I’ve already written about the importance of daily practicing for software developers. One essential habit is Playgrounding, where developers practice in easily accessible try-out areas.

Playgrounds are great for tactical programming, when you want to explore a language feature or a certain technique. In order to try out strategic — or larger — ideas you need something else, something I call Masterpieces.

I borrowed the term Masterpiece from the guild system that was (and still is in many countries) responsible for the education of professional craftsmen. Journeymen who want to become masters not only have to take theoretical lessons and write exams; at the end they have to present a so-called ‘masterpiece’ which is meant to demonstrate that they possess the required skills of the trade.

In my opinion, developers should work on Masterpieces, too.

By my definition, a Masterpiece is a project that serves to improve development skills, provides real-world utility to others, and demonstrates the skill and maturity levels to potential clients and employers.

The last point should not be underestimated. As a hiring manager, would you rather hire developers who can demonstrate their abilities (and stamina) to create real-world software products or people who just claim how good they are? (Usually, for legal reasons, it is next to impossible to show production code from a previous (commercial) product that candidates have worked on, but with Masterpieces it is easy.)

Masterpieces don’t have to be true masterpieces according to the other generally accepted definition of the term: “works of art of outstanding quality and/or novelty”. If they are, that’s terrific, but the main focus of a Masterpiece is on skill-improvement and demonstrating the “can-and-willing-to-do” attitude of a developer. Nevertheless, it goes without saying that Masterpieces should be of decent quality. For instance, source code should be laid-out nicely, have good identifier names and there should be documentation, at least a README file, that shows how to use it. If there are automated unit tests, so much the better!

Here is an example of a very small Masterpiece. Some time ago, while trying to improve my Python skills, I wrote a tiny tool called “NoComment!” — a Python script that scans C/C++/Java source code and counts the total number of commented and uncommented lines. It also calculates a comment-density metric. Call it trivial, but it does have real-world utility. You can use it to easily find out if there is code in your project with too little documentation. Even though it is extremely simply, I added a README file, some regression tests and put it up on Sourceforge.

But just showing that you are a great coder is not enough these days — social and especially communication skills are at least as important.

That’s why Masterpieces are not limited to implementing software. You can improve, share, and demonstrate your skills by hosting blogs, giving lectures at conferences, publishing tutorials, podcasts, screencasts, and by contributing to Q&A sites like (who wouldn’t want to hire Jon Skeet for his next C# project?).

Masterpieces are a clear win-win habit: you can improve and demonstrate your skills, while others benefit from your knowledge and experience. Just like in the guild system, you cannot become or be a master without them.

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