Karol Wietrzyński

Hey, what’s up.
I’m not the best at writing great introductions although I will try to make it informative and (somehow) interesting.

So, I am an experienced Software Engineer, Linux fanatic and Blockchain enthusiast. I love exploring new technologies, optimizing software and tweaking the environment in my spare time. Most of my commercial experience I have in Java 8 / Java 11 and JEE / Spring frameworks but a few months ago I discovered Dart / Flutter and I fell in love with it :-).

Here you can find more about my experience:

Operations Administrator

KIRA, Full-time
Employed: Oct 2020 – Present
Localisation: Remote

First network that hosts, powers and secures DeFi applications with value of real assets at stake. Financial hub connecting decentralized Web3 applications.

Responsible for:

Tech stack: Tendermint Core, Cosmos SDK, Debian / Ubuntu Linux OS, Docker, Shell scripting, HTML + CSS, Bootstrap

Technical Team Lead (Mobile Flutter)

Włączeni, Full-time
Employed: Oct 2020 – Jan 2021
Localisation: Remote.

Non-profit organization that brings together volunteers and volunteer organizations.
Włączeni also aims to help find interesting tasks that could improve local communities.

Responsible for:


Software Engineer (Java)

PWPW S.A., Full-time

Employed: Apr 2020 – Sep 2020
Localisation: Remote

Employed: Jan 2020 – Mar 2020
Localisation: Warsaw, Masovian District, Poland


Software Engineer (Front-end)

KIRA, Part-time
Employed: Feb 2019 – Dec 2019
Localisation: Remote

KIRA - new decentralized cryptocurrency exchange that delivers trustless cross-chain token transfers and trading.

Responsible for:

Junior Software Engineer (Java)

Asseco Poland, Full-time
Employed: May 2018 – Dec 2019
Localisation: Warsaw, Masovian District, Poland

Junior Java front-end and middleware engineer of the Centralized Billing System at PKOBP Bank.

Responsible for: