I’m Lucas Kowalski, a UX/UI and Product Designer based in Rotterdam, The Netherlands, with six years of experience crafting data-driven designs that boost conversions and business growth. I’m driven by understanding user needs through a fascination with logic, behavioral patterns and a refined taste for visual design. I have proven expertise in end-to-end design processes, leading projects and teams in fast-paced environments, and collaborating with stakeholders and engineers to ship impactful work. I excel at leading end-to-end design processes, collaborating across Product, Engineering, Marketing and Data teams, and sharing knowledge to help teams thrive in fast-paced environments. I’m passionate about designing systems, communicating a clear message, and delivering tangible results that users love.…

Lukasz Kowalski

I’m Lucas Kowalski, a UX/UI and Product Designer based in Rotterdam, The Netherlands, with six years of experience crafting data-driven designs that boost conversions and business growth. I’m driven by understanding user needs through a fascination with logic, behavioral patterns and a refined taste for visual design. I have proven expertise in end-to-end design processes, leading projects and teams in fast-paced environments, and collaborating with stakeholders and engineers to ship impactful work. I excel at leading end-to-end design processes, collaborating across Product, Engineering, Marketing and Data teams, and sharing knowledge to help teams thrive in fast-paced environments. I’m passionate about designing systems, communicating a clear message, and delivering tangible results that users love.…

Available to hire

I’m Lucas Kowalski, a UX/UI and Product Designer based in Rotterdam, The Netherlands, with six years of experience crafting data-driven designs that boost conversions and business growth. I’m driven by understanding user needs through a fascination with logic, behavioral patterns and a refined taste for visual design. I have proven expertise in end-to-end design processes, leading projects and teams in fast-paced environments, and collaborating with stakeholders and engineers to ship impactful work.

I excel at leading end-to-end design processes, collaborating across Product, Engineering, Marketing and Data teams, and sharing knowledge to help teams thrive in fast-paced environments. I’m passionate about designing systems, communicating a clear message, and delivering tangible results that users love.

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Skills

Experience Level

Language

Polish
Fluent
English
Fluent
Dutch
Beginner
German
Beginner
French
Beginner

Work Experience

UX Lead at ECP Agency
February 1, 2025 - Present
Creative Direction, Product Strategy and UX/UI Design for multiple products and brands. Improved internal design processes, boosting productivity, speed, and cross-team communication.
Senior UX Designer at Freelancing
March 1, 2025 - October 10, 2025
Designed UX/UI solutions for clients across Sustainable Energy, SaaS ERP and SFA systems, and E-Commerce. Delivered research and analytics reports, UX audits, user flows, use cases, wireframes, ERP dashboards, web designs and webshops.
Senior UX Designer at BYQ Studio
March 2, 2025 - October 10, 2025
Designed, developed and led 100+ web flow templates for SaaS, Design, AI, Health care, Real estate and consulting industries. Spearheaded 10+ template design projects from ideation to market launch. Established close cooperation between design, marketing, development and data teams.
Medior UX/UI Designer at Not Selling Liquid
February 1, 2024 - October 10, 2025
Created 15+ successful e-commerce websites (Shopify 2.0), generating millions in revenue, averaging a 60% improvement in conversion rate, up to 100% increase in total sales, 30–50% faster mobile and 40–80% faster desktop page speed leading to higher user retention, 20% higher order value and more. Led end-to-end design processes from client briefing to delivery, including research, strategy, prototyping, client presentations, testing, and iterations.
UX Designer at Polette
July 1, 2020 - October 10, 2025
Designed and launched a mobile app for iOS and Android featuring AR technology, achieving 10k+ downloads and a 4.7/5 rating on the App Store. Maintained strong collaboration between design, engineering and marketing teams.
UX Design Intern at Intive
February 1, 2019 - October 10, 2025
Created multiple iOS, Android and desktop application designs for corporations and smaller businesses. Led responsive web design projects and gained experience in end-to-end UX processes.
UX Lead at ECP Agency
February 1, 2025 - Present
Creative Direction, Product Strategy and UX/UI Design for multiple products and brands; improved internal design processes, increasing productivity and inter-team communication.
Senior UX Designer at Freelancing
March 1, 2025 - October 10, 2025
Created UX/UI solutions for clients in various industries such as Sustainable Energy, SaaS ERP and SaaS; delivered Research and Analytics reports, UX Audits, User Flows, Use Cases, Wireframes, ERP Dashboards, Web designs and Webshops.
Senior UX Designer at BYQ Studio
March 1, 2025 - October 10, 2025
Designed, developed and sold 100+ Web flow templates, dedicated for SaaS, Design, AI, Health care, Real estate and Consulting industries; spearheaded 10+ template design projects from idea to market launch.
Medior UX / UI Designer at Not Selling Liquid
February 1, 2024 - October 10, 2025
Created 15+ successful E-Commerce websites (Shopify 2.0), generating millions in total revenue, achieving an average 60% improvement in conversion rate, up to 100% increase in total sales, 30-50% mobile and 40-80% faster desktop site speed leading to higher user retention, and 20% higher order value. Led end-to-end design processes for each project and launched websites across European, UK and US markets; designed multiple B2B and B2C apps such as Data Visualization and Analytics dashboards.
UX Designer at Polette
July 1, 2020 - October 10, 2025
Designed and launched a mobile app for iOS and Android featuring AR technology, achieving 10k+ downloads and a 4.7/5 rating on the Apple Store.
UX Design Intern at Intive
February 1, 2019 - October 10, 2025
Created multiple iOS, Android and desktop application designs for corporations and smaller businesses; led the creation of responsive web design projects and gained experience in end-to-end UX processes.
UX Lead at ECP Agency
February 1, 2025 - Present
Creative Direction, Product Strategy and UX/UI Design for multiple products and brands. Helped in improving and restructuring internal design processes, enhancing productivity, speed and internal communication between teams. Created and updated design systems alongside new functionalities and redesigns for E-Commerce brands.
Senior UX Designer at Freelancing
March 1, 2025 - October 10, 2025
Created UX/UI solutions for clients in various industries such as Sustainable Energy, SaaS ERP and SFA Systems, and E-Commerce among others. Delivered Research and Analytics reports, UX Audits, User flows, Use cases, Wireframes, ERP Dashboards, Web designs and Webshops.
Senior UX Designer at BYQ Studio
March 1, 2025 - October 10, 2025
Designed, developed and sold 100+ Web flow templates, dedicated for SaaS, Design, AI, Health care, Real estate and Consulting industries. Spearheaded 10+ template design projects from ideation to market launch. Established great collaboration between internal and external Design, Marketing, Development and Data teams.
Medior UX / UI Designer at Not Selling Liquid
February 1, 2024 - October 10, 2025
Created 15+ successful E-Commerce websites (Shopify 2.0), generating millions in total revenue, on average 60% improvement in conversion rate, up to 100% increase in total sales, 30-50% mobile and 40-80% faster desktop site speed leading to higher user retention, 20% higher order value, and more. Led the entire end-to-end design process for each project: client briefing, research, analysis, strategy, design, prototyping, client presentations, development briefings, testing, iterations and improvements.
UX Designer at Polette
July 1, 2020 - October 10, 2025
Designed and launched a mobile app for iOS and Android featuring AR technology, achieving 10k+ downloads and a 4.7/5 rating on the Apple Store. Maintained great cooperation between design, engineering and marketing teams.
UX Design Intern at Intive
February 1, 2019 - October 10, 2025
Created multiple iOS and Android and desktop application designs for corporations and smaller businesses. Spearheaded creation of responsive web design projects and gained experience in end-to-end UX processes.

Education

Bachelor of Science in UX Design at The Hague University of Applied Sciences
January 1, 2017 - January 1, 2020
ICT Engineering at VIA University College, Denmark
January 1, 2016 - January 1, 2017
Bachelor of Science in UX Design at The Hague University of Applied Sciences, The Netherlands
January 1, 2017 - January 1, 2020
Diploma in ICT Engineering at VIA University College, Denmark
January 1, 2016 - January 1, 2017
Bachelor of Science in UX Design at The Hague University of Applied Sciences, The Netherlands
January 1, 2017 - January 1, 2020
ICT Engineering at VIA University College, Denmark
January 1, 2016 - January 1, 2017

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Retail, Professional Services, Media & Entertainment, Education, Healthcare, Real Estate & Construction

Skills

Experience Level