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Designer and developer

Websites, apps and business workflows.
From the first idea to everyday use.

Explore my experience

About me

I am Jan, the person behind 0x64. I combine design and development, from layout and content through interactions to a working application. I care about products that look good and make everyday work easier. I also develop my own product, Calio, which means I consider more than the first impression: how a product evolves and how people actually use it matter just as much.

My main areas of work:

  • React and Next.js
  • TypeScript
  • UI design
  • API integrations
  • AI and workflows
  • Responsive design
  • Animation and interaction

Experience

  1. Product creator and developer

    Calio·Own product

    PresentApplication design and development

    I am building an app for bookings, calendar management and organising work. I combine interface design with application logic and integrations.

    Scope of work
    • Product website and app built as one coherent system
    • Calendar, bookings and customer management
    • Developing features and refining everyday user journeys
    • React
    • TypeScript
    • Interfaces
    • API integrations

  2. Website designer and developer

    0x64·Independent work

    PresentFrom idea to launch

    I design and build websites and web apps. I work on layout, content, interactions and development, which lets me test design decisions in a working version from the outset.

    Scope of work
    • Visual design and responsive development
    • Animation, interaction and support across devices
    • Preparation for launch and ongoing development
    • Next.js
    • UI
    • Responsive design
    • 3D animation

  3. AI integrations and workflows

    0x64·Business solutions

    PresentProcesses and automation

    I connect interfaces, data and tools in workflows that fit how a business operates. I define the role of AI around the task and how its output can be checked.

    Scope of work
    • API connections between business tools
    • AI assistants and information flows
    • Automation of repetitive tasks
    • AI
    • API
    • Workflow
    • Automation

Learning and development

  1. Learning through building

    Own products and working solutions

    Continuous learning

    I develop my skills through hands-on work on interfaces, code and integrations. I test decisions in the browser, across screen sizes and within specific user journeys.

    • Application architecture
    • UI and interaction
    • Performance

  2. Technology in practice

    Documentation, experiments and releases

    Ongoing

    I keep up with developments in web tools and AI models. I test new approaches in small, working prototypes before making them part of a larger solution.

    • React and Next.js
    • AI integrations
    • Workflow

Skills

Design, interfaces and technology — choose an area to see how I bring them together.

Websites and web apps

Screens, forms and navigation that are comfortable to use. Shared components help keep the product consistent as it develops.

Open to new projects

Let’s build something
worth using.

Have an idea for a product, a website or a process that could work better? Tell me what you need and we will decide where to start.

hey@0x64.siteLet’s talk