Stelian Subotin, Designer in London, United Kingdom
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Stelian Subotin

Verified Expert  in Design


London, United Kingdom
Toptal Member Since
February 23, 2017

Stelian is a UI designer with over seven years of experience designing and building projects of different scales from the ground up. He has a wide range of user-oriented design experience, having worked for clients that range from small startups to large enterprises that serve over three million people monthly. Stelian believes that UX principles are the foundation of beautiful user interfaces.


Work Experience

UI/UX Designer

2012 - PRESENT
Freelance UI/UX
  • Worked with companies ranging from small startups to big corporations.
  • Developed a variety of websites, interfaces, mobile applications, and MVPs.
Technologies: Balsamiq, Sketch, InVision, Adobe Photoshop, UI Components, Prototyping, SaaS Design, Layout Design, Framer, Interactive UI, Software as a Service (SaaS), Complex Web Systems, Web App Design, Complex Application User Interfaces (UI), Product Design

UI/UX Designer

2020 - 2020
Caterpillar (via Toptal)
  • Evaluated and suggested improvements to web and mobile applications that were part of the CAT ecosystem of digital products.
  • Designed and iterated on the design of web and mobile applications that were part of the CAT Wear Management Systems - part of the CAT ecosystem of digital products and services.
  • Worked on improving, completing, and adjusting Caterpillar's design system elements and principles that are used to provide a coherent and aligned digital experience to CAT's products and services on the web and mobile.
Technologies: UX Research, Design Systems, UX Design, UI Design, Figma

UI/UX Designer

2017 - 2020
Proton Technologies AG
  • Designed an application that creates more flexible experiences for users seeking secured, Swiss-based email used by 20+ million people.
  • Proposed and designed bulletproof solutions ranging from mobile applications, web apps, and full-cycle product design needs.
  • Worked alongside developers and product managers to ensure product success.
Technologies: Balsamiq, Adobe Photoshop, InVision

UI/UX Designer

2013 - 2015
Drift Agency
  • Designed interfaces and platforms that helped solve problems regarding the web presence of real estate companies, consulting firms, and brokers.
Technologies: InVision, Balsamiq, Sketch, Adobe Photoshop
2018 - 2019

Master's Degree in Human Resources and Project Management

Babes-Bolyai University - Cluj, Romania

2011 - 2013

Diploma in Multimedia Design

National Arts Institute - Chisinau, Moldova


Adobe Photoshop, Figma, InVision, Zeplin, Sketch, Adobe Experience Design (XD), Balsamiq, Adobe Illustrator, Photoshop CC


iOS, Android, MacOS, Mobile

Industry Expertise

Banking & Finance




UI Design, Design Systems, Web Design, Mobile App Design, eCommerce, App Design, User Experience (UX), UX Design, User Interface (UI), Dashboard Design, UI Components, Prototyping, SaaS Design, Layout Design, Software as a Service (SaaS), Complex Web Systems, Web App Design, Complex Application User Interfaces (UI), Product Design, Front-end, Framer, Interactive UI, Project Management, Client Success, SaaS, Web App UX, B2B, Apps, Reports, App UX, Track, Dashboards, Landing Pages, Websites, Wine & Wineries, eCommerce Design, Layout, Website Redesign, Responsive, Statistics, Web UX, Clean Design, UX Research

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