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

November 10, 2021 · 8 min read · Programming

There are many great ways of how you can begin building your confidence and showing your clients why...

August 18, 2021 · 4 min read · Lifestyle

Let’s take a look at some free tools you should check out that will help you run a smoother, more re...

January 14, 2021 · 8 min read · Lifestyle

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

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

Projects that I am working on


Simplifying the injury legal process to make it as painless as possible

Built with Next.js, React, TypeScript, Chakra UI, Storybook, Node.js, Firebase, AWS, Figma, Netlify


Berlin’s UX design agency for early-stage tech startups

Built with SapperJS, Svelte, Bulma, NodeJS, Rollup, Markdown, Github, Netlify, Asana


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

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


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 quickly because he’s about to be in limited supply.

Justice Conder, Founder of Singularity Hacker

Markus came to the Ferdi repo, and started reporting bugs, and some fixes. Within a short period of time (if I remember, it was literally 3-4 weeks), he had a good grasp of the complex, legacy app - and was suggesting discussions, raising PRs, commenting on bugs reported by others, etc. - all the responsibilities that a maintainer on any OSS project does. His genuine passion to fix bugs, suggest and implement enhancements (be they small or big) - is astounding to me. Over the past few months, he has been a bedrock and a great co-collaborator on this journey, and I have high hopes for the future of Ferdi with him being so active!

Vijay Aravamudhan, Maintainer of Ferdi

On every project I worked on together with Markus, he was an essential part of the team. With his high demand for software quality and a smooth development workflow, he has always contributed significantly to the success of the projects. He is constantly learning and using the latest technologies and is very good at passing on these learnings to the team. He always keeps the bigger picture in mind and his calm but direct manner is conducive to strengthening the team spirit and creating a good working atmosphere.

Matthias Eigner, Founder of CodeCove

I am glad that twice I had a chance to work with Markus in one team! I can highlight his aspiration of clean code, maintainability, and automation. Markus is very open to new technologies and tries to understand how things are working in-depth rather than just cover basics. Aside from his impressive tech skills, he is also a nice person to chatting with, and he can always recommend a great craft beer!

Dmytro Mezhenskyi, Author of Decoded Frontend

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 Robin Wieruch

I had the pleasure of working with Markus on a large e-commerce project. He has very strong technical background knowledge, with which he has significantly improved the development experience for a team of over a hundred developers. I will be very happy to work with him again at the next opportunity and can recommend him unreservedly.

Jonathan Häberle, Founder of Alm Engineering GmbH

Markus Hatvan is a great front-end Svelte developer. He did an excellent job for our company, and he was also a valuable team member. He communicated well, was reliable, and could be counted on to be available when needed. I would recommend him to anyone in need of a front-end developer!

Francois Lamotte, Founder of Pageverify

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 lifesaver.

Jeremy Lefèbre, Founder of SlowLettuce

Past Open Source Contributions


Cybernetically enhanced web apps

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.


💡 A hinting engine for the web


🧔🏽 Ferdi helps you organize how you use your favourite apps by combining them into one application


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


Various awesome ESLint rules

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


TBD Betcha didn't know that?! · Slides
Vienna.js · Vienna, Austria
July 20, 2021 Contributing To Open Source Projects The Right Way · Slides
Vienna.js · Vienna, Austria
March 25, 2021 Why I Recommend Svelte to Every New Web Developer · Video · Slides
September 24, 2020 How I built a Sapper blog with all the must-have features · Video · Slides
MMT Tech · Remote
April 12, 2018 How to boost web dev efficiency · Video · Slides
Angular Vienna · Vienna, Austria