✦ Available for Q4 25 ✦
Work with one of the most experienced Designer
I partner with ambitious founders, startups, and scale-ups as a fractional CDO and strategic UX expert - delivering clarity, structure, and impact to your product journey.
Let's Talk →Design Services for Next-Level Impact
I merge creativity with precision to craft design that elevate your brand and streamline your workflows. With a foundation in scalable, data-driven components and years of UX/UI expertise, I empower businesses to transform fragmented efforts into cohesive, impactful digital ecosystems.
I work with world's leading companies
My Mission
My mission is to revolutionize how teams approach design and development by providing a unified framework that accelerates innovation, strengthens brand consistency, and enhances collaboration across all stakeholders.
Let's talk →17+
Years on the market
17+ years on the market delivering design services that revolutionize user experiences and accelerate business growth."
200%
200% Growth in Client ROI
My design systems aren’t just tools, they’re catalysts for exponential growth. Over the past two years, I have enabled clients to achieve a 200% increase in ROI by delivering consistent, high-quality, and data-driven solutions.
10+
Data-Driven Design Systems
I believe in actionable insights. By leveraging analytics, I craft data-driven design systems that turn complex datasets into intuitive interfaces, helping brands make informed decisions with confidence."
5+
Global Reach
From startups to enterprises, I have partnered with forward-thinking companies across 5+ continents, unifying diverse brands under cohesive, impactful identities that resonate across markets.
40%
Efficiency and Performance
My approach optimizes workflows, saving up to 40% in development and design time. By focusing on performance and streamlined processes, I help teams achieve more, faster—without compromising quality.
500+
Successful Projects
With over 500 successful projects delivered, I have empowered brands to launch innovative digital products that inspire users, accelerate growth, and push creative boundaries in their industries.
Milestones
My journey was defined by a passion for innovation, a commitment to excellence, and a drive to create meaningful impact. From crafting user experiences for startups to leading the development of large-scale design systems, each milestone represents a step forward in mastering the art of design and collaboration.
Let's talk →2014
I started working with startups to craft intuitive user experiences and scalable product strategies.
2016
I led design teams in tech companies, focusing on the development of cohesive design systems and improving collaboration between design and development teams.
2018
Designed and implemented the first complex design system for Synerise, setting a benchmark for scalable and future-proof solutions.
2020
I developed and designed 3 complex design systems for Fin-tech and Data-driven companies
2025
Launched my personal brand to deliver data-driven, cutting-edge design services, combining years of experience with a mission to help businesses thrive and scale.
Let's create your Product
together!
My expertise is built on a foundation of years of hands-on experience driving impactful design solutions across industries. As the founder I brings over a decade of leadership in product design, having spearheaded design initiatives at leading Martech companies and collaborated with global brands in fintech, enterprise, and tech startups.
Let's talk →
Kosma Lenar
Results That Speak for Themselves
Achieving measurable impact through tailored UX & Product Design strategies.
Accelerated time-to-market by 30%
"Working with on the Colloid Design System was a game-changer. Their expertise in scalable design and seamless integration helped us unify our brand and accelerate product delivery"
Piotr Nikel
Chief Product Officer - Synerise
20% Increase in Product Efficiency
Kosma's leadership and strategic vision transformed our product design approach, significantly enhancing our SaaS offerings. His ability to mentor and inspire a high-performing design team fostered a culture of innovation, directly contributing to measurable growth and success at SALESmanago.
Piotr Uryga
Chief Technical Officer - SALESManago
45% Faster Prototype-to-Launch Cycle
Kosma's expertise in complex design systems and rapid prototyping has been invaluable to our success at GetBeans. His seamless collaboration with developers ensured efficient workflows and exceptional outcomes. Highly recommended!"
Wojciech Szkutnik
CEO - getBeans