A Beginner’s Guide to Addressing Concurrency Issues

April 20, 2016

Inserts, updates and deletes. Every framework tutorial starts with these and they are seen as the most basic functionality that just works. But what if two concurrent requests try to modify the same data? Or try to insert the same data that should be unique? Or the inserts and updates have side-effects that have to […]


Software Can’t Live On Its Own

March 30, 2016

We’re building software in hope that some day we’ll leave it and it will live on its own. Or with minor supervision. But the other day when my father asked me to dig an old website, I did some thinking and realized auto-pilot software is almost never the case. Software is either being supported, or […]


Take a Step Back

March 19, 2016

A software project can become “legacy” just after three months from its inception. I’ve recently seen many projects that look OK on the surface, but are in fact so “broken”, that they have to be rewritten. Well, they work, but continuing their support is a pain. And everyone has probably seen at least one such […]


Issues With Electronic Machine Readable Travel Documents

February 3, 2016

Most of us have passports, and most of these passports are by now equipped with chips that store some data, including fingerprints. But six months ago I had no idea how that operates. Now that my country is planning to roll out new identity documents, I had to research the matter. The chip (which is […]


Microservices Use Cases

January 19, 2016

A few months ago I wrote a piece in defence of monoliths and then gave a talk about it. Overall, one should not jump to microservices, because the overhead and risk are much higher than any professed benefits. But there I left out some legitimate use cases for microservices. These use cases may not be […]


Testing: Appetite Comes With Eating

January 11, 2016

I’ve written a lot about testing. Some tips on integration tests, some how-tos, some general opinions about tests. But I haven’t told my “personal story” about testing. Why are tests needed should be obvious by now. It’s not all about finding bugs (because then you can use an excuse like “QAs will find them anyway”), […]


Electronic Identification

December 1, 2015

On the conference where I spoke about e-voting, I had another talk that focused on e-identification (which is a mandatory step for e-voting). It is in Bulgarian and EU context, given the new EU Regulation that aims at cross-border e-identification. Nearly 2 years ago I did a campaign for that, not knowing the European parliament […]


A Problem With Convention-Over-Configuration

November 15, 2015

Convention-over-configuration is a convenient thing. Instead of writing tons of configuration in xml/yaml/json/whatever, you simply know that something will have a given default value. For example, the restful endpoint URL may have a value of /class-name/method-name, or a join table will be named mainEntity_joinField. A “view” can be populated by default with the input parameters […]


E-voting [presentation]

November 13, 2015

Last week I gave a talk on the OpenFest conference about (remote) e-voting (or internet voting/i-voting). The talk was not in English, but here are my translated slides: I’ve addressed some of the topics from the presentation in a previous post. Overall, it’s a hard problem, with a lot of issues to be addressed and […]


In Defence of Monoliths

October 22, 2015

The first Microservices talk I attended was a year and a half ago. My first reaction was “why is that something new?”. Then I realized it is already getting overhyped, so I listened to some more talks, read a bit more articles, so that I can have a good reason not to like the hype. […]