Jakub Ryszard Kobalczyk

FREELANCE

Product Designer, Design System Valencia, VLC Mar 2020 – Present

● Delivered UI/UX solutions for 27 clients across mobile, web and wearable platforms, increasing average user retention by 12-20% through iterative design, usability testing, and continuous feedback loops.

● Conducted user research and prototyping in Figma, designing accessible, user-centered interfaces that reduced user error rates by 18-31% and improved task completion times by 15% in 83% of cases.

● Managed end-to-end design projects independently, consistently meeting deadlines across different time zones using tools like Slack, Zoom, and Notion, achieving a 96% client satisfaction rate.

VIKING CENTRO

Product Owner, Principal Product Designer Valencia, VLC Nov 2023 – Present

● Designed and implemented a scalable design system for a SaaS gym management platform, improving interface consistency across web and mobile apps and reducing design-development alignment time by 32%, using Figma and tools like Storybook or Dovetail.

● Led end-to-end UX/UI design for a client-facing mobile app and admin dashboard, including user research, wireframing, and high-fidelity prototyping, contributing to a 28% increase in user retention within three months post-launch.

● Increased class attendance by 25% and boosted service sales by 46% by applying data-driven UX improvements and launching targeted marketing campaigns, leveraging tools like Google Analytics and Hotjar.

● Improved accessibility compliance by 77%, ensuring designs met WCAG 2.1 standards through close collaboration with developers and product managers - cutting QA revision cycles by 32%.

LA ICREATIVA

UI & Visual Designer, Brander Valencia, VLC Feb 2020 – Dec 2020

● Designed an in-table food ordering system for a restaurant chain, integrating Stripe with SSL encryption and two-factor authentication: reducing transaction errors by 40% and boosting overall payment reliability.

● Optimized the payment flow through wireframes and interactive prototypes in Figma, resulting in 63% of customers switching to in-app payments and driving a 22% increase in revenue from digital orders.

● Collaborated with developers to implement fully responsive and accessible designs for web and mobile, ensuring accessibility compliance and improving mobile conversion rates by 17%.

CIPFP Ciutat de LʼAprenent

Higher Degree Professional Training in Design and Editing of Printed and Multimedia Publications

Relevant Coursework:

UX/UI Design, Mobile App Design; Research; Problem Solving; Web Design