Jarosław Ratajski

JDD

4 presentations

JUG Łódź

3 presentations

4Developers

2 presentations

GeeCON

2 presentations

Kielce JUG

2 presentations

Scalar

2 presentations

Confitura

1 presentation

J

Java User Group Łódź

1 presentation

JUG Poznań

1 presentation

Lambda Days

1 presentation

Polish Java User Group

1 presentation

Pozitive Technologies

1 presentation

Rzeszów JUG

1 presentation

Sesja Linuksowa

1 presentation

Silesia JUG

1 presentation