Mac is available for hire
Hire MacMac Kozal
Verified Expert in Design
Designer
Location
Barcelona, Spain
Toptal 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.
Portfolio
Work Experience
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 tool mentioned above.
- Used feedback from 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 update their landing page to communicate their value proposition better and made a set of interactive diagrams that made it easier to convey that message.
- Collaborated with the 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 an advanced web-based utility tool for the company mentioned above that manages field data collection projects in remote and urban locations (data-heavy project).
- Created the design for the user interface and UX of the data input, data management, and presentation and oversaw the UI/UX of GIS data.
- Designed an advanced web-based tool that solves molecular reactions and chemical problems using multiscale methods to simulate a small, chemically important region or a larger, complex chemical environment.
- Designed the marketing webpage, technical documentation, logo, and 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, UX Analysis, User Research, User Flows, Product Design, Information Architecture (IA), Journey Mapping, WebApp, Low-fidelity Mockups, High-fidelity Mockups, UX Research, UX Architecture, Web App Design, Responsive Web Design (RWD), UX Audits, App Design, Branding, Complex Application User Interfaces (UI), Data Architecture, Design, Web UI, Web UX, Dashboards, eCommerce UI, eCommerce UX, eCommerce, Web UX Design, Web App UI, Dashboard Design, Personas, B2B, User Stories, Competitive Analysis, Content Management Systems (CMS), Management Systems, Product Consultant, Consulting, Jira, Enterprise SaaS, Enterprise Design, Web Design, Mobile Design, UX Principles, Design Leadership, Design Guidelines, Interaction Design (IxD), UX Wireframes, Style Guides, Best Practices in Design, Scheduling Tools, User Experience (UX), Web App UX, Analytical Dashboards, User Journeys, B2C, Business to Business to Consumer (B2B2C), B2B2C, Marketplaces, Collaboration, Enterprise, Leadership, Android, Mobile UX Design, Mobile UI Design, Commercial Real Estate, Residential Real Estate, Real Estate Development, User Testing, Feature Prioritization, Layout Design, Remote User Testing, WCAG 2, Workflow, Enterprise Application Design, Enterprise Systems, User Workflows, UI Maps, Interactive Charts, User Journey Maps, Component Libraries, Analytics, Design Strategy, Qualitative Research, Data Analytics, Customer Journeys, Product Growth, Mobile UI, SaaS, Responsive Web Apps, User Validation, Heuristic Evaluation, Usability, Heuristic Analysis
Product Designer
2023 - 2023
Intelligent Hotel Operations System Company
- Helped the client by designing a product that allows to design and operate building infrastructure systems so they can be net-zero (carbon neutrality).
- Collaborated with product managers and software developers in Agile development teams to gather and evaluate online platform user requirements,.
- Illustrated and presented design ideas using storyboards, sitemaps, and process flows.
- Designed and defended graphical user interface (GUI) elements conforming to best practices for style, fonts, colors, and images.
- Developed UI mockups and prototypes for the platform's appearance and user experience.
- Troubleshoot and identify UX problems such as intuitive operation and responsiveness.
- Ran design discovery and delivery phases for the design phase.
Technologies: Figma, App UX, Web UI, Web UX, UX Design, Product Design, Digital Product Design, Web App UX, Web App UI, Web App Design, Web Applications, 3D Architecture, Electric, Component Libraries, Analytics, Interaction Design (IxD), Key Performance Indicators (KPIs), Design Strategy, Qualitative Research, Quantitative Research, Data Analytics, Customer Journeys, Product Growth, Mobile Design, Mobile UI, SaaS, Leadership, Responsive Web Apps, User Validation, Heuristic Evaluation, Usability, Heuristic Analysis
Data Visualization Designer
2023 - 2023
Open Ocean UK LLP & Saïd Business School - University of Oxford
- Conceptualized and designed an interactive data visualization system and dashboards for a venture classification platform. It uses artificial intelligence to classify startups, building insight into businesses and their underlying technology.
- Worked on the design discovery and delivery phase, including data research, choosing the best plotting methodology, and interactive maps.
- Collaborated closely with data scientists and developers to ensure the solution was feasible to develop.
Technologies: Data Visualization, Web Design, Information Visualization, DataViz, Big Data, Interactive UX, Interactive UI, Financial UX, Maps, Geographic Information Systems, GIS, Interactive Charts, Charts, User Journey Maps, Enterprise Application Design, Enterprise Design, Enterprise Systems, User Workflows, Design Leadership, UI Maps, Component Libraries, Analytics, Interaction Design (IxD), Key Performance Indicators (KPIs), Design Strategy, Qualitative Research, Quantitative Research, Data Analytics, Customer Journeys, Database as a Service (DBaaS), Product Growth, Mobile Design, Mobile UI, SaaS, Leadership, Responsive Web Apps, User Validation, Heuristic Evaluation, Usability, Heuristic Analysis
Product Designer
2020 - 2023
Entos
- Designed from scratch an advanced web-based utility tool that calculates and compares molecules' properties, explores reaction pathways, measures bonds and angles, edits geometries, and exports images and videos.
- Handled the tool's design discovery and delivery phases.
- Delivered ideation sketches and explorations, workshops, user flows, wireframes, information architecture explorations, low- and high-fidelity prototypes, iterative updates design, motion design, documentation, design system, and webpage design.
Technologies: User Interface (UI), Responsive Web Design (RWD), User Experience (UX), UX Design, UI Design, Web App UX, Web App UI, High-fidelity Prototypes, Responsive Web Apps, 3D, UX Research, UX Architecture, Web App Design, UX Audits, Complex Application User Interfaces (UI), Data Architecture, Design, Web UI, Web UX, Web UX Design, Dashboards, Dashboard Design, Personas, B2B, User Stories, Medtech, Competitive Analysis, Content Management Systems (CMS), Management Systems, Product Consultant, Consulting, Jira, Web Design, UX Principles, Design Leadership, Design Guidelines, Interaction Design (IxD), UX Wireframes, Style Guides, Best Practices in Design, Figma, Analytical Dashboards, User Journeys, Collaboration, Leadership, Android, User Testing, Feature Prioritization, Layout Design, Remote User Testing, WCAG 2, Workflow, User Workflows, Big Data, Interactive Charts, User Journey Maps, Component Libraries, Analytics, Key Performance Indicators (KPIs), Design Strategy, Qualitative Research, Data Analytics, Database as a Service (DBaaS), Product Growth, Mobile UI, Heuristic Evaluation, Usability, Heuristic Analysis
Lead Product Designer
2020 - 2022
Mitel
- Led the design improvements of multiple service delivery portals that cross the hardware and software set up. I turned large, complex admin environments into easy-to-use yet functional design solutions.
- Worked collaboratively with stakeholders, domain experts, and partners while driving to a goal. I defined the service delivery design, user flows, and journeys.
- Contributed to the company road map and worked on quick wins, scoping out needs for longer-term strategies.
- Worked with different teams simultaneously on multiple enterprise-level UX experience projects in parallel: complex administration flows, very high-level UX, interaction design, order management system, shopping cart, etc.
- Handled billing-related experiences, dashboarding, workflow builders, CX admin tools, and app store design.
- Was responsible for the company design system. I collaborated with a dedicated development team and external specialists to ensure the system's quality.
- Worked on the PBX configuration portal and outlined the experiences that enable hardware set up through the software.
- Handled the redesign of the CC tool and worked closely with PLMs on various user experience improvements.
- Worked on the Mitel analytics program, defined the scope of the MVP from the user experience perspective, and embedded the external business intelligence tool (including making the working prototypes with the dummy data I prepared).
- Performed multiple studies and research exercises that led to product improvements.
Technologies: Product Design, User Experience (UX), 3D, Admin Panels, UX Workshops, Testing, Corporate Design, Multidisciplinary Design, UX Analysis, User Research, Wireframing, UX Design, UI Design, User Flows, Information Architecture (IA), Journey Mapping, User Interface (UI), Data Visualization, Digital Product Design, WebApp, Low-fidelity Mockups, High-fidelity Mockups, UX Research, UX Architecture, Web App Design, Responsive Web Design (RWD), UX Audits, Complex Application User Interfaces (UI), Data Architecture, Design Systems, Dashboards, eCommerce UI, eCommerce UX, eCommerce, Web UX Design, Web App UI, Dashboard Design, Personas, B2B, User Stories, Competitive Analysis, Content Management Systems (CMS), Management Systems, Product Consultant, Consulting, Jira, Enterprise SaaS, Enterprise Design, Web Design, Mobile Design, UX Principles, Design Leadership, Design Guidelines, Interaction Design (IxD), UX Wireframes, Style Guides, Best Practices in Design, Scheduling Tools, Web App UX, Figma, Analytical Dashboards, User Journeys, Key Performance Indicators (KPIs), B2C, B2B2C, Business to Business to Consumer (B2B2C), Marketplaces, Healthcare, Fintech, Collaboration, Enterprise, Leadership, Android, Mobile UX Design, Mobile UI Design, SaaS Design, User Testing, Feature Prioritization, Layout Design, Remote User Testing, WCAG 2, Workflow, Enterprise Application Design, Enterprise Systems, User Workflows, Big Data, UI Maps, Interactive Charts, User Journey Maps, Component Libraries, Analytics, Design Strategy, Qualitative Research, Quantitative Research, Data Analytics, Customer Journeys, Conversion Rate, Product Growth, Mobile UI, SaaS, Responsive Web Apps, User Validation, Heuristic Evaluation, Usability, Heuristic Analysis
UX/UI Designer
2020 - 2020
Byers Engineering Company
- Helped the client with the design of an advanced web-based utility tool that manages field data collection projects in both remote and urban locations.
- Assisted the client in making the tool for disconnected and connected data points in an easy-to-use, short lead time deployment scenario for locational accuracy and situational awareness.
- Worked on the discovery and delivery phases, wireframes, prototypes, user tests, and design documentation.
Technologies: Web App Design, Corporate Design, Web Applications, Web GIS, GIS, Geography, Maps, User Flows, User Testing, Information Design, Data Collection, Web Forms, Forms, Dashboard Design, Analytical Dashboards, Applications, Analytics, Management Systems, Event Coordination, Component Libraries, Key Performance Indicators (KPIs), Design Strategy, Qualitative Research, Quantitative Research, Data Analytics, Conversion Rate, Product Growth, Mobile Design, Mobile UI, SaaS, Responsive Web Apps, Heuristic Evaluation, Usability, Heuristic Analysis
UI/UX Designer
2020 - 2020
True Footage
- Conceptualized the design of a real estate web app for Mac that allows drawing floor plans.
- Prepared a library of building-related equipment assets that users can use in their floor plans.
- Adjusted the app to the new version of Apple's human interface guidelines.
Technologies: Web App Design, Web App UX, Web App UI, App UX, App UI, SaaS Design, User Testing, Feature Prioritization, Layout Design, WCAG 2, User Workflows, User Journey Maps, Component Libraries, Design Strategy, Qualitative Research, Product Growth, Mobile UI, Responsive Web Apps, Heuristic Evaluation, Usability, Heuristic Analysis
Product Designer
2018 - 2020
Starred.com
- Designed and framed the design for 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%.
- Worked on the UX platform and various UI improvements.
- Prepared and performed usability tests and conversations with users.
- Developed a feature prioritization methodology that helped us address problems better.
- Conceptualized and designed Starred Connect from scratch; It 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 achieve better, more actionable insights.
- Evangelized design-driven processes within the company.
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, UX Analysis, User Research, User Flows, Product Design, Information Architecture (IA), Journey Mapping, WebApp, Low-fidelity Mockups, High-fidelity Mockups, UX Research, UX Architecture, Web App Design, Responsive Web Design (RWD), UX Audits, Complex Application User Interfaces (UI), Data Architecture, Design, Web UI, Web UX, Dashboards, Web UX Design, Web App UI, Dashboard Design, Personas, B2B, User Stories, Competitive Analysis, Content Management Systems (CMS), Management Systems, Jira, Web Design, Mobile Design, UX Principles, Design Guidelines, UX Wireframes, Style Guides, Best Practices in Design, User Experience (UX), Web App UX, Analytical Dashboards, User Journeys, Key Performance Indicators (KPIs), B2C, Business to Business to Consumer (B2B2C), B2B2C, Marketplaces, Collaboration, Android, Mobile UX Design, Mobile UI Design, SaaS Design, User Testing, Feature Prioritization, Layout Design, Remote User Testing, Workflow, Enterprise Systems, User Workflows, Interactive Charts, User Journey Maps, Component Libraries, Design Strategy, Qualitative Research, Quantitative Research, Data Analytics, Customer Journeys, Conversion Rate, Product Growth, Mobile UI, SaaS, Responsive Web Apps, User Validation, Heuristic Evaluation, Usability, Heuristic Analysis
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 and remote developer who helped to build it.
- Designed and maintained the design and animation system.
- Prepared and managed the design and motion documentation.
- Experimented and developed new features and proposed improvements from user feedback.
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, UX Analysis, User Research, User Flows, Product Design, Information Architecture (IA), Journey Mapping, WebApp, Low-fidelity Mockups, High-fidelity Mockups, UX Research, UX Architecture, App Design, Data Architecture, Design, Web UI, Web UX, Dashboards, Web UX Design, Personas, User Stories, Competitive Analysis, Web Design, Mobile Design, UX Principles, Design Guidelines, UX Wireframes, Style Guides, Best Practices in Design, User Experience (UX), User Journeys, B2C, Collaboration, Android, Mobile UX Design, Mobile UI Design, User Testing, Feature Prioritization, Layout Design, User Workflows, Interactive Charts, User Journey Maps, Component Libraries, Qualitative Research, Quantitative Research, Customer Journeys, Product Growth, Mobile UI, Responsive Web Apps, Heuristic Evaluation, Usability, Heuristic Analysis
Product Designer
2019 - 2019
Suburbia
- Created the user experience for the product and landing pages.
- Designed and prototyped interactive charts and 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, UX Analysis, User Flows, Product Design, Information Architecture (IA), Low-fidelity Mockups, High-fidelity Mockups, UX Research, UX Architecture, Data Architecture, Design, Web UI, Web UX, eCommerce UI, eCommerce UX, eCommerce, Web UX Design, Personas, B2B, User Stories, Competitive Analysis, Product Consultant, Consulting, Web Design, UX Principles, Design Guidelines, UX Wireframes, Best Practices in Design, User Experience (UX), User Journeys, Marketplaces, Collaboration, User Testing, Feature Prioritization, Layout Design, Adobe Photoshop, Enterprise Application Design, User Workflows, Interactive Charts, User Journey Maps, Component Libraries, Quantitative Research, Customer Journeys, Product Growth, Mobile Design, Mobile UI, Responsive Web Apps, Heuristic Evaluation, Usability, Heuristic Analysis
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 the dark UI.
- Prepared the documentation, experimented with, and developed new features.
- Supervised the project and managed a remote developer.
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, UX Analysis, User Flows, Product Design, Information Architecture (IA), WebApp, Low-fidelity Mockups, High-fidelity Mockups, UX Research, UX Architecture, Web App Design, Responsive Web Design (RWD), Data Architecture, Design, Web UI, Web UX, Web UX Design, Personas, User Stories, Web Design, Mobile Design, UX Principles, Design Guidelines, UX Wireframes, Style Guides, Best Practices in Design, User Experience (UX), Web App UX, User Journeys, B2C, Collaboration, Android, User Testing, Feature Prioritization, Layout Design, User Workflows, User Journey Maps, Component Libraries, Qualitative Research, Quantitative Research, Customer Journeys, Product Growth, Mobile UI, Responsive Web Apps, Heuristic Evaluation, Usability, Heuristic Analysis
Co-founder | UX/Product Designer
2017 - 2017
Coypu
- Conceptualized and designed an ext-editor-like weekly planner.
- Prepared comprehensive documentation, overseeing and scoping the project for its MVP stage.
- 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, UX Analysis, User Flows, Product Design, WebApp, Low-fidelity Mockups, High-fidelity Mockups, UX Research, UX Architecture, Web App Design, Responsive Web Design (RWD), App Design, Design, Web UI, Web UX, Web UX Design, Personas, User Stories, Web Design, Mobile Design, UX Principles, Design Guidelines, UX Wireframes, Style Guides, Best Practices in Design, User Experience (UX), Web App UX, User Journeys, B2C, Collaboration, Mobile UX Design, Mobile UI Design, User Testing, Feature Prioritization, Layout Design, User Workflows, User Journey Maps, Component Libraries, Qualitative Research, Quantitative Research, Customer Journeys, Product Growth, Mobile UI, Responsive Web Apps, Heuristic Evaluation, Usability, Heuristic Analysis
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 and created and implemented usability tests.
- Prepared the documentation and 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 over 200 points of interest (POIs).
- Designed the data organization structure, made the illustrations for the landing page, and 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, UX Analysis, User Flows, Product Design, Information Architecture (IA), Journey Mapping, WebApp, Low-fidelity Mockups, High-fidelity Mockups, UX Research, UX Architecture, App Design, Data Architecture, Design, Web UI, Web UX, Web UX Design, Personas, User Stories, Web Design, Mobile Design, UX Principles, Design Guidelines, UX Wireframes, Style Guides, Best Practices in Design, User Experience (UX), User Journeys, B2C, Collaboration, Android, Mobile UX Design, Mobile UI Design, User Testing, Feature Prioritization, Layout Design, User Workflows, UI Maps, Interactive Charts, User Journey Maps, Component Libraries, Qualitative Research, Quantitative Research, Data Analytics, Customer Journeys, Product Growth, Mobile UI, Responsive Web Apps, Heuristic Evaluation, Usability, Heuristic Analysis
Architectural Designer
2007 - 2017
Multiple Companies
- Acted as an architect and architectural designer for multiple companies in different countries.
- Advised clients in the whole spectrum, from interiors to urban design, based on solid knowledge of engineering, construction, and regulations.
- Drove design explorations and crafted comprehensive design documentation for multiple projects.
Technologies: Data Visualization, Wireframing, Visual Design, Computer Automation Design (CAD), Adobe Suite, 3D, UX Analysis, Complex Application User Interfaces (UI), Design, Web UI, Design Guidelines, Architecture, 3D Architecture, User Journeys, Collaboration, Enterprise, Commercial Real Estate, Residential Real Estate, Real Estate Development, Feature Prioritization, Layout Design, Adobe Photoshop, User Workflows, User Journey Maps, Qualitative Research, Heuristic Evaluation, Usability, Heuristic Analysis, Architectural Design
Co-founder | UX/Product Designer
2016 - 2016
Jottings
- Conceptualized and designed a real-time collaborative text editor in Markdown. Prepared the documentation, supervised the project, scoped it for MVP, and performed user testings.
- Handled both the discovery and delivery phases of the project.
- Experimented and developed new features for the project roadmap.
Technologies: Digital Product Design, UI Design, UX Design, User Interface (UI), Wireframing, Visual Design, Usability Testing, Sketch, UX Analysis, User Flows, Product Design, WebApp, Low-fidelity Mockups, High-fidelity Mockups, UX Research, UX Architecture, Web App Design, Responsive Web Design (RWD), Design, Web UI, Web UX, Web UX Design, Web App UI, User Stories, Web Design, UX Principles, Design Guidelines, UX Wireframes, Best Practices in Design, User Experience (UX), Web App UX, User Journeys, B2C, Collaboration, User Testing, Feature Prioritization, Layout Design, User Workflows, User Journey Maps, Component Libraries, Qualitative Research, Quantitative Research, Customer Journeys, Product Growth, Mobile Design, Mobile UI, Responsive Web Apps, Heuristic Evaluation, Usability, Heuristic Analysis
Co-founder | UX/Product Designer
2016 - 2016
Checkers
- Conceptualized and designed Checkers for iMessage: a board game for iOS 10 iMessage and Native iOS app, one of the first iMessage apps on the market promoted by Apple with over 140,000 users.
- Managed the project and a remote developer. Prepared the documentation.
- 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, UX Analysis, User Flows, Product Design, WebApp, Low-fidelity Mockups, High-fidelity Mockups, UX Research, UX Architecture, App Design, Design, Web UI, Web UX, Web UX Design, User Stories, Web Design, Mobile Design, UX Principles, Design Guidelines, UX Wireframes, Best Practices in Design, User Experience (UX), User Journeys, B2C, Collaboration, Mobile UX Design, Mobile UI Design, User Testing, Feature Prioritization, Layout Design, User Workflows, User Journey Maps, Component Libraries, Qualitative Research, Quantitative Research, Customer Journeys, Product Growth, Mobile UI, Responsive Web Apps, Heuristic Evaluation, Usability, Heuristic Analysis
Education
2004 - 2009
Master of Architecture Degree in Architecture and Urban Planning
Lodz University of Technology - Łódź, Poland