Mariana Ostanik

Mariana Ostanik – Designer

I'm an illustrator and designer who creates with warmth, cuteness and fun for babies and toddlers, with vast experience in children's market


I'm a Brazilian artist currently residing in Portugal. After years of working as a graphic designer in Brazil, my husband and I relocated to Europe in 2018, marking the turning point when I decided to fully pursue my passion for children's books. A lifelong passion for literature and illustration led me to become an illustrator, creating books that inspire young readers.

Nurtured by a love for art and imagination, I embarked on a journey as a children's editorial illustrator and designer.

My passion for creating cute and cozy things stems from a childhood filled with art materials, books, and boundless creativity. Inspired by my imaginary stories, I crafted characters that leaped off the pages.

Equipped with a degree in Graphic Design from the University of Estate of São Paulo and a Master's in Science from the University of São Paulo, I sought to blend education with fun for children across diverse fields. My expertise lies in collaborating with publishers and authors worldwide, bringing their projects to life through captivating illustrations and engaging designs.

With a focus on board books, activity books, and children's books, I specialize in crafting books that resonate with toddlers and young readers. I aspire to nurture a love of literature in children, just as I discovered it myself as a child.

Children’s Non-Fiction
Picture Books
  • Character Design Complete Course on ICS Art School Brazil
  • Picture Book illustration course on ICS Art School Brazil
  • Illustrating Children's Stories - Complete course on Domestika
  • Childrens illustrations for Editorial - Complete course on Domestika
  • Colorful animal illustration with Photoshop - complete course on Domestika
  • Creative Techniques for character design - complete course on Domestika
  • Atmospheric Scenes in Procreate: Paint with Color and Light - Complete Course on Domestika
  • Bachelor in Graphic Design - University of Estate of São Paulo (Brazil)
  • Masters in Applied Sciences - University of São Paulo (Brazil)

Work experience


Jan, 2021 — Present

I work with illustrations (books, activity books, board books, puzzles, board games, and more) and editorial design for children's markets. Most of my clients are independent authors around the world and publishers, like Porto Editora (from Portugal) and FyeN (from The Gambia).


Made with Reedsy
The Skunk Stunk

Palmer, Jean

Cover Design Illustration Book Interior Design
Scribble Pigs

Mireles, Amanda

Stella in the Kitchen

Nunes, Andrea F

Mariana has 3 reviews





Blake C.

Blake C.

Mar, 2024

I am blown away by Mariana! She was incredible. She was responsive, helpful, and so talented! I actually waited to do this project until she was available because I like her style so much and she did not disappoint. She guided me through this whole process, was patient while I figured my own ideas out, and delivered on something I can’t even believe is real now. She captured my vision perfectly...
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Mariana O.
Oh, Blake! Thank you so much! You were amazing throughout the project, and I feel incredibly fortunate to have been chosen by you for the book. I wish you a lot of success and all the best with the...
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L B.

L B.

Jan, 2024

I love working with Mariana. Her work is professional and she is always open to suggestions. She has a very positive attitude and has high expectation of her own work. She did extensive research based on the topic of my project on her own and it reflects her work behind the scenes in her illustrations. I really appreciate her attention to details and her support to my publishing journey. Highly...
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Mariana O.
Oh, Eva, thank you so much! It was a pleasure to work with you and bring this amazing book to life. Eva was always available to assist me, providing detailed materials to help me understand and rep...
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Jeff H.

Jeff H.

Oct, 2023

Mariana was great! Super upbeat and fun to collaborate with. She had many great suggestions but was always more than happy when I wanted to go in a different direction. She was very fast and in fact, was able to beat our deadline by a couple of weeks. I would definitely work with her again and if she wasn't available I would wait until she was! Her art was even better than I hoped it would be. ...
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Mariana O.
Oh, Jeff! Thank you so much! It was a pleasure to work with you on this amazing project and I wish you all the success! And hope we can work together again! Thank you!

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