thebuilder.dkDaniel Schmidt
Weak signal
Signal lost
Daniel Schmidt
Frontend engineer working on the difficult parts between product, design and engineering.
I care about architecture, accessibility, performance and developer experience, and about building things that are still pleasant to work with years later.
The day job
At Charlie Tango, I help set the technical direction on larger web projects while staying hands-on as a developer.
I’ve helped shape our frontend platform and engineering practices, led frontend architecture, improved accessibility and testing, mentored developers, and built tooling that makes the work easier for the teams using it.
  1. 2026Viaplay Sport NewsSports newsroomUmbraco Awards runner-up
  2. 2025SundhedsstyrelsenPublic health
  3. 2024MDT+Clinical decision support
  4. 2023FeriepartnerHoliday booking
  5. 2022EDCProperty platform
  6. 2020VælgererklæringPublic service
  7. and many more
Built for Umbraco
Open source, for the CMS behind most of that work.
  1. blur-placeholder
    Image placeholders generated once, in Umbraco.
    Generated when the image is saved and handed to the frontend as one string. Public requests do no work.
    Look insideDocsSource
  2. web-analytics
    Vercel and Plausible reports inside the Umbraco backoffice.
    Traffic, and the numbers for the page being edited, without opening another tab. It reads the analytics you already run.
    Look insideDocsSource
  3. @charlietango/umbraco-rich-text
    Umbraco rich text, rendered as React components.
    Renders the Delivery API rich text JSON as React, with a hook to swap any node or block for a component of your own.
    Look insideSource
Open source
I maintain react-intersection-observer, a React library downloaded around 20 million times a month, along with a handful of other projects.
Open source is where I get to scratch the kinds of technical itches that turn up repeatedly in real projects, and occasionally discover that several million other people had the same itch.
  1. react-intersection-observer
    Tell a React component when it enters the viewport.
    A hook, a render prop, and a component over the Intersection Observer API. It reuses observers where the options match, and ships a test mock so tests do not need a browser.
    Look insideDocsSource20M downloads a month
It’s a Unix system!
When I saw Jurassic Park back in 1996, the dinosaurs were cool. But not as cool as the “unix” file system, flown through in 3D to lock the doors. I have wanted to build one ever since.
  1. FSN
    Visualize and navigate your file system in 3D space.
    Point it at a folder and the files stand up in front of you, in the same arrangement every time you open it.
    Source
One got out
It has been hanging over the canyon since 1978, and there are fifty-four more behind it.
Say hello
EDC
A content-heavy property platform with a custom React layer integrated into .NET.
Solution architect & frontend lead · 2022
edc.dk
EDC.dk is a large property platform with property search, editorial content, local agency pages and a wide range of services for buyers and sellers.
I worked as solution architect and frontend lead. A central part of the project was building a custom React rendering solution that integrated with the existing .NET platform. This allowed us to build the frontend in React instead of relying on Razor for the user interface.
That gave the frontend its own development and testing loop. We could build components in Storybook and test the interface without needing data from .NET or running the complete application. UI states could be reviewed and verified in isolation before the components were connected to the backend.
This was particularly useful on a site with a large amount of content and many different page types. React gave us a consistent component model, while Storybook and automated tests made it easier to change the interface without accidentally breaking another part of the site.
Technology
React, Vite, Storybook, Node.js, .NET, Umbraco CMS
Focus
Custom React rendering, .NET integration, component development, testing and frontend quality