Sebastian Mitchell, Designer in Barcelona, Spain
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Sebastian Mitchell

Verified Expert  in Design


Barcelona, Spain
Toptal Member Since
July 26, 2019

Sebastian has over half a decade of experience in the design of enterprise-level tools for users worldwide. Leading the consulting unit at Ushahidi, the award-winning nonprofit software company, he designed products used by the world’s largest NGOs to fight corruption and save lives. Sebastian worked for Nokia, the Red Cross, and the UN Food and Agriculture Organisation. He also owned the design of, a blog for citizen scientists acquired by National Geographic in 2018.


Work Experience

UI/UX Designer

2013 - PRESENT
  • Worked directly with clients and development teams to create interfaces for new products.
  • Conducted UX research and consulted on methods and strategies to improve existing tools.
  • Created comprehensive design systems and style guides for large desktop, web, and mobile products.
  • Designed new interaction paradigms for innovative products.
Technologies: Adobe Illustrator, InVision, Adobe Photoshop, Sketch

Solutions Team Managers and UI Designer

2014 - 2016
  • Led the consulting unit at Ushahidi, an award-winning data collection, mapping, and visualization non-profit software company.
  • Managed a team of remote developers and project managers.
  • Designed digital interfaces for international NGOs and universities, including Conservation International, World Vision, the Red Cross, and Tufts University.
  • Gave talks on technology and innovation at conferences in eight countries, notably for the European Commission in Brussels.
Technologies: Adobe Photoshop, Sketch

User Interface Designer

2014 - 2014
  • Directed design and implemented the front end of Ushahidi's custom external projects.
  • Designed UI/UX and developed the front end.
  • Worked with a remote development team and collaborated with external stakeholders.
  • Collaborated with clients including Al Jazeera, World Vision, the Institute for the Future, IFES, Peace Earth, OpenROV, CFE-DMHA, Conservation International, and Index on Censorship.
Technologies: Adobe Photoshop, Sketch

CXL Certified Optimizer

CXL Institute


Sketch, Photoshop CC, Illustrator CC, Figma, Adobe Illustrator, Adobe Photoshop, Principle, Adobe After Effects, Marvel, UI Grid, InVision, Zeplin


Web, iOS, Android, Webflow

Industry Expertise

Music, Human Resources (HR), Consumer Products, Healthcare


HTML, CSS, JavaScript


Interaction Design (IxD), Navigation, Stakeholder Interviews, Web App Design, User Experience (UX), Web Applications, Design Strategy, Design Leadership, Visual Design, UI Design, UX Design, Mobile App Design, Product Design, Web App UX, Mobile Design, User Onboarding, UX Strategy, Interactive Prototypes, Desktop App Design, Data Visualization, Landing Page Design, Synthesizers, Responsive UI, Responsive Design, Project Management, Front-end Development, Remote Work, Military, Web UI, Web UX, Usability Testing, Responsive Web Apps, Design Systems, HR Tools, App UX, Web UX Design, Non-governmental Organizations (NGOs), Data Collection, Data Analysis, Data Management, Community, Blog Design, Websites, Icon Sets, Minimal UI, User Interface (UI), Web UI Design, Branding, Product Branding, Cryptocurrency, App UI, Cloud Computing, UX Prototyping, Music Production, Conversion Rate, Web Design, Software Design, Mobile UI, Music Industry, Wireframing, SaaS, SaaS Design, Enterprise SaaS, Prototyping, User Stories, Task Flows, User Flows, Web App UI, eCommerce, eCommerce UX, Conversion Rate Optimization (CRO), Email Template Design, Email, Email Design

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