Hey there, I'm Markus.

I'm a freelance Full Stack Web Developer based in Vienna, Austria. Welcome to my personal website, get ready for some great tips on programming, biohacking, and life in general. Enjoy!

Check out my latest activity on GitHub!

Markus Hatvan

Recent Posts

January 14th, 2021 · 8 min read · Lifestyle

Have you ever found yourself standing in the shampoo isle of a store, reading the contents of the bo...

January 6th, 2021 · 9 min read · Programming

It is certainly a challenging adventure to switch from the secure and predictable path as a member o...

November 8th, 2020 · 9 min read · Lifestyle

Regular scandals of data leaks by big corporate companies and concerns about misuse of personal info...

View all blog posts

Do you need help with your product development?

It's my goal to create web and app solutions for go-getters that value code quality, high performance and consistency all while feeling supported and understood.

Get in touch

Current Projects


Personal website and blog written from scratch with SvelteKit and TailwindCSS.

Built with SvelteKit, Svelte, TailwindCSS, NodeJS, Rollup, Markdown, GitHub, Netlify

DAW Comparison

Compare and find the ideal DAW for your needs.

Built with Gatsby, React, Ant Design, Markdown, GitHub, Netlify


Helping people find a side job.

Built with React Native, Typescript, GraphQL, Formik, Jest, Sentry, Slack, GitHub, Hasura, Firebase


The private way of tracing contacts.

Built with VueJS, Vuex, Google Maps, Leaflet, NodeJS, Typescript, Slack, Gitlab, Trello, Swagger UI


I highly recommend Markus as an exceptional developer — who is dedicated to producing quality code. He completes his tasks beyond expectations, adds thoughtful discussions to the greater picture of a project, and cares about the projects he works for. It would be a pleasure to work with him again in the future.

Robin Wieruch, Founder of robinwieruch.de

Markus is an excellent developer and certainly produced great work for us. He’s also a great team player: reliable, communicating well and proposing solutions. As project complexity increases, this second part can be a real life saver.

Jeremy Lefèbre, Founder of slowlettuce.io

I’ve worked with many engineers over the past ten years, and Markus is a beast. He’s self-directed, thoughtful, and fast. He has excellent written and verbal communication skills and is candid and direct when his opinion is asked. I reached out to him for some unorthodox app development based on his GitHub profile and what I feared would take weeks and thousands of dollars was complete in days and far beyond my expectations. My only hesitation in writing this review for him is that I want all his time for myself and have no doubt that he will be in high demand, given his skill set and personal qualities. Grab this guy quick because he’s about to be in limited supply.

Justice Conder, Founder of singularityhacker.com

Open Source Contributions

React Boilerplate

🔥 A highly scalable, offline-first foundation with the best developer experience and a focus on performance and best practices.


💌 A beautiful, fast and maintained fork of @nylas Mail by one of the original authors.


Microsoft Web Template Studio quickly builds web applications using a wizard-based UI to turn your needs into a foundation of best patterns and practices


The official Semantic-UI-React integration


Various awesome ESLint rules

If somebody wrote a book about your life, would anybody want to read it?


Betcha didn't know that?! · Slides
Vienna.js · Vienna, Austria
Best practices for open source contributions · Slides
freeCodeCamp Vienna · Vienna, Austria
Why I Recommend Svelte to Every New Web Developer · Video · Slides
How I built a Sapper blog with all the must-have features · Video · Slides
MMT Tech · Remote
How to boost web dev efficiency · Video · Slides
Angular Vienna · Vienna, Austria