Applied Lean Startup Ideas: Continuous Deployment at kaChing; Video!

June 05, 2010

Applied Lean Startup Ideas: Continuous Deployment at kaChing View more presentations from Pascal-Louis Perez. For more information check out the Continuous Deployment at kaChing; Slides! post.

Findbugs, Hudson and Pizza Driven Development (PDD)

April 15, 2010

As you may know kaChing (now Wealthfront) is an test driven engineering organization. Test driven is not an option, its a must. We move fast and push code to production few dozens of times a day in a five minutes release cycle, so we must have high confidence in our code. In complex systems there… Read more

Testing with Hibernate

April 08, 2010

Some of the unit tests I wrote lately involved setting up a data setup in the DB and testing the code using and mutating it. To make it clear, the DB is an in memory DB so the setup is super fast without IO slowdowns. Its very easy to do the setup using hibernate but… Read more

Parallelizing JUnit test runs

February 20, 2010

Test runs should be as fast as possible in order to allow a lean development cycle. One of the applications is a Continuous Deployment (see Lean Startup). Using strong multi-core machines to run tests is not enough since most unit tests are using a single thread per test. Apart of reducing IO to minimum, having… Read more

Complement TDD with MDA

January 10, 2010

Test Driven Development (aka TDD) is on the rise. Good developers understand that code with no proper testing is dead code. You can’t trust it to do what you want and its hard to change. I’m a strong believer in Dijkstra’s observation that “Program testing can be a very effective way to show the presence… Read more

Subversion Backup

January 02, 2010

Yes, we’re using Subversion. I know that distributed version control systems (e.g. Git) are cool and we might get there sometime, but for misc reasons we’re still using SVN. For the records, some of us are using GIT-SVN and we’re working and releasing from trunk (part of a the lean startup methodology) so the branching… Read more