The Psychology of the Extreme Programmer

There has been an interesting thread going on in the Extreme Programming Yahoo group. I haven’t read the whole thing, but I’ve cherry picked out some good posts from the list.

Steve Gordon posted one that I find particularly interesting. He posits:

I am finding that the most productive pairings are when the knowledge of the more junior developer is not a proper subset of the knowledge of the more senior developer, but complements it in some way. For example, when the junior developer is more familiar with a new domain or a new technology, the senior developer may still dominate the design, but the junior developer can make a contribution, which then creates a true partnership that allows each of them to learn from the other. The junior then picks up the more general development and design skills.

Therefore, when starting a new project, I would recommend selecting senior developers based on general skills rather than knowledge of the specific domain or technologies and selecting junior developers based on knowledge the specific domain or technology (as well as growth potential, of course). This recommendation is the exact opposite of what most people do.

I find this advice very interesting, and as he says, completely contradictory to what most projects do.

While I’ve always believed that knowledge of a specific technology is important, knowledge of how to build software is even more important. And this knowledge is much harder to find. But its the engine that makes projects go.

I’m not running down technology knowledge at all, as I know that’s critical for a project’s success — I just believe it is a lot easier to find someone well versed in J2EE or ASP.Net, for example, than it is to get someone who understands the tradeoffs that have to be made when designing and implementing a system. And someone who can gently mentor someone into being a more senior developer.

This fits in well with the profile of an expert agile developer as being someone who is really, really good at a lot of tasks, but perhaps not expert at any of them. What they have developed is the ability to pick up new technical topics as needed, very quickly. But they can always apply their software knowledge to any task, integrating the pieces into a coherent whole.

Companies would do a lot better to hire a bunch of these expert generalists and subsidize them with a sprinkling of young bucks, to bring the new tech expertise and to be groomed as the next generation of experts.

— bab

UPDATED — to fix formatting under IE. It read just fine in BlogJet before posting, and it reads just fine in Firefox, but IE runs the quoted stuff all into one line. Readjusted the BlogJet-produced HTML to make it flow properly. Thanks for the comment, Mark

6 thoughts to “The Psychology of the Extreme Programmer”

  1. Brian – Please edit this post so that it fits well on your page. This one post makes the all the others very difficult to read because we have to scroll so much to the right.

    Thanks

  2. Ahhh! Thanks Brian.

    Interesting approach. I don’t like the whole paired-programming thing at all. I’d much rather give every developer access to a PC and let the group work (physically) very close together.

    This way, ideas are shared and problems are discussed and solved quickly.

  3. I’ve run into something similar on a previous project. I was brand new to the company, so I wasn’t going to be in charge of anything. 🙂 The consultant I was working with had gathered the requirements and had worked with the client before, but my technical skills were much better. That’s one time I did enjoy pair programming doing real code, not contrived examples. I wrote about it here:

    http://dotnetjunkies.com/WebLog/darrell.norton/archive/2003/08/13/1073.aspx

  4. am weary of labels like junior developer, senior developer, why not subject matter expert /domain expert and maybe program manager or results manager. I wouldn’trust anyone calling themselves senior this or that because in software development senior quite often means they have many bad habits collected from their past and are most likely not flexible enough to change. Don’t do it, don’t use heirarchical labels, its unneccesary tension. Focus on results and have that determine titles, it clarifies responsibilities too, effective people never let this stuff(sd) go to their heads, it doesn’t matter what you are called s’long as you get stuff done, that’s your job security, not some illusional arbitrary title

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    <a href="http://perso.wanadoo.es/dmm300/xgxady/"&gt;??????</a>

    <a href="http://perso.wanadoo.es/dmm300/yylt/"&gt;????</a>

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    <a href="http://perso.wanadoo.es/dmm300/zxcrdy/"&gt;??????</a>

    <a href="http://perso.wanadoo.es/dmm300/zxhsdy/"&gt;??????</a>

    <a href="http://perso.wanadoo.es/dmm300/zxjqdy/"&gt;??????</a>

    <a href="http://perso.wanadoo.es/dmm300/zxqsdy/"&gt;??????</a>

    <a href="http://perso.wanadoo.es/dmm300"&gt;??????</a>

    <a href="http://perso.wanadoo.es/dmm300/zxtkdy/"&gt;??????</a>

    <a href="http://perso.wanadoo.es/dmm300/zxxady/"&gt;??????</a>

    <a href="http://www.caishow.com/?f=4607/index.htm"&gt;????</a>

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    <a href="http://www.caishow.com/?f=4607/index.htm"&gt;????</a>“>http://www.caishow.com/?f=4607/index.htm"&gt;????</a>

    <a href="http://www.caishow.com/?f=4607/index.htm"&gt;????</a>

    <a href="http://www.caishow.com/?f=4607/index.htm"&gt;??????</a>

    <a href="http://www.caishow.com/?f=4607/index.htm">mp3????</a>“>http://www.caishow.com/?f=4607/index.htm">mp3????</a>

    <a href="http://www.caishow.com/?f=4607/index.htm"&gt;??????</a>

    <a href="http://www.caishow.com/?f=4607/index.htm"&gt;????</a>“>http://www.caishow.com/?f=4607/index.htm"&gt;????</a>

    <a href="http://www.caishow.com/?f=4607/index.htm"&gt;??????</a>

    <a href="http://www.caishow.com/?f=4607/index.htm">mp3????</a>“>http://www.caishow.com/?f=4607/index.htm">mp3????</a>

    <a href="http://www.caishow.com/?f=4607/index.htm"&gt;??????</a>

    <a href="http://www.caishow.com/?f=4607/index.htm"&gt;????</a>

    <a href="http://www.caishow.com/?f=4607/index.htm"&gt;??????</a>

    <a href="http://www.caishow.com/?f=4607/index.htm"&gt;????</a>

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