Hi, I'm Dennis!

Web developer helping you to build your next project.

Picture of Dennis Kortsch in comic style. He says: 'Sup?'

Helping software teams since 2010

Work Experience

Since 2010, I've been helping various companies deliver enjoyable, performant, and accessible user experiences. Some examples:

Building a search engine with Ecosia.
Currently, I'm assisting Ecosia in scaling their frontend to handle over 10,000 searches per minute. My team is focused on enhancing the search experience with AI.
Doing e-Commerce at scale at Zalando.
I played a key role in rebuilding Zalando's B2B platform. Including integrating a Design System to improve Developer experience and keep the UI consistent.
Enterprise SEO tools at Searchmetrics.
I created AI-assisted content editors for Searchmetrics before AI became a mainstream buzzword.
Tiled screenshot of various websites of projects I've worked on.

Get the help you need

Work with me!

I can support your team as a freelance software engineer and consultant or help you build your next MVP.

Fullstack development
I can build your whole application from the ground up. From the database to the frontend, I got you covered.
Anything Typescript & React
I've been working with the Typescript & React ecosystem for over 10 years. Through the years, I've accumulated a lot of experience and know how to build scalable, maintainable, and performant applications.
Ship fast
Got an idea? I'll build it faster than you can raise your Seed Round. I build solid, scalable MVPs.
AOE development
In video games, Area of Effect (AOE) refers to the radius of an effect. I will try to make the biggest impact possible and elevate your whole team.

Let’s talk about your project

Tell me know how I can help you.

“Working with Dennis was a pleasure. He was able to quickly and efficiently solve a problem that I had been struggling with for weeks. I would definitely recommend him to anyone looking for a talented developer.”

Portrait of Sara CEO of Kwaisi
CEO of Kwaisi