John Challis, Designer in Singapore, Singapore
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John Challis

Verified Expert  in Design


Singapore, Singapore
Toptal Member Since
December 14, 2016

John is an experienced product manager and designer with skills in creating end-to-end user-centric experiences from concepts and research to wireframes and high-fidelity deliverables. He's worked with companies at all different scales from startups to large corporations like IBM on both B2B enterprise SaaS and consumer-focused products. John has experience collaborating with remote development and product management teams.


Work Experience

Product Designer | Manager

2017 - PRESENT
  • Designed a communication platform for a funded startup, connecting ER nurses with remote doctors. Included native iOS and Android mobile apps, tablets apps, and a web platform. Created a brand color scheme and a custom icon set for the apps.
  • Designed a property management iOS app for a startup that allowed residents, property managers, and maintenance employees to communicate in a seamless experience.
  • Designed an internal reporting tool for the consumer tech market. The tool aggregates data from a variety of vendor and third-party sites and shows insights for managing inventory, fulfillment, customer service, and a variety of business functions.
  • Worked on updating a GPS platform for a consumer tech company and redesigned several new features to make it more user-friendly and intuitive.
  • Designed a contract management platform for a startup in the enterprise SaaS space. Created user flows, information architecture, wireframes, high-fidelity designs, branding, and the style guide.
  • Designed a production management platform for a technical parts manufacturer. The platform is web-based with an iOS app component.
Technologies: Illustration, InVision, Sketch

UI/UX Product Designer

2015 - 2017
  • Worked in an Agile environment to implement innovative solutions for users following IBM design thinking methodology.
  • Led and participated in the digital product design process from research and ideation to wireframing and user testing, creating hi-fidelity designs and implementations with development.
  • Facilitated design thinking workshops and held feedback meetings with key clients.
  • Designed a service design and software design experience to help improve IBM's business process outsourcing business.
  • Worked on combining two cloud platforms (Bluemix and Softlayer) with thousands of users each into a unified experience.
Technologies: CSS, HTML, InVision, Sketch, Adobe Creative Suite

Graphic Designer

2015 - 2015
Red Rider Creative
  • Worked with a variety of clients to create company and event branding, brochures, presentations, and other print applications.
Technologies: Adobe Creative Suite

Graphic Designer

2014 - 2015
Wicked Audio
  • Created packaging, displays, and print collateral.
  • Managed and created content for social media accounts and
  • Created and implemented concepts for digital marketing techniques, such as contests, giveaways, and other creative advertisements of products.
  • Planned photo shoots, recruited models, and edited product and lifestyle photos for use in print and web design.
Technologies: Adobe Creative Suite

Web Design Intern

2014 - 2014
Solutions Journalism
  • Created visual concepts and illustrations to promote the brand and to be used on their website.
  • Designed campaign material to be sent to universities across the nation, promoting social innovation.
Technologies: Adobe Creative Suite

Graphic Designer

2013 - 2014
BYU Athletics
  • Created and designed posters, game programs, T-shirts, and social media and environmental pieces for BYU's NCAA sports teams.
Technologies: Adobe Creative Suite
2010 - 2015

Bachelor's Degree in Graphic Design

Brigham Young University - Provo, Utah


Adobe Creative Suite, Adobe Illustrator, Sketch, Adobe Photoshop, Zeplin, InVision, Adobe, Figma, Adobe InDesign


MacOS, Android, iOS, Web, Mobile

Industry Expertise

Consumer Products, Healthcare




UI Design, Apps, Mobile Design, Android App Design, Desktop Web Design, Startups, Reporting System Design, Financial Reporting Dashboards, Reporting, SaaS Design, Web App Design, Web Applications, Early-stage Startups, Web UX Design, Styled-components, MVP Design, UI Branding, Web Platforms, Responsive Web Apps, Financials, Software as a Service (SaaS), User Surveys, Design Thinking, Visual Design, UX Design, Dashboard Design, Data Visualization, SaaS, Mobile UI Design, B2B, B2C, Product Design, User Interface (UI), User Experience (UX), Mobile Apps, Mobile App UI, Mobile App Design, Web Design, Responsive Layout, Web Dashboards, Dashboards, Wireframing, User Flows, Design Systems, Information Architecture (IA), Portal Design, User Portal Design, Prototyping, Testing, Graphic Design, Web App UI, Web App UX, Interactive Prototypes, Enterprise, Enterprise Design, Enterprise SaaS, Enterprise Software, Platform as a Service (PaaS), UX Flows, iOS App Design, App UX, App UI, Mobile UI, Mobile UX, Style Guides, UI Style Guides, System Design, Personas, User Personas, User Journeys, User Journey Maps, Websites, Responsive Design, Responsive Web Design (RWD), UI Prototyping, UI Patterns, Web UX, Web UI, User Interviews, Annotated Wireframes, Consumer-facing Product Design, Platform Design, Platforms, User Paths, Graphs, Google Material Design, Color Concepts, PowerPoint Design, Mobile UX Design, Patterns, UI Components, Style Kits, User Research, User Testing, Mobile GPS, Illustration, Legal, Legal Technology (Legaltech), Project Estimation, Design Leadership, UX Research, Design Research, Agile, Brand Design, Branding, Scrum, eCommerce, Bootstrap, CRM Design

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