About Us:

The greatest magic is love.

Everything began from it.
From love for art and creation.
From the love we carried for one another.

It was our fuel, our foundation, and our light as we step by step built something greater than ourselves — a brand that today supports artists around the world to grow and succeed.

In every detail, there is an intention to share that same strength.
That is why every product carries more than form — it carries the energy of the love from which it was created.

Why Choose Us:


KOSTKA Professional Nail System (KNS) is a brand dedicated to high safety standards.

The brand is registered within the CPNP system and fully compliant with current EU cosmetic regulations. The Responsible Person for the EU market is CE-Way, which supervises and maintains the complete regulatory documentation in accordance with EU legislation. The formulations are 100% vegan and cruelty free. All products are developed without TPO and without CI 77820 (Silver) pigments. Approximately 80% of the portfolio is formulated without HEMA and Di-HEMA ingredients, and all products that do not contain these components are clearly marked in their descriptions.

KNS represents a fusion of aesthetics, regulatory responsibility, and the highest professional standards.

Kostka Bojana

Bojana Kostka is the founder and creative vision behind the KOSTKA Professional Nail System brand.

With more than two decades of international experience, she has built a reputation as an educator, judge, and author of innovative extreme nail forms recognized within the professional industry. Her expertise is not based solely on technique, but on a deep understanding of construction, balance, and aesthetics.

KNS was created from the vision that form can be art, and precision — a way of thinking. I believe that every woman who works with our materials is not just building a nail, but building her signature, her courage, and her strength.