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:

• Testing, deploying, managing and securing “Sekai” Full Nodes based on Tendermint Core
  (Byzantine-Fault Tolerant State Machines or Blockchain, for short)
• Debian / Ubuntu Linux System Administration
• Docker virtualization
• Basic Front-end development (HTML, CSS, Bootstrap, Visual Studio Code)
• Consulting technical solutions
• Bug reporting
• Administration of main and national community groups
• Finance Management

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:

• Project management and tasks coordination
• Recruiting, tutoring and helping Junior Software Engineers
• Code review
• Specifying software business requirements (business analysis)

Projects:

• Włączeni mobile
  Tech Stack: Flutter / Dart, Intellij Idea Ultimate, draw.io

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

Projects:

• Day Closure
  Application responsible for everyday settlements in 4 internal systems of PWPW S.A. company
  Tech stack: Java 11, Spring Boot, Spring Security, Spring Data, Spock, git, IntelliJ Idea Ultimate
  
• WORD exams reservations
  Application responsible for scheduling and signing up for exams of driver card license
  Tech stack: Java 11, Spring Boot, Spring Security, Spring Data, Spock, git, IntelliJ Idea Ultimate
• Tacho router
  Application responsible for routing data from GITD to internal company system managing drivers card of PWPW S.A. company.
  Tech stack: Java 11, Spring Boot, Apache Camel, git, IntelliJ Idea Ultimate

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:

• Development of front-end page
  Tech Stack: HTML5, CSS3, JS, Bootstrap, Vue.js, Intellij Idea, git, GitHub
• Consulting technical aspects of back-end and blockchain development

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:

• Implementing new Front-end and Middleware features, bug fixing and preparing documentation
  Tech stack: Java 8, Eclipse, JEE (JCA 1.5, JSF 2.0, EJB 3.0, WS),
  Oracle Weblogic, Oracle SQL Developer, SoapUI, BIRT Report Designer, SVN, Redmine.