Mac Kozal

Designer in Barcelona, Spain

Member since December 23, 2019

Along with co-founding six mobile apps, Mac is a product/UX designer with 14 years of design experience and broad architectural background. He combines the processes of those two specialties in a daily routine to create inspired and innovative products. Mac specializes in planning, conceptualizing, and designing clean, scalable, functional products, and experiences that leave a positive impact on people and solve business problems.

Mac is now available for hire

Hire Mac

Portfolio

Digital Design

Field Data Collection Tool
- UX Design
- UI Design
- Material Design
- Digital Product Design
- Design Systems
- Data
- Information Architecture (IA)
- Prototyping
- Presentation Design
- Low-fidelity Mockups
- Low-fidelity Prototypes
- High-fidelity Mockups
- High-fidelity Prototypes
- Web App UX
- Web App UI
- Web App Design
- WebApp
- Data Visualization
- Data-informed Visual Design
- Software
- Mockups
- Flowcharts
- User Flows
- Figma
- Ideation
- Documentation
- UX Documentation
- System Design
- Geography
- Geographic Information Systems
- GIS
- Web GIS
- Forms
- Form Design
- Wireframing
- User Interface (UI)
Starred People Experience Overview
- Dashboards
- SaaS
- UX Design
- Digital Product Design
- UI Design
- Design Systems
- Charts
- Information Architecture (IA)
- Analytics
- SaaS Design
- Usability Testing
- Data
- User Metrics
- Prototyping
- Presentation Design
- WebApp
- Data Visualization
- Data-informed Visual Design
- Software
- Low-fidelity Mockups
- Low-fidelity Prototypes
- High-fidelity Mockups
- High-fidelity Prototypes
- Video Presentations
- Flowcharts
- User Flows
- Figma
- Mixpanel
- Recruitment
- Human Resources (HR)
- Surveys
- Ideation
- Documentation
- System Design
- Wireframing
- User Interface (UI)
UI Samples
- DataViz
- Product Design
- Dashboards
- User Interface (UI)
- Design
- Charts
- Mobile
- Web
- User Experience (UX)
- Wireframing
- Data Visualization
- UX Design
Mood Tracker
- iOS
- Android
- UX Design
- UI Design
- Digital Product Design
- Emojis & Emoticons
- Psychology & Mental Health
- Charts
- Data
- Emotional Design
- Microinteractions
- Dark UIs
- Apps
- Prototyping
- Health & Wellness
- Low-fidelity Mockups
- Low-fidelity Prototypes
- High-fidelity Mockups
- High-fidelity Prototypes
- User Flows
- UX Flows
- Research
- Ideation
- Documentation
- Design Systems
- Wireframing
- User Interface (UI)
- Data Visualization
Starred | Respondent Feedback Form
- SaaS
- UX Design
- UI Design
- Digital Product Design
- Design Systems
- Usability Testing
- User Metrics
- Metrics
- Surveys
- Survey Design
- Microinteractions
- WebApp
- Mixpanel
- Corporate
- Analytics
- Information Architecture (IA)
- SaaS Design
- Prototyping
- Low-fidelity Mockups
- Low-fidelity Prototypes
- High-fidelity Mockups
- High-fidelity Prototypes
- Flowcharts
- User Flows
- Figma
- Sketch
- UsabilityHub
- Maze
- Documentation
- Presentation Design
- Recruiting
- Human Resources (HR)
- Customer Service
- Surveying
- Online Surveys
- User Surveys
- Ideation
- UX Documentation
- Design Documentation
- Research
- User Interviews
- Concept Testing
- User Preferences
- Remote Usability Testing
- Feature Prioritization
- Heatmaps
- Quality Assurance (QA)
- UX Assessment
- Form Design
- Wireframing
- User Interface (UI)
- Data Visualization
Polestar Design System
- UX Design
- UI Design
- Digital Product Design
- Design Systems
- SaaS
- SaaS Design
- Information Architecture (IA)
- Analytics
- Prototyping
- Ideation
- Research
- Documentation
- UX Documentation
- Motion Design
- Mixpanel
- Figma
- Presentation Design
- Heatmaps
- Quality Assurance (QA)
- UX Assessment
- User Testing
- Flowcharts
- Task Flows
- User Flows
- UX Wireflows
- Component Libraries
- UI Components
- Feature Prioritization
- Wireframing
- User Interface (UI)
Echotags
- iOS
- UX Design
- UI Design
- Digital Product Design
- Mobile
- Audio Montage
- Hand-drawn Illustrations
- Vector Art
- Information Architecture (IA)
- Content Marketing
- Content Creation
- Newsletter Design
- User Testing
- Mobile GPS
- Geolocation Detection
- Geolocation
- Prototyping
- UX Documentation
- Low-fidelity Mockups
- Low-fidelity Prototypes
- High-fidelity Mockups
- High-fidelity Prototypes
- High-speed Design
- Flowcharts
- User Flows
- User Personas
- Personas
- Sketch
- Tourism
- Documentation
- Quality Assurance (QA)
- Ideation
- Illustration
- Presentation Design
- Landing Page Design
- Newsletters
- Wireframing
- User Interface (UI)
Starred Settings Pages
- UX Design
- UI Design
- Digital Product Design
- User Preferences
- Design Systems
- Analytics
- SaaS
- SaaS Design
- User Metrics
- Usability Testing
- Prototyping
- Low-fidelity Mockups
- Low-fidelity Prototypes
- High-fidelity Mockups
- High-fidelity Prototypes
- Flowcharts
- User Flows
- User Feedback
- Figma
- Mixpanel
- Heatmaps
- Recruitment
- Recruiting
- HR Tools
- Human Resources (HR)
- Surveys
- Ideation
- Documentation
- UX Documentation
- User Permissions
- User Profiles
- Wireframing
- User Interface (UI)
- Data Visualization
Illustrations
- Illustration
- Line Drawing
- Pencil Drawing
- Hand Drawing
- Digital Drawing
- Sketch
- Procreate
- Visual Design
- Wireframing

Employment

Product/UX Designer
2019 - PRESENT
Freelance Projects
- Designed a tool that helps you understand and improve your company's entire people's experience.
- Conducted multiple iterations and user tests for the above-mentioned tool.
- Used the feedback from the user testing and multiple iterations and chose the best solution to make an overview homepage with a top-level interactive chart with filterable information, benchmark data, and real insights.
- Worked with an alternative data provider offering European point-of-sale transaction data. The company gathers non-personal data from new or hard-to-access sources, combining vast amounts of information into fast and reliable intelligence.
- Helped the alternative data provider to update their landing page to communicate their value proposition in a better way and made a set of interactive diagrams that make it easier to convey that message.
- Collaborated with technical services company in the telecommunications and utility industries that has 1,000 employees providing outside and inside plant design, planning, project management, inspection, RBOCs, ILECs, CLECs, IXCs, and so on.
- Designed for the above-mentioned company an advanced web-based utility tool that manages field data collection projects in both remote and urban locations for them (data-heavy project).
- Created the design for the user interface and UX of the data input, data management, and presentation and oversaw the UX/UI of GIS data.
- Designed an advanced web-based tool that provides assistance in solving chemical problems on molecular reactions using multiscale methods for simulation of a small, chemically important region or in a larger, complex chemical environment.
- Designed the marketing webpage, technical documentation, logo, and some branding elements.
Technologies: Digital Product Design, UI Design, UX Design, User Interface (UI), Data Visualization, Wireframing, Visual Design, Design Documentation, Prototyping, Ideation, Strategy, Usability Testing, Design Systems, Figma
Product Designer
2018 - 2020
Starred.com
- Designed and framed the design to the development process.
- Constructed and maintained a scalable design system: Polestar.
- Built the data-informed culture within the organization by implementing tools like Mixpanel and Hotjar.
- Applied UX methodologies to a survey that improved the completion rate by 51-95%.
- Created platfrom UX and UI improvements.
- Prepared and performed usability testings.
- Developed feature prioritization methodology that helped us addressing problems better.
- Conceptualized and designed Starred Connect from scratch; Starred Connect is part of the platform that allows building integrations with external apps without code knowledge. The average time to integrate with other platforms decreased from days to minutes.
- Designed Template Gallery and Insights Gallery—tools that allow our users to improve the UX for the respondent and get better, actionable insights.
- Evangelized design-driven processes within the company.
- Designed platform onboarding improvements and proposed relevant metrics to measure.
- Conducted design sprints.
- Performed design audits and usability heuristics.
- Led design projects.
- Strategized, conceptualized, designed, and tested the whole people experience workflow, that included complex dashboards and wizard-like forms.
- Worked closely with the head of product on prioritizing and conceptualizing the product strategy.
Technologies: Digital Product Design, UI Design, UX Design, User Interface (UI), Data Visualization, Wireframing, Visual Design, Usability Testing, Google Analytics, Lucidchart, Maze, Google, Marvel, Flinto, ProtoPie, Atomic Design, Proto.io, Design Sprints, Design Systems, Adobe Suite, UsabilityHub, InVision, Mixpanel, Abstracts, Sketch, Figma
Co-founder | UX/Product Designer
2019 - 2019
Mood Tracker
- Conceptualized and designed the mood tracker iOS/Android app; it was developed using React Native, Expo, and TypeScript.
- Managed the project.
- Designed and maintained the design system.
- Prepared the documentation.
- Managed a remote developer.
- Designed the animation system.
- Experimented and developed new features.
Technologies: Digital Product Design, UI Design, UX Design, User Interface (UI), Data Visualization, Wireframing, Visual Design, Flinto, ProtoPie, Atomic.io, Usability Testing, Design Systems, Figma
Product Designer
2019 - 2019
Suburbia
- Created the user experience for the product page and landing page.
- Designed and prototyped the interactive diagrams.
- Developed the strategy for iterative future changes for the landing page.
Technologies: Digital Product Design, UI Design, UX Design, User Interface (UI), Data Visualization, Wireframing, Visual Design, Figma
Co-founder | UX/Product Designer
2018 - 2018
Games Tracker
- Conceptualized and designed an online tool for tracking your computer games history.
- Designed and maintained the design system for dark UI.
- Prepared the documentation.
- Supervised the project.
- Managed a remote developer.
- Experimented and developed new features.
Technologies: Digital Product Design, UI Design, UX Design, User Interface (UI), Data Visualization, Wireframing, Visual Design, Flinto, ProtoPie, Atomic.io, Usability Testing, Design Systems, Figma
Co-founder | UX/Product Designer
2017 - 2017
Coypu
- Conceptualized and designed an ext-editor-like weekly planner.
- Prepared the documentation.
- Oversaw the project and scoped it for MVP.
- Managed a remote developer.
- Performed user testings.
- Experimented and developed new features.
Technologies: Digital Product Design, UI Design, UX Design, User Interface (UI), Wireframing, Visual Design, Usability Testing, Sketch
Co-founder | UX/Product Designer | Content Creator
2016 - 2017
Echotags
- Conceptualized and designed hands-free: an offline audio guide to Amsterdam app (native iOS).
- Prepared the market research.
- Created and implemented usability testings.
- Prepared the documentation.
- Supervised the project.
- Managed a remote developer.
- Performed usability heuristics and user testings.
- Experimented and developed new features.
- Prepared the content and organized voice recordings for more than 200 POIs.
- Designed the data organization structure.
- Made the illustrations for the landing page.
- Prepared a comic-style newsletter for the users.
Technologies: Digital Product Design, UI Design, UX Design, User Interface (UI), Data Visualization, Wireframing, Visual Design, Google, Adobe Suite, Usability Testing, Sketch
Architectural Designer
2007 - 2017
Multiple Companies
- Worked as an architect for multiple companies located in different countries.
- Used my knowledge to design and advise clients in the whole spectrum, from interiors to urban design based on solid knowledge of engineering, construction, and regulations.
Technologies: User Interface (UI), Data Visualization, Wireframing, Visual Design, Computer Automation Design (CAD), Adobe Suite, 3D
Co-founder | UX/Product Designer
2016 - 2016
Jottings
- Conceptualized and designed real-time collaborative text editor in Markdown.
- Prepared the documentation.
- Supervised the project and scoped it for MVP.
- Managed a remote developer.
- Performed user testings.
- Experimented and developed new features.
Technologies: Digital Product Design, UI Design, UX Design, User Interface (UI), Wireframing, Visual Design, Usability Testing, Sketch
Co-founder | UX/Product Designer
2016 - 2016
Checkers
- Conceptualized and designed Checkers for iMessage: a board game for iOS10 iMessage and Native iOS app. One of the first iMessage apps on the market promoted by Apple with over 140,000 users.
- Prepared the documentation.
- Managed the project and a remote developer.
- Performed usability heuristics and user testings.
- Experimented and developed new features.
Technologies: Digital Product Design, UI Design, UX Design, User Interface (UI), Wireframing, Visual Design, Usability Testing, Sketch

Education

Master of Architecture Degree in Architecture and Urban Planning
2004 - 2009
Lodz University of Technology - Łódź, Poland

Experience

Ideation12 years
User Interface (UI)5 years
Web Design4 years
User Experience (UX)4 years
Digital Product Design4 years
User Research4 years
User Testing4 years
Design Systems2 years

Location

To view more profiles

Join Toptal

Share it with others

Designer in Barcelona, Spain

Portfolio

Employment

Product/UX Designer

Product Designer

Co-founder | UX/Product Designer

Product Designer

Co-founder | UX/Product Designer

Co-founder | UX/Product Designer

Co-founder | UX/Product Designer | Content Creator

Architectural Designer

Co-founder | UX/Product Designer

Co-founder | UX/Product Designer

Education

Experience

Location