Josiah Duinkerk, Designer in Almere, Netherlands
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Josiah Duinkerk

Verified Expert  in Design


Almere, Netherlands
Toptal Member Since
November 14, 2017

The best way to describe Josiah's work ethic is creative efficiency. He believes that projects can run smoothly and effectively by managing expectations, setting up good communication processes, and finding the balance between business goals, technology, and user experience.


Work Experience

Founder | Product Designer

2018 - PRESENT
Annut Design & Development
  • Facilitated design sprints to help define MVP concepts and align stakeholders.
  • Translated wireframes into visual designs for dashboards, responsive web, and mobile.
  • Conducted user research (A/B tests, interviews, etc.) to better understand user needs and pains.
  • Managed junior team members and helped them develop their skills while meeting company objectives.
  • Designed an entirely interactive and responsive design system with light and dark modes from scratch. I also managed its implementation in Angular and publication on Storybook.
  • Conducted user research, and created wireframes, user journeys, and personas.
Technologies: PWA, InVision, Sketch, Figma, Angular, React

Product Designer

2022 - 2023
KLM Royal Dutch Airlines
  • Designed a user friendly interface used to adjust the parameters of a complex data modal system. Acted as a product designer for a B2B app to optimize pilot planning.
  • Created data visualization in graphs, tables, and charts to help give meaning and insight to modal results.
  • Conducted the migration from Sketch to Figma of the design system's component library.
  • Created high-fidelity prototypes to do user validation and present to the board.
Technologies: Figma

UI Designer

2022 - 2022
McKinsey & Company (INU)
  • Designed the complete component library, a part of the design system, in less than two months.
  • Created a brand identity guide website complete with documentation, color, typography, and resource assets.
  • Translated initial wireframes to high-fidelity final designs.
  • Redesigned a responsive website and created reusable components.
Technologies: Design Systems, Mobile UI, Mobile UX, Fintech, Product Design, Mobile App UI, Mobile UX Design, UI Components

UX/UI Designer

2020 - 2021
  • Redesigned the global internal communications platform in line with the updated brand guidelines.
  • Designed an internal trading and analytics tool that utilizes artificial intelligence (AI) to optimize trading and planning.
  • Created screens in association with the research department to conduct A/B tests.
  • Produced PowerPoint slide decks for internal communication.
Technologies: InVision, Sketch

Product Designer

2019 - 2019
  • Conducted usability research to test out a new mobility as a service mobile app.
  • Fleshed out a high-fidelity prototype so people can plan their trip via public transportation, car and a combination of both.
  • Worked on the newsletter design and created A/B test designs.
  • Developed user journeys to better understand the pain points of travellers and to come up with feasible solutions.
  • Updated the mobile eCommerce website to make it more user friendly and give it a more contemporary look and feel.
Technologies: InVision, Sketch

UX/UI Designer

2018 - 2019
De Persgroep
  • Fully redesigned the responsive website and mobile app of the digitalise deals catalog with over 4 million monthly users.
  • Conducted user research to optimise the tone of voice and test new navigation.
  • Created a digital style guide so other departments like marketing can keep design consistent.
  • Gave presentations to stakeholders and documented the new visual direction.
  • Worked closely with the product manager and developers to ensure proper implementation of design.
Technologies: Sketch, InVision

Senior UX Designer

2017 - 2018
  • Conducted user research to better understand business banking pain points and ran pair design sessions to create solutions.
  • Helped banks upgrade their legacy systems and software to industry standards.
  • Created high-fidelity prototypes for sales teams to pitch to potential clients.
  • Traveled on-site at banks and worked with their design team on adapting the template software to their specific needs.
  • Worked as part of a team that was building the design system for the company to increase productivity and consistency.
Technologies: Adobe Photoshop, Sketch, InVision

UX Lead

2016 - 2017
  • Helped a predominantly tech-focused company to realize the importance of a good UX and UI across each of their brands and the platforms (web, mobile, tablet, and in-car).
Technologies: Balsamiq, InVision, Sketch

Senior UX Designer

2014 - 2015
  • Oversaw the education and mentoring of junior designers.
  • Carried out projects for major clients such as Philips, ING, Rabobank, ABN AMRO, and Amels.
Technologies: Adobe Illustrator, Adobe Photoshop, Sketch

Lead GUI Designer

2011 - 2013
2Gears, Appoint Solutions
  • Created all graphical elements for the company’s games and apps.
  • Participated in the concept development, copywriting and marketing.
Technologies: Adobe Illustrator, Adobe Photoshop

Visual Designer | Founder

2007 - 2011
  • Founded a design agency to apply my creativity across multiple channels to meet the needs of a diverse clientele.
  • Designed for the web, packaging, and print for clients coming from a variety industries spanning eCommerce, entertainment, and social sectors.
Technologies: Adobe Illustrator, Adobe Photoshop


InVision, Sketch, Figma, Adobe Photoshop, Balsamiq, Adobe Illustrator, Trello, After Effects CC

Industry Expertise

Banking & Finance, Real Estate, Insurance, Entertainment & Leisure, Fashion & Beauty


Android, iOS, Mobile, Webflow


Responsive, iPhone, Redesign, Prototyping, UI Design, Mobile UX Design, UX Design, Design Systems, Responsive Web Design (RWD), Fintech, Product Design, User-centered Design (UCD), Wireframing, Responsive UI, Web Design, User Interface (UI), User Experience (UX), Mobile UI, Mobile App UI, Component Libraries, Visual Design, UI Components, Enterprise Design, PWA, iPad, User Research, Interaction Design (IxD), eCommerce, Framer, B2B, Tablet Design, eCommerce Design, Home Furnishing, UI Branding, Streaming, Responsive Web Apps, Appointment Booking, Template Design, Checkout, Conversion, UX Flows, UI Animation, Dashboard Design, Notion, Angular, React, Mobile UX, Lottie, Motion Design

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