Sergio is available for hire
Hire SergioSergio Leira
Verified Expert in Design
Designer
Location
San Carlos de Bariloche, Río Negro, Argentina
Toptal Member Since
December 15, 2017
Sergio is a UI/UX product designer with 18+ years of experience building user-centered products and providing end-to-end solutions for startups. He has released 40+ apps worldwide for brands like Disney, Fifa, and Messi. He has led design teams and has created an award-winning app that reached 15 million users, increasing fan engagement, retention, and monetization to overwhelming levels. Sergio is a designer with great versatility and is eager to face new challenges.
Portfolio
Work Experience
UI/UX Designer
2023 - 2023
SINES, Inc
- Grew and organized a design system for a previously designed product.
- Created new pages and flows for a web app in order for users to subscribe to the app.
- Built a new version of the design source files in Figma.
Technologies: Mobile Design, iOS, Mobile UX Design, Mobile UI Design, Style Guides, Responsive Web Design (RWD)
Mobile UX/UI Designer—Health Tracking Mobile App
2022 - 2022
Jenevive Health LLC
- Designed a mobile app that lets people track their health, especially for a certain disease.
- Created an interactive prototype for all the improved flows and delivered a new UI for iOS and Android devices.
- Delivered high-fidelity mockups ready for a development handoff.
Technologies: Mobile Design, Mobile UI, Mobile UX, Mobile Mockups, Health, Health IT, Visual Design, UI Design, Mobile App Design, Prototyping, iOS, Android, Adobe Experience Design (XD), Design Systems, Component Libraries, Responsive Web Design (RWD), Mobile UI Design, App Design
UX/UI Designer
2019 - 2022
Sports Buff
- Acted as the lead designer for the real-time fan engagement, gamification, and monetization audience platform. Included a desktop SDK, mobile app, Twitch app, website, and dashboard.
- Created micro-interactions and iOS native solutions for the mobile app.
- Designed an SDK solution for implementation as an OTT product.
Technologies: Adobe After Effects, Zeplin, Adobe Photoshop, Adobe Experience Design (XD), Mobile UX Design, UI Motion, Figma, Gamification, Visual Design, Mobile Design, UI Design, Mobile App Design, Web Design, Prototyping, Dashboard Design, iOS, Android, Web Applications, Design Systems, Component Libraries, Style Guides, Responsive Web Design (RWD), Mobile UI Design, App Design
Mobile Headset Product Designer
2021 - 2021
RealWear - Main
- Redesigned and improved the UI/UX flows for a small voice-activated screen Android-based tablet and watch to be worn with an industrial helmet for workers in the field, factory, or warehouse.
- Redesigned the SaaS admin screens for an IoT-type device that includes analytics, charts, tables, and user permissions.
- Led the UX process and workflow. Collaborated closely with a cross-functional team to build and ship designs and produced high-quality creative solutions to complex problems based on research and goals.
Technologies: SaaS, Product Design, UI Design, Prototyping, Chart Design, Dashboards, UX Design, Internet of Things (IoT), Web App UX, User Experience (UX), User Interface (UI), Visual Design, Mobile Design, Mobile App Design, iOS, Android, Figma, Design Systems, Component Libraries, Style Guides, Mobile UI Design, App Design
Web/Visual Designer
2020 - 2020
MMCA Inc
- Redesigned UX flows for the company's web app in order to improve access to their games and promote engagement and learning.
- Helped maintain and grow their existing design system.
- Designed the UI and interactive prototypes for their website.
Technologies: UI Design, Product Design, Web Design, UX Design, Figma, Zeplin, Responsive Web Design (RWD)
UI/UX Designer for Innovative Startup Capturing Feedback with Video via Mobile
2019 - 2020
Anatomap Limited
- Designed an innovative mobile app that captures user feedback and includes capturing and editing photos and videos.
- Helped delineate product decisions over software for securely storing legally admissible evidence for crime victims.
- Designed the company website, the mobile app for iOS and Android, and the desktop client and management dashboard.
Technologies: User Interface (UI), UI Design, Product Design, Visual Design, Graphic Design, Mobile Apps, User Experience (UX), UX Design, Conversational UI, Flutter, iOS, Android, Video Capture, Questionnaires, MacOS, Mobile Design, Mobile App Design, Web Design, Prototyping, Dashboard Design, Adobe Experience Design (XD), Web Applications, Design Systems, Style Guides, Responsive Web Design (RWD), Mobile UI Design, App Design
UX Senior Designer
2016 - 2019
Globant
- Served as UI/UX designer of native iOS and Android apps in addition to websites for globally recognized brands.
- Created a variety of digital products for different industries based on service over the platform while leading a small UX/VD team.
- Applied a user-centered design process from analysis, requirements refinement, user research, information architecture design, prototyping, usability testing, and visual designing.
Technologies: Zeplin, Adobe Illustrator, InVision, Sketch, Adobe Photoshop, Mobile UX Design, Visual Design, Mobile Design, UI Design, Mobile App Design, Web Design, Prototyping, Dashboard Design, iOS, Android, Adobe Experience Design (XD), Web Applications, Design Systems, Component Libraries, Fintech, Style Guides, Responsive Web Design (RWD), Mobile UI Design, Data Visualization, App Design
Mobile Designer
2018 - 2018
SPD Tech
- Designed the Ground Dash Mobile app UI, a safety app disguised as a fleet management tool.
- Refined product aspects in order to give the app a more user-centered approach.
- Designed the complete UI in iOS and Android for implementation over Xamarin.
- Reorganized complex data inputs and large forms into friendly user interactions.
- Built a completely interactive prototype for the app with InVision.
- Created deliverables to hand off development and style guides.
Technologies: Android, iOS, Visual Design, Mobile Design, UI Design, Mobile App Design, Prototyping, Mobile UI Design, App Design
UI/UX Lead Designer
2014 - 2016
Iamat
- Served as UI/UX designer for iOS, Android, and Windows mobile apps.
- Contributed to UI/UX designs for responsive websites.
- Created apps designs which won the company design awards.
- Built interactive prototypes for a variety of apps.
- Designed apps with more than 11 million downloads.
Technologies: Zeplin, Adobe Illustrator, InVision, Sketch, Adobe Photoshop, Mobile UX Design, Gamification, Visual Design, Mobile Design, UI Design, Mobile App Design, Web Design, Prototyping, Dashboard Design, iOS, Android, Web Applications, Responsive Web Design (RWD), Mobile UI Design, App Design
Education
2008 - 2012
Photographer in Fine Art Prints
DB Photo Studio - Buenos Aires, Argentina
2002 - 2007
Bachelor's Degree in Graphic Design
Nueva Escuela de Diseño y Comunicacion - Buenos Aires, Argentina
Certifications
MAY 2017 - PRESENT
Web Designer
Acamica
MAY 2007 - PRESENT
Fine Art Prints
Escuela de Fotografia DB - Buenos Aires, Argentina
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