More Website Templates @ - August26, 2014!


Let me help you!

I'm a coding junkie willing to share my experience in terms of writing clean and testable code.

If you or your company does or would like to do any of those concepts to the left just contact me and let's have a chat about it!

If you want to I can give a talk at your office about either of those subjects too!


Career milestones

First commercial project created during studies. I co-authored the b-link project. The software created for the disabled people allows you to control your computer by blinking your eyes.
Created the Business Rule Management with Drools DZone Refcard together with Mario Fusco.
I co-organize and was an event host at Warsaw Groovy User Group. Gave talks: flashtalk about XMLs and AST transformations.
In Groovy core version 2.3.0 the @Builder AST transformation was released. I'm the co-author of that solution.
My largest book so far (284 pages), also about Mockito, called Mockito Cookbook by Packt Publishing. It contains over 65 recipes to get you up and running with unit testing using Mockito.
Dreams do come true. In December 2015 I've joined Pivotal and the Spring Cloud team. I'm mainly doing the Spring Cloud Sleuth project which is about Distributed Tracing. I'm working with the best engineers in the world! Sky is the limit :)
I'm the author of the blog where I post about the most interesting programming related things that I've seen. Or at least those that most likely I would have forgotten about ;)
Wrote my first 66 page book about Mockito entitled Mockito Instant by Packt Publishing.
I'm the co-author of the Uptodate Gradle plugin that tells you what libs have new versions on Maven Central / jCenter, so when you come back to a project, you know what you can update.
During an r&d at 4finance I created the Spock Subject-Collaborator extension (a port of the Mockito's @InjectMocks functionality).
At 4finance I lead a team that has been developing open source solutions for the microservice approach. I'm the co-author of the micro-infra-spring project.
To be

About me

Marcin Grzejszczak
Enthusiast of clean coding and good design. Author of "Mockito Instant" and "Mockito Cookbook" books. Contributor to several open source projects (including Rest-assured, Drools, Moco, Mockito). Co-author of the Groovy @Builder, "micro-infra-spring", "spring-cloud-zookeeper", "spring-cloud-sleuth" microservices related open source solutions. Author of Uptodate Gradle plugin, Spock subjects-collaborators extension and gradle-test-profiler open source projects. Co-founder of the Warsaw Groovy User Group. A member of the Most Valuable Blogger program at DZone and Java Code Geeks. Interested in working with JVM languages, XP-driven projects with continuous deployment and most preferably microservice architecture.

Currently hacking Spring Cloud at Pivotal

Co-organizer of the Warsaw GR8 Day Conference


How to get in touch?

If you're interested in my services you can:

Write to me!