Joop Lammerts

Joop Lammerts

(Di|Con)vergent Mob Refactoring

@jlammerts · the Netherlands
Developer at Procurios



Joop has been a webdeveloper since the beginning of web 2.0. After working in solitude for ages he now finds himself surrounded by enthusiastic colleagues. Developer and Scrum Master at Procurios, Formula One and music enthusiast at home.

(Di|Con)vergent Mob Refactoring

By Pim Elshoff & Joop Lammerts

Programmers come in all kinds and sizes. But we’ve found that there is one major distinction that keeps us from working together: attitude. Optimistic programmers tend to come up with solutions quickly, while not always respecting the problem. Pessimistic programmers tend to come up with questions quickly, while not always respecting simpler solutions.

Working together can be difficult. But by explicitly diverging and converging we can find respect for each other and what we have to bring to the table. By working together we find better solutions than we could working alone.

We will group up in teams of four or five, in so called mobs, and work on a case study in pomodoro’s. We will first diverge, to give the optimists their moment in the spotlight, where they can create tempo and get some things done. Then we will converge and give the pessimists the power, where they can refine and get things done well. If you’re not sure what your attitude is, then we will help you discover it.

We will be helping MeetInc. Their current implementation of what a meetup is, is sorely lacking. And the business has come with new rules. We will use this opportunity to make the code reflect the domain of meetups better.

Your exact mission, should you choose to accept it, will be presented to you on GitHub shortly. And fear not, you are not alone. Your team is there with you, as are the business experts, who can answers all of your questions.


  • Refactoring anemic models to useful domain concepts
  • Divergence and convergence
  • Timeboxing

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