About me


Software Developer, professionally since 2014.

Blogger, occasionally since 2012.

DIY & IoT enthusiast.

Italian, german & english speaking.

Email me at hey [at] cri.dev

Twitter @christian_fei

I am a passionate software developer. I like to build digital products that meet the customer’s needs.

During the past few years I expanded my knowledge with methodologies, techniques and programming languages, at work and in my spare time.

Between 2014 and 2017 in XPeppers I adopted essential practices to write maintainable software and work effectively with my team, collaborate with the customer in a lean and effective way.

Between 2017 and 2020 I worked for Wonderflow, a Startup based in Amsterdam/Trento. I was the first hire and mentored others in the development team. Quickly learned how to understand the customer’s needs and through short &
effective releases bring value to them.

Currently employed at Casavo, improving the housing experience, I’m diving deep into Domain-Driven Design, Event-Sourcing, Elixir, Kotlin and Python.

I try to focus more on concepts and practices than on the technology or programming languages.

Great software is created first with a solid foundation of practices to reduce stress that enable you to maintain the software like tests, code refactoring, continuous integration, clean code.

In my opinion good software development is about people, so I embrace and truly believe it’s essential to have a tight collaboration and effective communication between the team and the customer.

My main programming language is JavaScript & Node.js, I also get things done in Python and Elixir.
I had the opportunity to work with Java and PHP too. In the past I experimented with Haskell, Elm and Go.

Work experience

  • 2014 - 2017: Agile Developer and Software consultant at XPeppers

  • 2017 - 2020: Worked with Node.js, JavaScript, Python, MongoDB, Redis, DevOps, Scraping as a Full Stack Developer at Wonderflow

  • 2021 - now: Working as a Software Developer at Casavo 🚀


Open-Source Projects

Open-source has been a part of me since the very beginning.

My OSS can be found on my GitHub profile.

You can support me on GitHub Sponsors

Coding in all kinds of tech fields that bring value to me, read IoT, Crypto, Bots, Apps, CLI utilities, Automation of all kinds.

mega-scraper aims to be a simple website scraping tool with proxy support, request blocking and various optimizations.

In April 2020 I made a fast static site generator and called it devblog

In the field of IoT I made a watering system with a raspberry pi, camera, temperature and moisture sensors. the communication is handled via telegram. with the help of a bot I can water, request a snapshot or video of the garden and a timelapse of the past days. most importantly this enables me to water my plants remotely and seeing their current state through an image sent on a private telegram channel.

Right now I am probably writing code for


Had the pleasure to work with the following programming languages

  • JavaScript / Node.js runtime

  • Elixir

  • Python

  • Ruby

  • Haskell + Elm

  • Java

Past projects and SaaS

  • pomodoro.cc - focus and producticity timer (RIP)

  • cryptosheet.cc - crypto portfolio management using spreadsheets (RIP)

  • productlistings.app - ebay product listings generator (RIP)

  • threadbuilder.app - twitter thread builder and scheduler (RIP)

  • decent.social - privacy-friendly RSS-only Twitter reader (RIP)