporate identity of the company with a responsive website.



  • Branding
  • Wireframing
  • RWD Webdesign
  • Icons

Genena Woodson Armstrong

ACC, SPHR, SHRM-SCP ICF Certified Professional Coach | Culture & Inclusion Consultant | Advocate for Women, Young Girls and # BossBabes · Linkedin

“Mariusz is amazing! He is the creator of my logo and I couldn't be more pleased. I was able to share with him my vision for my business and he creatively translated into graphic form. Metamorphosis Coaching is forever grateful. I highly recommend. 5 stars on customer service and timeliness as well.”


Iain Clarke

Global Partner Executive, Enterprise Cloud Services · Linkedin

“I initially engaged with Mariusz after reviewing his portfolio that confirmed he was an innovative designer, demonstrating vast experience and knowing the latest trends. I have been working with him on two personal projects over the past two years and it is always a pleasure. He communicates well, provides excellent guidance and feedback on your project. He has always been very fair on price and you can see his personal commitment to ensure you are happy with the outcome. I highly recommend Mariusz and willing to provide a verbal reference if required.”


Jimmy Chebat

Visionary Entrepreneur, Business and Team Developer · Linkedin

“Mariusz was great to work with! His design skills are always up to date an unique. He's on top of the latest trends and delivers top quality work. I always enjoy working with Mariusz and love his work.”


Farnaz Fazaipour

Director at Palace Gate & Founder of Centrallisting.com · Linkedin

“Mariusz is a professional who is also a talent UI developer. We were very pleased with the designs he produced for us and would certainly work with him again.”


Berkat Bhatti

Full Stack IOS Developer - Founder | CEO TheKnightMarket LLC · Linkedin

“Mariusz is a very talented UI/UX designer. He generated pages accordion to my vision and captured everything we anticipated. Finding a good designer can be difficult be glad we hired Mariusz. I would highly recommend and use him again for future projects.”


Dilip Patel

Partner · Linkedin

“Mariusz has an aptitude for aesthetics and understanding clients that makes him stand out from the others. His designs are immersive and as one sinks into the detailed design study, one can never come out thinking of iteration. He pays attention to what you say during consultation sessions and tries to capture the essence of your requests in his designs. He doesn’t just create something that looks visually pleasing and engrossing, but he also makes sure that it reflects the values of your application be it web or mobile.”


Kaia Juszczak (Pichler)

Creative Director · Linkedin

“I had a pleasure to work with Mariusz both as his direct supervisor and client when he was a freelancer. I choose to work with Mariusz on grounds of his deep knowledge and expertise in graphic and UX design field. I appreciate his personal attitude as an engaged and proactive person. He always meets the deadlines and the budget. Mariusz's works always meet client's expectations and bring measurable results. I strongly recommend working with Mariusz.”


Yannick Tessier

Co-Founder & CEO at VOG digital · Linkedin

“I've had the great pleasure of working with Mariusz on a high-caliber dev team for a new mobile app project and can attest to the refreshing quality of his design work. He provides a great sense of vision to all UX and UI concerns in addition to being a great person to work with. The language barrier (Polish/English) although sometimes present, has been easy to overcome. I would work with Mariusz again in a heartbeat!”


Roch Kudła

Online Director at Grupa Radiowa Agory · Linkedin

“Working with Mariusz is the comfort that your project is in very good hands. He creates excellent UX and graphic designs, works quickly and accurately, has a lot of knowledge and experience which he uses in designing. You do a great job Mariusz - thank you! :)”


Bartek Bronk-Marwicz

Luxury Real Estate Agent · Linkedin

“Mariusz is a professional who has done for us design of our website and has provided Domazur Luxury Homes with wild range of other services, including Branding, UI / UX, Development, CMS. As a luxury real estate agency, based in French Riviera, we were very pleased with the designs he produced. It was a pleasure working with Mariusz, and I am positive it will continue to be a pleasure, working with him in the future.”


Marcin Kapiński

Legal Counsel in kslf.pl · Linkedin

“I had the pleasure to cooperate with Mariusz Onichowski on the implementation of several projects. Each time, this cooperation turned out to be very fruitful and we managed to achieve our goals. Mr. Mariusz Onichowski is an extremely creative creator, he can perfectly understand the client's needs and meet them while maintaining his original style. I sincerely recommend cooperation with Mariusz Onichowski due to the high professionalism, commitment and always an individual approach to the client.”


Szymon Przybyszewski

Owner of Writers.pl · Linkedin

“Mariusz has completed two important projects for our company. I hope not last. The cooperation was exemplary. We had great contact all the time, which continued even after the projects were closed when Mariusz (even though he didn't have to) checked how everything looks on the landing pages. The work done was of a high standard.”