I am an author, speaker, and loud-mouth on the design of enterprise software. I work for ThoughtWorks, a software delivery and consulting company. This site contains lots of my writing on software development, which primarily focuses on software design and agile methods. To find your way around this site, go to the intro guide.


News and Updates

My atom feed (RSS) announces any updates to this site, as well as various news about my activities and other things I think you may be interested in. I also make regular announcements via my twitter feed, which I copy to my facebook page.


Bliki: Yagni

Tue 26 May 2015 09:19 EDT

Yagni originally is an acronym that stands for "You Aren't Gonna Need It". It is a mantra from ExtremeProgramming that's often used generally in agile software teams. It's a statement that some capability we presume our software needs in the future should not be built now because "you aren't gonna need it".

more ...


photostream 84

Sat 16 May 2015 10:06 EDT

Venice, Italy


Bliki: MicroservicePremium

Wed 13 May 2015 09:39 EDT

The microservices architectural style has been the hot topic over the last year. At the recent O'Reilly software architecture conference, it seemed like every session talked about microservices. Enough to get everyone's over-hyped-bullshit detector up and flashing. One of the consequences of this is that we've seen teams be too eager to embrace microservices, not realizing that microservices introduce complexity on their own account. This adds a premium to a project's cost and risk - one that often gets projects into serious trouble.

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Retreaded: CodeAsDocumentation

Wed 25 Mar 2015 09:14 EDT

Retread of post orginally made on 22 Mar 2005

One of the common elements of agile methods is that they raise programming to a central role in software development - one much greater than the software engineering community usually does. Part of this is classifying the code as a major, if not the primary documentation of a software system.

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photostream 83

Tue 03 Mar 2015 06:49 EST

Provincetown, MA


Bliki: BeckDesignRules

Mon 02 Mar 2015 09:20 EST

Kent Beck came up with his four rules of simple design while he was developing ExtremeProgramming in the late 1990's. I express them like this.

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Continuous Integration and Delivery

For a long time I’ve been a champion of Continuous Integration which reduces integration risk by integrating early and often, an application of the principle of Frequency Reduces Difficulty. We’ve found CI to be a core technique at ThoughtWorks and use it almost all the time. At the heart of this is a style of development that minimizes long feature branches with techniques like Branch By Abstraction and Feature Toggles.

While this is useful, there was still risk present from software that works in the development environment to getting it to work in production. As a result we developed Deployment Pipelines to reduce this risk, moving closer to our aim of Continuous Delivery: building software in such a way that we confidently deploy the latest builds into production whenever there is a business need. We find this improves feedback, reduces risk, and increases the visibility of project progress.

For more information: take a look at my guide page on Continuous Delivery.


NoSQL Databases

I’ve been involved in enterprise software for two decades and while we’ve seen huge technological change during that time, the relational database has been a constant figure. Previous attempts to dethrone relational databases have failed, but some people think the new rise of NoSQL databases will finally consign relational databases to history. While I think relational databases are going to an important part of the landscape for a long time, I do think that there is a big change coming in the database field.

I’ve been collaborating with my colleague Pramod Sadalage, on exploring and explaining this shift. For more information take a look at the nosql guide.


TW logo

I discovered ThoughtWorks in 2000: then a small American company whose philosphy of software development was remarkably similar to my own. Now we’ve grown to around 2500 people world-wide, but kept the values that make us special. My colleagues have built critical systems for many clients in that time, and I’ve learned many lessons from them. While doing this, we found we often didn’t have the tools we needed, so we started to build them. This led to open-source tools such as CruiseControl, Selenium, Frank, and Moco as well as commercial products.

I have many opportunities, but I’ve stayed at ThoughtWorks because of the quality of my colleagues, who include both well-known speakers and those who may not be famous names but do an excellent job of software delivery (and feed me the information to write about). We are inspired by working with each other and our unusual three-pillar philosophy that raises professional excellence and social justice to the same level as financial performance.

And we are always looking for more great people to join our curious company. Maybe I’ll see you in one of our offices some day.





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