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.
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.
Sun 30 Aug 2015 21:36 CEST
Thu 27 Aug 2015 16:13 CEST
My brief thoughts on watching my newly acquired DVD of Citizen Four - a film about the whistleblower Edward Snowden.
Wed 26 Aug 2015 15:45 CEST
One of the most common ways to modularize an information-rich program is to separate it into three broad layers: presentation (UI), domain logic (aka business logic), and data access. So you often see web applications divided into a web layer that knows about handling http requests and rendering HTML, a business logic layer that contains validations and calculations, and a data access layer that sorts out how to manage persistant data in a database or remote services.
Tue 25 Aug 2015 15:49 CEST
Andrew Koenig first coined the term "antipattern" in an article in JOOP, which is sadly not available on the internet. The essential idea (as I remember it ) was that an antipattern was something that seems like a good idea when you begin, but leads you into trouble. Since then the term has often been used just to indicate any bad idea, but I think the original focus is more useful.
Tue 18 Aug 2015 15:43 CEST
Alignment maps are organizational information radiators that help visualize the alignment of ongoing work with business outcomes. The work may be regular functionality addition or technical work such as re-architecting or repaying technical debt or improving the build and deployment pipeline. Team members use alignment maps to understand what business outcomes their day-to-day work is meant to improve. Business and IT sponsors use them to understand how ongoing work relates to the business outcomes they care about.
Sun 09 Aug 2015 16:28 CEST
Wed 05 Aug 2015 15:28 CEST
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.
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 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.