Greetings, I'm Daniel Olszewski

Software Developer / Team Leader / Blogger

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About Me

I have been programming professionally since the beginning of 2011, but my keenness for coding has been born much earlier. Having a particular interest in the JVM ecosystem and web development, I am mostly focusing on technologies related to Java, JavaScript, and web. Although, I do not limit myself only to these and keep an open mind to new ideas and trends.

My skills

What I Can Offer

Software Development

Different-sized projects from various industries in the portfolio.

High-level Design

Presenting a big picture understandable by technical and non-technical people.

Requirement Analysis

A direct contact with business representatives.

Team Leadership

Group guidance to achieve a common goal.

Technical Mentoring

Knowledge sharing with less experienced colleagues.

Technical Writing

Technical communication of complex topics in an easily digestible form.


Years of experience


Projects completed


Millions CHF saved
in a single project


  • Java
  • JavaScript
  • HTML & CSS
  • SQL
  • Scala
  • Scrum
  • Continuous Delivery
  • TDD
  • Spring Framework
  • Angular