Denis is available for hire
Hire DenisDenis Lesak
Verified Expert in Design
Designer
Burbank, CA, United States
Toptal member since September 30, 2019
Bio
Denis is a senior product designer with 11 years years of experience helping teams simplify complex enterprise products, developer platforms, and AI-powered workflows. He has led design at Meta, Disney, Ticketmaster, and ServiceTitan, turning technical systems into intuitive, scalable experiences. Denis brings a rare combination of systems thinking, design craft, and rapid AI-assisted execution.
Portfolio
Disney Design System
Material DesignDesign SystemsProduct DesignUX DesignUI DesignWorkflow Analysis
Experience
- B2B - 11 years
- Product Design - 10 years
- Enterprise SaaS - 7 years
- UI Design - 7 years
- User Journeys - 6 years
- Design Systems - 4 years
- AI-powered Product Design - 1 year
- Claude - 1 year
Tools
- Claude
Work Experience
Senior Product Designer
2020 - 2025
Meta
- Designed and launched Netflix in VR headset Browser, achieving 600,000+ MAU and exceeding usage goals by 20%.
- Drove the cross-functional delivery of VR headset Travel Mode, increasing headset retention by 14%.
- Redesigned Meta Quest's developer publishing platform, reducing Developer Relations support tickets by 62% while increasing app release velocity by 8%.
- Spearheaded Quest's first cross-device for the VR headset division's password import feature, decreasing churn and increasing time-to-fun.
- Redesigned the Meta Quest developer documentation experience, improving developer satisfaction and accelerating time to market.
- Led a cross-functional design sprint that shaped product strategy and informed 2025 investment priorities.
Technologies: Figma, Design Systems, User Interface (UI), User Research, User Experience (UX), Mobile, User Journey Maps, Product Design, Usability Testing, Data Visualization, Visual Design, Prototyping, Responsive Design, Mobile UX, User Journeys, Enterprise SaaS, Motion Design, Desktop, UX Design, Web, Enterprise, Photoshop CC, DataViz, Team Leadership, AI-powered Product Design, AI Design, Dashboard Design, Interaction Design (IxD), Interactive Prototypes, Wireframing, B2B, B2C, Conversational UX, Enterprise UX, SaaS, Web App UX, Web App Design, Websites, Web Design, Competitive Analysis, Customer Journey, Design Workshops, Journey Mapping, Conceptual Design, Workflow Analysis
Senior Product Designer
2019 - 2020
Disney Studios
- Led the creation of a scalable design system comprising 30 reusable components and foundational design tokens, including color, typography, spacing, grid, icons, motion, and elevation across light and dark themes.
- Designed a responsive 3D product configuration platform that transformed complex product customization into an intuitive experience across desktop, tablet, and mobile.
- Designed a desktop web application that digitized fingerprint identification workflows, replacing manual processes with a streamlined digital experience.
- Designed a responsive web application that centralized master specification guidelines, improving information discovery and consistency across distributed teams.
- Designed a pediatric TV platform that increased patient engagement, user retention, and overall satisfaction during hospital stays.
Technologies: Design Systems, User Interface (UI), User Experience (UX), Mobile, User Journey Maps, Product Design, Usability Testing, Data Visualization, Visual Design, Prototyping, Responsive Design, Mobile UX, User Journeys, Figma, Enterprise SaaS, Motion Design, DataViz, Desktop, UX Design, Web, Enterprise, Photoshop CC, Team Leadership, Dashboard Design, Interaction Design (IxD), Interactive Prototypes, Wireframing, B2B, SaaS, Web App UX, Web App Design, Websites, Web Design, Competitive Analysis, Customer Journey, Design Workshops, Journey Mapping, Conceptual Design, Workflow Analysis
Head of Design Operations
2018 - 2019
Ticketmaster
- Established Ticketmaster's first Design Operations function, creating the processes, systems, and governance that scaled design across the organization.
- Designed and launched a scalable design system comprising 30 reusable components and shared foundations that standardized product development across teams.
- Drove 100% adoption among designers and 40% adoption among engineers through governance, education, and implementation support.
- Built interactive prototypes that accelerated engineering alignment and reduced implementation ambiguity before development.
- Authored comprehensive component documentation and usage guidelines to ensure consistent implementation across design and engineering.
Technologies: Design Systems, User Interface (UI), User Experience (UX), User Research, Visual Design, DataViz, Mobile, User Journey Maps, Product Design, Usability Testing, Prototyping, Responsive Design, Mobile UX, User Journeys, Figma, Enterprise SaaS, Motion Design, Desktop, UX Design, Web, Enterprise, Dashboard Design, Interaction Design (IxD), Interactive Prototypes, Wireframing, B2B, Web App UX, Web App Design, Websites, Web Design, Competitive Analysis, Customer Journey, Design Workshops, Journey Mapping, Conceptual Design, Workflow Analysis
Senior Product Designer
2017 - 2018
Ticketmaster
- Led product design for Ticketmaster's enterprise pricing platform, delivering workflow improvements that helped contribute to a 110% year-over-year increase in Gross Ticket Value (GTV).
- Planned and facilitated usability testing with pricing specialists, translating user feedback into iterative improvements that increased adoption of the redesigned platform.
- Owned UX strategy, interaction design, and prototyping from concept through launch, partnering closely with product, engineering, and business stakeholders.
- Designed a scalable visual language for pricing analytics, improving the readability of complex revenue and pricing data.
Technologies: Design Systems, Visual Design, User Interface (UI), User Experience (UX), DataViz, Mobile, User Journey Maps, Product Design, Usability Testing, Data Visualization, Prototyping, Responsive Design, Mobile UX, User Journeys, Figma, Enterprise SaaS, Motion Design, Desktop, UX Design, Web, Enterprise, Dashboard Design, Interaction Design (IxD), Interactive Prototypes, Wireframing, B2B, SaaS, Web App UX, Web App Design, Websites, Web Design, Competitive Analysis, Customer Journey, Design Workshops, Journey Mapping, Conceptual Design, Workflow Analysis
Senior Product Designer
2016 - 2017
Housecall
- Led all product design efforts for a startup with iOS, Android, and web applications.
- Coordinated all usability testing for the redesign effort of the app’s most used page.
- Managed all UI/UX, prototyping, and interaction design efforts.
- Created several animations to assist the engineering.
- Designed color, grid, spacing, and typography systems.
Technologies: Mobile, User Journey Maps, Product Design, Usability Testing, Data Visualization, Visual Design, iOS, Android, Prototyping, User Experience (UX), Responsive Design, Mobile UX, User Journeys, Figma, Enterprise SaaS, DataViz, Desktop, UX Design, Web, Enterprise, Dashboard Design, Interaction Design (IxD), Interactive Prototypes, Wireframing, B2B, SaaS, Web App UX, Web App Design, Websites, Web Design, Competitive Analysis, Customer Journey, Journey Mapping, Workflow Analysis
Lead Product Designer
2015 - 2016
Service Titan
- Led all product design efforts for a startup with web, iOS, and Android mobile applications.
- Managed a successful launch of the redesigned mobile app in the home service industry.
- Conducted all usability testing and user interviews.
- Led all UX, prototyping, and interaction design efforts.
- Designed color, spacing, grid, and typography system.
Technologies: Mobile, User Journey Maps, Product Design, Usability Testing, Data Visualization, Visual Design, iOS, Android, Prototyping, User Experience (UX), Responsive Design, Mobile UX, User Journeys, Figma, Enterprise SaaS, DataViz, Desktop, UX Design, Web, Enterprise, Dashboard Design, Interaction Design (IxD), Interactive Prototypes, Wireframing, SaaS, Web App UX, Websites, Web Design, Competitive Analysis, Customer Journey, Journey Mapping, Conceptual Design, Workflow Analysis
Senior UX Designer
2014 - 2015
Nordstrom Rack/Hautelook
- Led mobile web redesign efforts for both www.hautelook.com and www.nordstromrack.com.
- Learned the business by meeting with cross-functional leadership reviewing web analytics for both web and iOS apps.
- Instituted low budget, guerrilla-style user interview program to observe and record user shopping behavior across the entire consumer lifecycle.
- Achieved 0.2% conversion lift by designing proactive size filter feature.
- Designed several feature improvements for the iOS app.
Technologies: Mobile, User Journey Maps, Product Design, Usability Testing, Visual Design, iOS, Android, Prototyping, User Experience (UX), Responsive Design, Mobile UX, User Journeys, Figma, UX Design, Web, Enterprise, Dashboard Design, Interaction Design (IxD), Interactive Prototypes, Wireframing, B2C, Web App UX, Workflow Analysis
Education
1994 - 1998
Bachelor of Science Degree in Consumer Science
University of Wisconsin – Madison - Madison, Wisconsin, United States
Skills
Tools
Photoshop CC, Claude, Adobe Lightroom, Jira, Figma Make
Platforms
Web, Mobile, Desktop, Figma, iOS, Android
Other
User Experience (UX), User Interface (UI), Enterprise, Enterprise SaaS, UI Design, Mobile UI Design, Mobile UX Design, UX Design, UX Flows, Design Systems, Product Design, Mobile UX, Mobile UI, Web UI, User Interviews, User Flows, User Research, User Journeys, User Journey Maps, Visual Design, Responsive Design, Prototyping, DataViz, UX Leadership, Cross-platform, Dashboard Design, High-fidelity Mockups, Interaction Design (IxD), Interactive Prototypes, Wireframing, B2B, SaaS, Web App UX, Web App Design, Websites, Web Design, Competitive Analysis, Customer Journey, Design Workshops, Journey Mapping, Conceptual Design, Workflow Analysis, Usability Testing, Data Visualization, Blockchain, Web 3.0, AI-powered Product Design, B2C, Conversational UX, Motion Design, Computer Science, Team Leadership, AI Design, ChatGPT, Lovable, Linear, Cursor AI, Enterprise UX, Developer Relations, Material Design
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