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Lessons Learned from Fixing Flaky Tests with Claude
We recently sped up our integration tests by a factor of ten by running many of them in parallel. There were several flaky tests in the new test suite. Claude was really useful in getting rid of...
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With Claude: Less Coding, More Testing
Having used Claude Code for a few months now, I have noticed how software development has changed for me. I write a lot less code, but I spend more time understanding and testing the code Claude has...
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In Praise of –dry-run
For the last few months, I have been developing a new reporting application. Early on, I decided to add a –dry-run option to the run command. This turned out to be quite useful – I have used it many...
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Lessons From 9 More Years of Tricky Bugs
Since 2002, I have been keeping track of all the tricky bugs I have come across. Nine years ago, I wrote a blog post with the lessons learned from the bugs up till then. Now I have reviewed all the...
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More Good Programming Quotes, Part 6
Here are more good programming quotes I have found since my last post. Programming “Configuration is coding in a poorly designed programming language without tests, version control, or...
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Programming Conference – Jfokus Stockholm 2025
This week I attended the Jfokus software development conference in Stockholm, Sweden. I first went in 2011, and I have been back many times through the years. The conference has a Java focus (duh!),...
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Programming With ChatGPT
Using ChatGPT when I code has been a real productivity boost for me. Instead of reading an example on Stack Overflow and figuring out how to adapt it to my particular case, I immediately get code...
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Finding a New Software Developer Job
For the first time ever, I was laid off, and had to find a new software developer job. I managed to find a new one, but it took longer than I thought, and it was a lot of work. I was in contact with...
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Tidy First?
“Software design is preparation for change; change of behavior” Tidy First? is a new book by Kent Beck. It is a short little book, only about 100 pages (and lots of white space on them), but it...
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What I Have Changed My Mind About in Software Development
I really like this quote from Jeff Bezos: “Anybody who doesn’t change their mind a lot is dramatically underestimating the complexity of the world we live in.” Lately I have been thinking about what I...
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Well-maintained Software
Two months ago, I was a guest on the Maintainable podcast. The first question the host Robby Russell asks is “What are a few characteristics of well-maintained software?”. This is such a great...
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There Is No Software Maintenance
Every time I hear about software maintenance as a distinct activity, I cringe. That’s because it is based on the outdated notion that first software is developed, then it is maintained. But that is...
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Switching to Go – First Impressions
A few months ago I switch to working in Go. Before that, my main language was Python for many years. The change to Go has been very smooth, without any major surprises or stumbling blocks. This may...
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Effective Software Testing – A Developer’s Guide
I recently finished Effective Software Testing – A Developer’s Guide by Maurício Aniche, and I really liked it. I have been coding for a long time and I think I have been writing pretty good tests for...
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On Code Reviews
There seems to be an established truth in programming that code reviews find a lot of bugs. An example is chapter 18 (Modern Code Review) in the book Making Software. This is however not my experience...
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Book Review: A Philosophy of Software Design
I really liked A Philosophy of Software Design by John Ousterhout. It is compact and short, only 170 pages, so it is a quick read, but it contains many good ideas. The focus is on how to structure...
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On Comments in Code
I used to think that I didn’t need comments if I wrote self-documenting code. However, I have realized that I do write comments, and that I find them really useful. To see how many comments I write,...
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4 Things I Like About Microservices
Microservices have gone through a complete hype cycle. From being hailed as the one true way to build systems, to a backlash where they are often considered too difficult and complex. In a way though,...
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Recruiting Software Developers – Coding Tests
For the past few months, I have been interviewing with several companies. In all cases, one or more coding tests were included. I have also been on the interviewing side, evaluating a coding test....
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More Good Programming Quotes, Part 5
Here are more good programming quotes I have found since my last post. Programming “It has been said that the great scientific disciplines are examples of giants standing on the shoulders of other...
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